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1075 lines
38 KiB
Python
1075 lines
38 KiB
Python
5 years ago
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"""Test the numpy pickler as a replacement of the standard pickler."""
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import copy
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import os
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import random
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import sys
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import re
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import io
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import warnings
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import gzip
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import zlib
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import bz2
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import pickle
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import socket
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from contextlib import closing
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import mmap
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from joblib.test.common import np, with_numpy, with_lz4, without_lz4
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from joblib.test.common import with_memory_profiler, memory_used
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from joblib.testing import parametrize, raises, SkipTest, warns
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# numpy_pickle is not a drop-in replacement of pickle, as it takes
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# filenames instead of open files as arguments.
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from joblib import numpy_pickle, register_compressor
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from joblib.test import data
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from joblib._compat import PY3_OR_LATER
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from joblib.numpy_pickle_utils import _IO_BUFFER_SIZE
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from joblib.numpy_pickle_utils import _detect_compressor
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from joblib.compressor import (_COMPRESSORS, _LZ4_PREFIX, CompressorWrapper,
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LZ4_NOT_INSTALLED_ERROR, BinaryZlibFile)
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###############################################################################
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# Define a list of standard types.
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# Borrowed from dill, initial author: Micheal McKerns:
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# http://dev.danse.us/trac/pathos/browser/dill/dill_test2.py
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typelist = []
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# testing types
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_none = None
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typelist.append(_none)
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_type = type
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typelist.append(_type)
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_bool = bool(1)
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typelist.append(_bool)
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_int = int(1)
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typelist.append(_int)
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try:
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_long = long(1)
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typelist.append(_long)
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except NameError:
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# long is not defined in python 3
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pass
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_float = float(1)
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typelist.append(_float)
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_complex = complex(1)
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typelist.append(_complex)
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_string = str(1)
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typelist.append(_string)
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try:
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_unicode = unicode(1)
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typelist.append(_unicode)
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except NameError:
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# unicode is not defined in python 3
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pass
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_tuple = ()
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typelist.append(_tuple)
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_list = []
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typelist.append(_list)
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_dict = {}
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typelist.append(_dict)
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try:
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_file = file
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typelist.append(_file)
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except NameError:
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pass # file does not exists in Python 3
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try:
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_buffer = buffer
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typelist.append(_buffer)
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except NameError:
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# buffer does not exists in Python 3
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pass
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_builtin = len
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typelist.append(_builtin)
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def _function(x):
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yield x
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class _class:
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def _method(self):
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pass
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class _newclass(object):
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def _method(self):
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pass
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typelist.append(_function)
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typelist.append(_class)
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typelist.append(_newclass) # <type 'type'>
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_instance = _class()
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typelist.append(_instance)
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_object = _newclass()
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typelist.append(_object) # <type 'class'>
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###############################################################################
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# Tests
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@parametrize('compress', [0, 1])
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@parametrize('member', typelist)
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def test_standard_types(tmpdir, compress, member):
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# Test pickling and saving with standard types.
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filename = tmpdir.join('test.pkl').strpath
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numpy_pickle.dump(member, filename, compress=compress)
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_member = numpy_pickle.load(filename)
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# We compare the pickled instance to the reloaded one only if it
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# can be compared to a copied one
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if member == copy.deepcopy(member):
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assert member == _member
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def test_value_error():
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# Test inverting the input arguments to dump
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with raises(ValueError):
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numpy_pickle.dump('foo', dict())
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@parametrize('wrong_compress', [-1, 10, dict()])
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def test_compress_level_error(wrong_compress):
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# Verify that passing an invalid compress argument raises an error.
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exception_msg = ('Non valid compress level given: '
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'"{0}"'.format(wrong_compress))
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with raises(ValueError) as excinfo:
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numpy_pickle.dump('dummy', 'foo', compress=wrong_compress)
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excinfo.match(exception_msg)
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@with_numpy
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@parametrize('compress', [False, True, 0, 3, 'zlib'])
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def test_numpy_persistence(tmpdir, compress):
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filename = tmpdir.join('test.pkl').strpath
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rnd = np.random.RandomState(0)
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a = rnd.random_sample((10, 2))
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# We use 'a.T' to have a non C-contiguous array.
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for index, obj in enumerate(((a,), (a.T,), (a, a), [a, a, a])):
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filenames = numpy_pickle.dump(obj, filename, compress=compress)
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# All is cached in one file
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assert len(filenames) == 1
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# Check that only one file was created
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assert filenames[0] == filename
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# Check that this file does exist
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assert os.path.exists(filenames[0])
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# Unpickle the object
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obj_ = numpy_pickle.load(filename)
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# Check that the items are indeed arrays
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for item in obj_:
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assert isinstance(item, np.ndarray)
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# And finally, check that all the values are equal.
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np.testing.assert_array_equal(np.array(obj), np.array(obj_))
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# Now test with array subclasses
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for obj in (np.matrix(np.zeros(10)),
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np.memmap(filename + 'mmap',
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mode='w+', shape=4, dtype=np.float)):
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filenames = numpy_pickle.dump(obj, filename, compress=compress)
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# All is cached in one file
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assert len(filenames) == 1
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obj_ = numpy_pickle.load(filename)
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if (type(obj) is not np.memmap and
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hasattr(obj, '__array_prepare__')):
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# We don't reconstruct memmaps
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assert isinstance(obj_, type(obj))
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np.testing.assert_array_equal(obj_, obj)
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# Test with an object containing multiple numpy arrays
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obj = ComplexTestObject()
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filenames = numpy_pickle.dump(obj, filename, compress=compress)
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# All is cached in one file
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assert len(filenames) == 1
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obj_loaded = numpy_pickle.load(filename)
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assert isinstance(obj_loaded, type(obj))
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np.testing.assert_array_equal(obj_loaded.array_float, obj.array_float)
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np.testing.assert_array_equal(obj_loaded.array_int, obj.array_int)
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np.testing.assert_array_equal(obj_loaded.array_obj, obj.array_obj)
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@with_numpy
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def test_numpy_persistence_bufferred_array_compression(tmpdir):
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big_array = np.ones((_IO_BUFFER_SIZE + 100), dtype=np.uint8)
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filename = tmpdir.join('test.pkl').strpath
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numpy_pickle.dump(big_array, filename, compress=True)
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arr_reloaded = numpy_pickle.load(filename)
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np.testing.assert_array_equal(big_array, arr_reloaded)
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@with_numpy
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def test_memmap_persistence(tmpdir):
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rnd = np.random.RandomState(0)
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a = rnd.random_sample(10)
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filename = tmpdir.join('test1.pkl').strpath
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numpy_pickle.dump(a, filename)
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b = numpy_pickle.load(filename, mmap_mode='r')
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assert isinstance(b, np.memmap)
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# Test with an object containing multiple numpy arrays
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filename = tmpdir.join('test2.pkl').strpath
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obj = ComplexTestObject()
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numpy_pickle.dump(obj, filename)
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obj_loaded = numpy_pickle.load(filename, mmap_mode='r')
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assert isinstance(obj_loaded, type(obj))
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assert isinstance(obj_loaded.array_float, np.memmap)
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assert not obj_loaded.array_float.flags.writeable
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assert isinstance(obj_loaded.array_int, np.memmap)
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assert not obj_loaded.array_int.flags.writeable
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# Memory map not allowed for numpy object arrays
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assert not isinstance(obj_loaded.array_obj, np.memmap)
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np.testing.assert_array_equal(obj_loaded.array_float,
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obj.array_float)
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np.testing.assert_array_equal(obj_loaded.array_int,
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obj.array_int)
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np.testing.assert_array_equal(obj_loaded.array_obj,
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obj.array_obj)
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# Test we can write in memmapped arrays
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obj_loaded = numpy_pickle.load(filename, mmap_mode='r+')
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assert obj_loaded.array_float.flags.writeable
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obj_loaded.array_float[0:10] = 10.0
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assert obj_loaded.array_int.flags.writeable
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obj_loaded.array_int[0:10] = 10
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obj_reloaded = numpy_pickle.load(filename, mmap_mode='r')
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np.testing.assert_array_equal(obj_reloaded.array_float,
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obj_loaded.array_float)
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np.testing.assert_array_equal(obj_reloaded.array_int,
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obj_loaded.array_int)
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# Test w+ mode is caught and the mode has switched to r+
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numpy_pickle.load(filename, mmap_mode='w+')
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assert obj_loaded.array_int.flags.writeable
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assert obj_loaded.array_int.mode == 'r+'
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assert obj_loaded.array_float.flags.writeable
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assert obj_loaded.array_float.mode == 'r+'
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@with_numpy
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def test_memmap_persistence_mixed_dtypes(tmpdir):
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# loading datastructures that have sub-arrays with dtype=object
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# should not prevent memmapping on fixed size dtype sub-arrays.
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rnd = np.random.RandomState(0)
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a = rnd.random_sample(10)
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b = np.array([1, 'b'], dtype=object)
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construct = (a, b)
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filename = tmpdir.join('test.pkl').strpath
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numpy_pickle.dump(construct, filename)
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a_clone, b_clone = numpy_pickle.load(filename, mmap_mode='r')
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# the floating point array has been memory mapped
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assert isinstance(a_clone, np.memmap)
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# the object-dtype array has been loaded in memory
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assert not isinstance(b_clone, np.memmap)
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@with_numpy
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def test_masked_array_persistence(tmpdir):
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# The special-case picker fails, because saving masked_array
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# not implemented, but it just delegates to the standard pickler.
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rnd = np.random.RandomState(0)
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a = rnd.random_sample(10)
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a = np.ma.masked_greater(a, 0.5)
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filename = tmpdir.join('test.pkl').strpath
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numpy_pickle.dump(a, filename)
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b = numpy_pickle.load(filename, mmap_mode='r')
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assert isinstance(b, np.ma.masked_array)
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@with_numpy
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def test_compress_mmap_mode_warning(tmpdir):
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# Test the warning in case of compress + mmap_mode
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rnd = np.random.RandomState(0)
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a = rnd.random_sample(10)
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this_filename = tmpdir.join('test.pkl').strpath
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numpy_pickle.dump(a, this_filename, compress=1)
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with warns(UserWarning) as warninfo:
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numpy_pickle.load(this_filename, mmap_mode='r+')
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assert len(warninfo) == 1
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assert (str(warninfo[0].message) ==
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'mmap_mode "%(mmap_mode)s" is not compatible with compressed '
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'file %(filename)s. "%(mmap_mode)s" flag will be ignored.' %
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{'filename': this_filename, 'mmap_mode': 'r+'})
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@with_numpy
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@parametrize('cache_size', [None, 0, 10])
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def test_cache_size_warning(tmpdir, cache_size):
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# Check deprecation warning raised when cache size is not None
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filename = tmpdir.join('test.pkl').strpath
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rnd = np.random.RandomState(0)
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a = rnd.random_sample((10, 2))
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warnings.simplefilter("always")
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with warns(None) as warninfo:
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numpy_pickle.dump(a, filename, cache_size=cache_size)
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expected_nb_warnings = 1 if cache_size is not None else 0
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assert len(warninfo) == expected_nb_warnings
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for w in warninfo:
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assert w.category == DeprecationWarning
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assert (str(w.message) ==
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"Please do not set 'cache_size' in joblib.dump, this "
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"parameter has no effect and will be removed. You "
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"used 'cache_size={0}'".format(cache_size))
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@with_numpy
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@with_memory_profiler
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@parametrize('compress', [True, False])
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def test_memory_usage(tmpdir, compress):
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# Verify memory stays within expected bounds.
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filename = tmpdir.join('test.pkl').strpath
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small_array = np.ones((10, 10))
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big_array = np.ones(shape=100 * int(1e6), dtype=np.uint8)
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small_matrix = np.matrix(small_array)
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big_matrix = np.matrix(big_array)
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for obj in (small_array, big_array, small_matrix, big_matrix):
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size = obj.nbytes / 1e6
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obj_filename = filename + str(np.random.randint(0, 1000))
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mem_used = memory_used(numpy_pickle.dump,
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obj, obj_filename, compress=compress)
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# The memory used to dump the object shouldn't exceed the buffer
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# size used to write array chunks (16MB).
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write_buf_size = _IO_BUFFER_SIZE + 16 * 1024 ** 2 / 1e6
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assert mem_used <= write_buf_size
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mem_used = memory_used(numpy_pickle.load, obj_filename)
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# memory used should be less than array size + buffer size used to
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# read the array chunk by chunk.
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read_buf_size = 32 + _IO_BUFFER_SIZE # MiB
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assert mem_used < size + read_buf_size
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||
|
|
@with_numpy
|
||
|
|
def test_compressed_pickle_dump_and_load(tmpdir):
|
||
|
|
expected_list = [np.arange(5, dtype=np.dtype('<i8')),
|
||
|
|
np.arange(5, dtype=np.dtype('>i8')),
|
||
|
|
np.arange(5, dtype=np.dtype('<f8')),
|
||
|
|
np.arange(5, dtype=np.dtype('>f8')),
|
||
|
|
np.array([1, 'abc', {'a': 1, 'b': 2}], dtype='O'),
|
||
|
|
# .tostring actually returns bytes and is a
|
||
|
|
# compatibility alias for .tobytes which was
|
||
|
|
# added in 1.9.0
|
||
|
|
np.arange(256, dtype=np.uint8).tostring(),
|
||
|
|
# np.matrix is a subclass of np.ndarray, here we want
|
||
|
|
# to verify this type of object is correctly unpickled
|
||
|
|
# among versions.
|
||
|
|
np.matrix([0, 1, 2], dtype=np.dtype('<i8')),
|
||
|
|
np.matrix([0, 1, 2], dtype=np.dtype('>i8')),
|
||
|
|
u"C'est l'\xe9t\xe9 !"]
|
||
|
|
|
||
|
|
fname = tmpdir.join('temp.pkl.gz').strpath
|
||
|
|
|
||
|
|
dumped_filenames = numpy_pickle.dump(expected_list, fname, compress=1)
|
||
|
|
assert len(dumped_filenames) == 1
|
||
|
|
result_list = numpy_pickle.load(fname)
|
||
|
|
for result, expected in zip(result_list, expected_list):
|
||
|
|
if isinstance(expected, np.ndarray):
|
||
|
|
assert result.dtype == expected.dtype
|
||
|
|
np.testing.assert_equal(result, expected)
|
||
|
|
else:
|
||
|
|
assert result == expected
|
||
|
|
|
||
|
|
|
||
|
|
def _check_pickle(filename, expected_list):
|
||
|
|
"""Helper function to test joblib pickle content.
|
||
|
|
|
||
|
|
Note: currently only pickles containing an iterable are supported
|
||
|
|
by this function.
|
||
|
|
"""
|
||
|
|
if not PY3_OR_LATER:
|
||
|
|
if filename.endswith('.xz') or filename.endswith('.lzma'):
|
||
|
|
# lzma is not implemented in python versions < 3.3
|
||
|
|
with raises(NotImplementedError):
|
||
|
|
numpy_pickle.load(filename)
|
||
|
|
elif filename.endswith('.lz4'):
|
||
|
|
# lz4 is not supported for python versions < 3.3
|
||
|
|
with raises(ValueError) as excinfo:
|
||
|
|
numpy_pickle.load(filename)
|
||
|
|
assert excinfo.match("lz4 compression is only available with "
|
||
|
|
"python3+")
|
||
|
|
return
|
||
|
|
|
||
|
|
version_match = re.match(r'.+py(\d)(\d).+', filename)
|
||
|
|
py_version_used_for_writing = int(version_match.group(1))
|
||
|
|
py_version_used_for_reading = sys.version_info[0]
|
||
|
|
|
||
|
|
py_version_to_default_pickle_protocol = {2: 2, 3: 3}
|
||
|
|
pickle_reading_protocol = py_version_to_default_pickle_protocol.get(
|
||
|
|
py_version_used_for_reading, 4)
|
||
|
|
pickle_writing_protocol = py_version_to_default_pickle_protocol.get(
|
||
|
|
py_version_used_for_writing, 4)
|
||
|
|
if pickle_reading_protocol >= pickle_writing_protocol:
|
||
|
|
try:
|
||
|
|
with warns(None) as warninfo:
|
||
|
|
warnings.simplefilter('always')
|
||
|
|
warnings.filterwarnings(
|
||
|
|
'ignore', module='numpy',
|
||
|
|
message='The compiler package is deprecated')
|
||
|
|
result_list = numpy_pickle.load(filename)
|
||
|
|
filename_base = os.path.basename(filename)
|
||
|
|
expected_nb_warnings = 1 if ("_0.9" in filename_base or
|
||
|
|
"_0.8.4" in filename_base) else 0
|
||
|
|
assert len(warninfo) == expected_nb_warnings
|
||
|
|
for w in warninfo:
|
||
|
|
assert w.category == DeprecationWarning
|
||
|
|
assert (str(w.message) ==
|
||
|
|
"The file '{0}' has been generated with a joblib "
|
||
|
|
"version less than 0.10. Please regenerate this "
|
||
|
|
"pickle file.".format(filename))
|
||
|
|
for result, expected in zip(result_list, expected_list):
|
||
|
|
if isinstance(expected, np.ndarray):
|
||
|
|
assert result.dtype == expected.dtype
|
||
|
|
np.testing.assert_equal(result, expected)
|
||
|
|
else:
|
||
|
|
assert result == expected
|
||
|
|
except Exception as exc:
|
||
|
|
# When trying to read with python 3 a pickle generated
|
||
|
|
# with python 2 we expect a user-friendly error
|
||
|
|
if (py_version_used_for_reading == 3 and
|
||
|
|
py_version_used_for_writing == 2):
|
||
|
|
assert isinstance(exc, ValueError)
|
||
|
|
message = ('You may be trying to read with '
|
||
|
|
'python 3 a joblib pickle generated with python 2.')
|
||
|
|
assert message in str(exc)
|
||
|
|
elif filename.endswith('.lz4') and with_lz4.args[0]:
|
||
|
|
assert isinstance(exc, ValueError)
|
||
|
|
assert LZ4_NOT_INSTALLED_ERROR in str(exc)
|
||
|
|
else:
|
||
|
|
raise
|
||
|
|
else:
|
||
|
|
# Pickle protocol used for writing is too high. We expect a
|
||
|
|
# "unsupported pickle protocol" error message
|
||
|
|
try:
|
||
|
|
numpy_pickle.load(filename)
|
||
|
|
raise AssertionError('Numpy pickle loading should '
|
||
|
|
'have raised a ValueError exception')
|
||
|
|
except ValueError as e:
|
||
|
|
message = 'unsupported pickle protocol: {0}'.format(
|
||
|
|
pickle_writing_protocol)
|
||
|
|
assert message in str(e.args)
|
||
|
|
|
||
|
|
|
||
|
|
@with_numpy
|
||
|
|
def test_joblib_pickle_across_python_versions():
|
||
|
|
# We need to be specific about dtypes in particular endianness
|
||
|
|
# because the pickles can be generated on one architecture and
|
||
|
|
# the tests run on another one. See
|
||
|
|
# https://github.com/joblib/joblib/issues/279.
|
||
|
|
expected_list = [np.arange(5, dtype=np.dtype('<i8')),
|
||
|
|
np.arange(5, dtype=np.dtype('<f8')),
|
||
|
|
np.array([1, 'abc', {'a': 1, 'b': 2}], dtype='O'),
|
||
|
|
# .tostring actually returns bytes and is a
|
||
|
|
# compatibility alias for .tobytes which was
|
||
|
|
# added in 1.9.0
|
||
|
|
np.arange(256, dtype=np.uint8).tostring(),
|
||
|
|
# np.matrix is a subclass of np.ndarray, here we want
|
||
|
|
# to verify this type of object is correctly unpickled
|
||
|
|
# among versions.
|
||
|
|
np.matrix([0, 1, 2], dtype=np.dtype('<i8')),
|
||
|
|
u"C'est l'\xe9t\xe9 !"]
|
||
|
|
|
||
|
|
# Testing all the compressed and non compressed
|
||
|
|
# pickles in joblib/test/data. These pickles were generated by
|
||
|
|
# the joblib/test/data/create_numpy_pickle.py script for the
|
||
|
|
# relevant python, joblib and numpy versions.
|
||
|
|
test_data_dir = os.path.dirname(os.path.abspath(data.__file__))
|
||
|
|
|
||
|
|
pickle_extensions = ('.pkl', '.gz', '.gzip', '.bz2', '.xz', '.lzma', 'lz4')
|
||
|
|
pickle_filenames = [os.path.join(test_data_dir, fn)
|
||
|
|
for fn in os.listdir(test_data_dir)
|
||
|
|
if any(fn.endswith(ext) for ext in pickle_extensions)]
|
||
|
|
|
||
|
|
for fname in pickle_filenames:
|
||
|
|
_check_pickle(fname, expected_list)
|
||
|
|
|
||
|
|
|
||
|
|
@parametrize('compress_tuple', [('zlib', 3), ('gzip', 3)])
|
||
|
|
def test_compress_tuple_argument(tmpdir, compress_tuple):
|
||
|
|
# Verify the tuple is correctly taken into account.
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
numpy_pickle.dump("dummy", filename,
|
||
|
|
compress=compress_tuple)
|
||
|
|
# Verify the file contains the right magic number
|
||
|
|
with open(filename, 'rb') as f:
|
||
|
|
assert _detect_compressor(f) == compress_tuple[0]
|
||
|
|
|
||
|
|
|
||
|
|
@parametrize('compress_tuple,message',
|
||
|
|
[(('zlib', 3, 'extra'), # wrong compress tuple
|
||
|
|
'Compress argument tuple should contain exactly 2 elements'),
|
||
|
|
(('wrong', 3), # wrong compress method
|
||
|
|
'Non valid compression method given: "{}"'.format('wrong')),
|
||
|
|
(('zlib', 'wrong'), # wrong compress level
|
||
|
|
'Non valid compress level given: "{}"'.format('wrong'))])
|
||
|
|
def test_compress_tuple_argument_exception(tmpdir, compress_tuple, message):
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
# Verify setting a wrong compress tuple raises a ValueError.
|
||
|
|
with raises(ValueError) as excinfo:
|
||
|
|
numpy_pickle.dump('dummy', filename, compress=compress_tuple)
|
||
|
|
excinfo.match(message)
|
||
|
|
|
||
|
|
|
||
|
|
@parametrize('compress_string', ['zlib', 'gzip'])
|
||
|
|
def test_compress_string_argument(tmpdir, compress_string):
|
||
|
|
# Verify the string is correctly taken into account.
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
numpy_pickle.dump("dummy", filename,
|
||
|
|
compress=compress_string)
|
||
|
|
# Verify the file contains the right magic number
|
||
|
|
with open(filename, 'rb') as f:
|
||
|
|
assert _detect_compressor(f) == compress_string
|
||
|
|
|
||
|
|
|
||
|
|
@with_numpy
|
||
|
|
@parametrize('compress', [1, 3, 6])
|
||
|
|
@parametrize('cmethod', _COMPRESSORS)
|
||
|
|
def test_joblib_compression_formats(tmpdir, compress, cmethod):
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
objects = (np.ones(shape=(100, 100), dtype='f8'),
|
||
|
|
range(10),
|
||
|
|
{'a': 1, 2: 'b'}, [], (), {}, 0, 1.0)
|
||
|
|
|
||
|
|
dump_filename = filename + "." + cmethod
|
||
|
|
for obj in objects:
|
||
|
|
if not PY3_OR_LATER and cmethod in ('lzma', 'xz', 'lz4'):
|
||
|
|
# Lzma module only available for python >= 3.3
|
||
|
|
msg = "{} compression is only available".format(cmethod)
|
||
|
|
error = NotImplementedError
|
||
|
|
if cmethod == 'lz4':
|
||
|
|
error = ValueError
|
||
|
|
with raises(error) as excinfo:
|
||
|
|
numpy_pickle.dump(obj, dump_filename,
|
||
|
|
compress=(cmethod, compress))
|
||
|
|
excinfo.match(msg)
|
||
|
|
elif cmethod == 'lz4' and with_lz4.args[0]:
|
||
|
|
# Skip the test if lz4 is not installed. We here use the with_lz4
|
||
|
|
# skipif fixture whose argument is True when lz4 is not installed
|
||
|
|
raise SkipTest("lz4 is not installed.")
|
||
|
|
else:
|
||
|
|
numpy_pickle.dump(obj, dump_filename,
|
||
|
|
compress=(cmethod, compress))
|
||
|
|
# Verify the file contains the right magic number
|
||
|
|
with open(dump_filename, 'rb') as f:
|
||
|
|
assert _detect_compressor(f) == cmethod
|
||
|
|
# Verify the reloaded object is correct
|
||
|
|
obj_reloaded = numpy_pickle.load(dump_filename)
|
||
|
|
assert isinstance(obj_reloaded, type(obj))
|
||
|
|
if isinstance(obj, np.ndarray):
|
||
|
|
np.testing.assert_array_equal(obj_reloaded, obj)
|
||
|
|
else:
|
||
|
|
assert obj_reloaded == obj
|
||
|
|
|
||
|
|
|
||
|
|
def _gzip_file_decompress(source_filename, target_filename):
|
||
|
|
"""Decompress a gzip file."""
|
||
|
|
with closing(gzip.GzipFile(source_filename, "rb")) as fo:
|
||
|
|
buf = fo.read()
|
||
|
|
|
||
|
|
with open(target_filename, "wb") as fo:
|
||
|
|
fo.write(buf)
|
||
|
|
|
||
|
|
|
||
|
|
def _zlib_file_decompress(source_filename, target_filename):
|
||
|
|
"""Decompress a zlib file."""
|
||
|
|
with open(source_filename, 'rb') as fo:
|
||
|
|
buf = zlib.decompress(fo.read())
|
||
|
|
|
||
|
|
with open(target_filename, 'wb') as fo:
|
||
|
|
fo.write(buf)
|
||
|
|
|
||
|
|
|
||
|
|
@parametrize('extension,decompress',
|
||
|
|
[('.z', _zlib_file_decompress),
|
||
|
|
('.gz', _gzip_file_decompress)])
|
||
|
|
def test_load_externally_decompressed_files(tmpdir, extension, decompress):
|
||
|
|
# Test that BinaryZlibFile generates valid gzip and zlib compressed files.
|
||
|
|
obj = "a string to persist"
|
||
|
|
filename_raw = tmpdir.join('test.pkl').strpath
|
||
|
|
|
||
|
|
filename_compressed = filename_raw + extension
|
||
|
|
# Use automatic extension detection to compress with the right method.
|
||
|
|
numpy_pickle.dump(obj, filename_compressed)
|
||
|
|
|
||
|
|
# Decompress with the corresponding method
|
||
|
|
decompress(filename_compressed, filename_raw)
|
||
|
|
|
||
|
|
# Test that the uncompressed pickle can be loaded and
|
||
|
|
# that the result is correct.
|
||
|
|
obj_reloaded = numpy_pickle.load(filename_raw)
|
||
|
|
assert obj == obj_reloaded
|
||
|
|
|
||
|
|
|
||
|
|
@parametrize('extension,cmethod',
|
||
|
|
# valid compressor extensions
|
||
|
|
[('.z', 'zlib'),
|
||
|
|
('.gz', 'gzip'),
|
||
|
|
('.bz2', 'bz2'),
|
||
|
|
('.lzma', 'lzma'),
|
||
|
|
('.xz', 'xz'),
|
||
|
|
# invalid compressor extensions
|
||
|
|
('.pkl', 'not-compressed'),
|
||
|
|
('', 'not-compressed')])
|
||
|
|
def test_compression_using_file_extension(tmpdir, extension, cmethod):
|
||
|
|
# test that compression method corresponds to the given filename extension.
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
obj = "object to dump"
|
||
|
|
|
||
|
|
dump_fname = filename + extension
|
||
|
|
if not PY3_OR_LATER and cmethod in ('xz', 'lzma'):
|
||
|
|
# Lzma module only available for python >= 3.3
|
||
|
|
msg = "{} compression is only available".format(cmethod)
|
||
|
|
with raises(NotImplementedError) as excinfo:
|
||
|
|
numpy_pickle.dump(obj, dump_fname)
|
||
|
|
excinfo.match(msg)
|
||
|
|
else:
|
||
|
|
numpy_pickle.dump(obj, dump_fname)
|
||
|
|
# Verify the file contains the right magic number
|
||
|
|
with open(dump_fname, 'rb') as f:
|
||
|
|
assert _detect_compressor(f) == cmethod
|
||
|
|
# Verify the reloaded object is correct
|
||
|
|
obj_reloaded = numpy_pickle.load(dump_fname)
|
||
|
|
assert isinstance(obj_reloaded, type(obj))
|
||
|
|
assert obj_reloaded == obj
|
||
|
|
|
||
|
|
|
||
|
|
@with_numpy
|
||
|
|
def test_file_handle_persistence(tmpdir):
|
||
|
|
objs = [np.random.random((10, 10)),
|
||
|
|
"some data",
|
||
|
|
np.matrix([0, 1, 2])]
|
||
|
|
fobjs = [bz2.BZ2File, gzip.GzipFile]
|
||
|
|
if PY3_OR_LATER:
|
||
|
|
import lzma
|
||
|
|
fobjs += [lzma.LZMAFile]
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
|
||
|
|
for obj in objs:
|
||
|
|
for fobj in fobjs:
|
||
|
|
with fobj(filename, 'wb') as f:
|
||
|
|
numpy_pickle.dump(obj, f)
|
||
|
|
|
||
|
|
# using the same decompressor prevents from internally
|
||
|
|
# decompress again.
|
||
|
|
with fobj(filename, 'rb') as f:
|
||
|
|
obj_reloaded = numpy_pickle.load(f)
|
||
|
|
|
||
|
|
# when needed, the correct decompressor should be used when
|
||
|
|
# passing a raw file handle.
|
||
|
|
with open(filename, 'rb') as f:
|
||
|
|
obj_reloaded_2 = numpy_pickle.load(f)
|
||
|
|
|
||
|
|
if isinstance(obj, np.ndarray):
|
||
|
|
np.testing.assert_array_equal(obj_reloaded, obj)
|
||
|
|
np.testing.assert_array_equal(obj_reloaded_2, obj)
|
||
|
|
else:
|
||
|
|
assert obj_reloaded == obj
|
||
|
|
assert obj_reloaded_2 == obj
|
||
|
|
|
||
|
|
|
||
|
|
@with_numpy
|
||
|
|
def test_in_memory_persistence():
|
||
|
|
objs = [np.random.random((10, 10)),
|
||
|
|
"some data",
|
||
|
|
np.matrix([0, 1, 2])]
|
||
|
|
for obj in objs:
|
||
|
|
f = io.BytesIO()
|
||
|
|
numpy_pickle.dump(obj, f)
|
||
|
|
obj_reloaded = numpy_pickle.load(f)
|
||
|
|
if isinstance(obj, np.ndarray):
|
||
|
|
np.testing.assert_array_equal(obj_reloaded, obj)
|
||
|
|
else:
|
||
|
|
assert obj_reloaded == obj
|
||
|
|
|
||
|
|
|
||
|
|
@with_numpy
|
||
|
|
def test_file_handle_persistence_mmap(tmpdir):
|
||
|
|
obj = np.random.random((10, 10))
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
|
||
|
|
with open(filename, 'wb') as f:
|
||
|
|
numpy_pickle.dump(obj, f)
|
||
|
|
|
||
|
|
with open(filename, 'rb') as f:
|
||
|
|
obj_reloaded = numpy_pickle.load(f, mmap_mode='r+')
|
||
|
|
|
||
|
|
np.testing.assert_array_equal(obj_reloaded, obj)
|
||
|
|
|
||
|
|
|
||
|
|
@with_numpy
|
||
|
|
def test_file_handle_persistence_compressed_mmap(tmpdir):
|
||
|
|
obj = np.random.random((10, 10))
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
|
||
|
|
with open(filename, 'wb') as f:
|
||
|
|
numpy_pickle.dump(obj, f, compress=('gzip', 3))
|
||
|
|
|
||
|
|
with closing(gzip.GzipFile(filename, 'rb')) as f:
|
||
|
|
with warns(UserWarning) as warninfo:
|
||
|
|
numpy_pickle.load(f, mmap_mode='r+')
|
||
|
|
assert len(warninfo) == 1
|
||
|
|
assert (str(warninfo[0].message) ==
|
||
|
|
'"%(fileobj)r" is not a raw file, mmap_mode "%(mmap_mode)s" '
|
||
|
|
'flag will be ignored.' % {'fileobj': f, 'mmap_mode': 'r+'})
|
||
|
|
|
||
|
|
|
||
|
|
@with_numpy
|
||
|
|
def test_file_handle_persistence_in_memory_mmap():
|
||
|
|
obj = np.random.random((10, 10))
|
||
|
|
buf = io.BytesIO()
|
||
|
|
|
||
|
|
numpy_pickle.dump(obj, buf)
|
||
|
|
|
||
|
|
with warns(UserWarning) as warninfo:
|
||
|
|
numpy_pickle.load(buf, mmap_mode='r+')
|
||
|
|
assert len(warninfo) == 1
|
||
|
|
assert (str(warninfo[0].message) ==
|
||
|
|
'In memory persistence is not compatible with mmap_mode '
|
||
|
|
'"%(mmap_mode)s" flag passed. mmap_mode option will be '
|
||
|
|
'ignored.' % {'mmap_mode': 'r+'})
|
||
|
|
|
||
|
|
|
||
|
|
@parametrize('data', [b'a little data as bytes.',
|
||
|
|
# More bytes
|
||
|
|
10000 * "{}".format(
|
||
|
|
random.randint(0, 1000) * 1000).encode('latin-1')],
|
||
|
|
ids=["a little data as bytes.", "a large data as bytes."])
|
||
|
|
@parametrize('compress_level', [1, 3, 9])
|
||
|
|
def test_binary_zlibfile(tmpdir, data, compress_level):
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
# Regular cases
|
||
|
|
with open(filename, 'wb') as f:
|
||
|
|
with BinaryZlibFile(f, 'wb',
|
||
|
|
compresslevel=compress_level) as fz:
|
||
|
|
assert fz.writable()
|
||
|
|
fz.write(data)
|
||
|
|
assert fz.fileno() == f.fileno()
|
||
|
|
with raises(io.UnsupportedOperation):
|
||
|
|
fz._check_can_read()
|
||
|
|
|
||
|
|
with raises(io.UnsupportedOperation):
|
||
|
|
fz._check_can_seek()
|
||
|
|
assert fz.closed
|
||
|
|
with raises(ValueError):
|
||
|
|
fz._check_not_closed()
|
||
|
|
|
||
|
|
with open(filename, 'rb') as f:
|
||
|
|
with BinaryZlibFile(f) as fz:
|
||
|
|
assert fz.readable()
|
||
|
|
if PY3_OR_LATER:
|
||
|
|
assert fz.seekable()
|
||
|
|
assert fz.fileno() == f.fileno()
|
||
|
|
assert fz.read() == data
|
||
|
|
with raises(io.UnsupportedOperation):
|
||
|
|
fz._check_can_write()
|
||
|
|
if PY3_OR_LATER:
|
||
|
|
# io.BufferedIOBase doesn't have seekable() method in
|
||
|
|
# python 2
|
||
|
|
assert fz.seekable()
|
||
|
|
fz.seek(0)
|
||
|
|
assert fz.tell() == 0
|
||
|
|
assert fz.closed
|
||
|
|
|
||
|
|
# Test with a filename as input
|
||
|
|
with BinaryZlibFile(filename, 'wb',
|
||
|
|
compresslevel=compress_level) as fz:
|
||
|
|
assert fz.writable()
|
||
|
|
fz.write(data)
|
||
|
|
|
||
|
|
with BinaryZlibFile(filename, 'rb') as fz:
|
||
|
|
assert fz.read() == data
|
||
|
|
assert fz.seekable()
|
||
|
|
|
||
|
|
# Test without context manager
|
||
|
|
fz = BinaryZlibFile(filename, 'wb', compresslevel=compress_level)
|
||
|
|
assert fz.writable()
|
||
|
|
fz.write(data)
|
||
|
|
fz.close()
|
||
|
|
|
||
|
|
fz = BinaryZlibFile(filename, 'rb')
|
||
|
|
assert fz.read() == data
|
||
|
|
fz.close()
|
||
|
|
|
||
|
|
|
||
|
|
@parametrize('bad_value', [-1, 10, 15, 'a', (), {}])
|
||
|
|
def test_binary_zlibfile_bad_compression_levels(tmpdir, bad_value):
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
with raises(ValueError) as excinfo:
|
||
|
|
BinaryZlibFile(filename, 'wb', compresslevel=bad_value)
|
||
|
|
pattern = re.escape("'compresslevel' must be an integer between 1 and 9. "
|
||
|
|
"You provided 'compresslevel={}'".format(bad_value))
|
||
|
|
excinfo.match(pattern)
|
||
|
|
|
||
|
|
|
||
|
|
@parametrize('bad_mode', ['a', 'x', 'r', 'w', 1, 2])
|
||
|
|
def test_binary_zlibfile_invalid_modes(tmpdir, bad_mode):
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
with raises(ValueError) as excinfo:
|
||
|
|
BinaryZlibFile(filename, bad_mode)
|
||
|
|
excinfo.match("Invalid mode")
|
||
|
|
|
||
|
|
|
||
|
|
@parametrize('bad_file', [1, (), {}])
|
||
|
|
def test_binary_zlibfile_invalid_filename_type(bad_file):
|
||
|
|
with raises(TypeError) as excinfo:
|
||
|
|
BinaryZlibFile(bad_file, 'rb')
|
||
|
|
excinfo.match("filename must be a str or bytes object, or a file")
|
||
|
|
|
||
|
|
|
||
|
|
###############################################################################
|
||
|
|
# Test dumping array subclasses
|
||
|
|
if np is not None:
|
||
|
|
|
||
|
|
class SubArray(np.ndarray):
|
||
|
|
|
||
|
|
def __reduce__(self):
|
||
|
|
return _load_sub_array, (np.asarray(self), )
|
||
|
|
|
||
|
|
def _load_sub_array(arr):
|
||
|
|
d = SubArray(arr.shape)
|
||
|
|
d[:] = arr
|
||
|
|
return d
|
||
|
|
|
||
|
|
class ComplexTestObject:
|
||
|
|
"""A complex object containing numpy arrays as attributes."""
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
self.array_float = np.arange(100, dtype='float64')
|
||
|
|
self.array_int = np.ones(100, dtype='int32')
|
||
|
|
self.array_obj = np.array(['a', 10, 20.0], dtype='object')
|
||
|
|
|
||
|
|
|
||
|
|
@with_numpy
|
||
|
|
def test_numpy_subclass(tmpdir):
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
a = SubArray((10,))
|
||
|
|
numpy_pickle.dump(a, filename)
|
||
|
|
c = numpy_pickle.load(filename)
|
||
|
|
assert isinstance(c, SubArray)
|
||
|
|
np.testing.assert_array_equal(c, a)
|
||
|
|
|
||
|
|
|
||
|
|
def test_pathlib(tmpdir):
|
||
|
|
try:
|
||
|
|
from pathlib import Path
|
||
|
|
except ImportError:
|
||
|
|
pass
|
||
|
|
else:
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
value = 123
|
||
|
|
numpy_pickle.dump(value, Path(filename))
|
||
|
|
assert numpy_pickle.load(filename) == value
|
||
|
|
numpy_pickle.dump(value, filename)
|
||
|
|
assert numpy_pickle.load(Path(filename)) == value
|
||
|
|
|
||
|
|
|
||
|
|
@with_numpy
|
||
|
|
def test_non_contiguous_array_pickling(tmpdir):
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
|
||
|
|
for array in [ # Array that triggers a contiguousness issue with nditer,
|
||
|
|
# see https://github.com/joblib/joblib/pull/352 and see
|
||
|
|
# https://github.com/joblib/joblib/pull/353
|
||
|
|
np.asfortranarray([[1, 2], [3, 4]])[1:],
|
||
|
|
# Non contiguous array with works fine with nditer
|
||
|
|
np.ones((10, 50, 20), order='F')[:, :1, :]]:
|
||
|
|
assert not array.flags.c_contiguous
|
||
|
|
assert not array.flags.f_contiguous
|
||
|
|
numpy_pickle.dump(array, filename)
|
||
|
|
array_reloaded = numpy_pickle.load(filename)
|
||
|
|
np.testing.assert_array_equal(array_reloaded, array)
|
||
|
|
|
||
|
|
|
||
|
|
@with_numpy
|
||
|
|
def test_pickle_highest_protocol(tmpdir):
|
||
|
|
# ensure persistence of a numpy array is valid even when using
|
||
|
|
# the pickle HIGHEST_PROTOCOL.
|
||
|
|
# see https://github.com/joblib/joblib/issues/362
|
||
|
|
|
||
|
|
filename = tmpdir.join('test.pkl').strpath
|
||
|
|
test_array = np.zeros(10)
|
||
|
|
|
||
|
|
numpy_pickle.dump(test_array, filename, protocol=pickle.HIGHEST_PROTOCOL)
|
||
|
|
array_reloaded = numpy_pickle.load(filename)
|
||
|
|
|
||
|
|
np.testing.assert_array_equal(array_reloaded, test_array)
|
||
|
|
|
||
|
|
|
||
|
|
@with_numpy
|
||
|
|
def test_pickle_in_socket():
|
||
|
|
# test that joblib can pickle in sockets
|
||
|
|
if not PY3_OR_LATER:
|
||
|
|
raise SkipTest("Cannot peek or seek in socket in python 2.")
|
||
|
|
|
||
|
|
test_array = np.arange(10)
|
||
|
|
_ADDR = ("localhost", 12345)
|
||
|
|
listener = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
|
||
|
|
listener.bind(_ADDR)
|
||
|
|
listener.listen(1)
|
||
|
|
|
||
|
|
client = socket.create_connection(_ADDR)
|
||
|
|
server, client_addr = listener.accept()
|
||
|
|
|
||
|
|
with server.makefile("wb") as sf:
|
||
|
|
numpy_pickle.dump(test_array, sf)
|
||
|
|
|
||
|
|
with client.makefile("rb") as cf:
|
||
|
|
array_reloaded = numpy_pickle.load(cf)
|
||
|
|
|
||
|
|
np.testing.assert_array_equal(array_reloaded, test_array)
|
||
|
|
|
||
|
|
|
||
|
|
@with_numpy
|
||
|
|
def test_load_memmap_with_big_offset(tmpdir):
|
||
|
|
# Test that numpy memmap offset is set correctly if greater than
|
||
|
|
# mmap.ALLOCATIONGRANULARITY, see
|
||
|
|
# https://github.com/joblib/joblib/issues/451 and
|
||
|
|
# https://github.com/numpy/numpy/pull/8443 for more details.
|
||
|
|
fname = tmpdir.join('test.mmap').strpath
|
||
|
|
size = mmap.ALLOCATIONGRANULARITY
|
||
|
|
obj = [np.zeros(size, dtype='uint8'), np.ones(size, dtype='uint8')]
|
||
|
|
numpy_pickle.dump(obj, fname)
|
||
|
|
memmaps = numpy_pickle.load(fname, mmap_mode='r')
|
||
|
|
assert isinstance(memmaps[1], np.memmap)
|
||
|
|
assert memmaps[1].offset > size
|
||
|
|
np.testing.assert_array_equal(obj, memmaps)
|
||
|
|
|
||
|
|
|
||
|
|
def test_register_compressor(tmpdir):
|
||
|
|
# Check that registering compressor file works.
|
||
|
|
compressor_name = 'test-name'
|
||
|
|
compressor_prefix = 'test-prefix'
|
||
|
|
|
||
|
|
class BinaryCompressorTestFile(io.BufferedIOBase):
|
||
|
|
pass
|
||
|
|
|
||
|
|
class BinaryCompressorTestWrapper(CompressorWrapper):
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
CompressorWrapper.__init__(self, obj=BinaryCompressorTestFile,
|
||
|
|
prefix=compressor_prefix)
|
||
|
|
|
||
|
|
register_compressor(compressor_name, BinaryCompressorTestWrapper())
|
||
|
|
|
||
|
|
assert (_COMPRESSORS[compressor_name].fileobj_factory ==
|
||
|
|
BinaryCompressorTestFile)
|
||
|
|
assert _COMPRESSORS[compressor_name].prefix == compressor_prefix
|
||
|
|
|
||
|
|
# Remove this dummy compressor file from extra compressors because other
|
||
|
|
# tests might fail because of this
|
||
|
|
_COMPRESSORS.pop(compressor_name)
|
||
|
|
|
||
|
|
|
||
|
|
@parametrize('invalid_name', [1, (), {}])
|
||
|
|
def test_register_compressor_invalid_name(invalid_name):
|
||
|
|
# Test that registering an invalid compressor name is not allowed.
|
||
|
|
with raises(ValueError) as excinfo:
|
||
|
|
register_compressor(invalid_name, None)
|
||
|
|
excinfo.match("Compressor name should be a string")
|
||
|
|
|
||
|
|
|
||
|
|
def test_register_compressor_invalid_fileobj():
|
||
|
|
# Test that registering an invalid file object is not allowed.
|
||
|
|
|
||
|
|
class InvalidFileObject():
|
||
|
|
pass
|
||
|
|
|
||
|
|
class InvalidFileObjectWrapper(CompressorWrapper):
|
||
|
|
def __init__(self):
|
||
|
|
CompressorWrapper.__init__(self, obj=InvalidFileObject,
|
||
|
|
prefix=b'prefix')
|
||
|
|
|
||
|
|
with raises(ValueError) as excinfo:
|
||
|
|
register_compressor('invalid', InvalidFileObjectWrapper())
|
||
|
|
|
||
|
|
excinfo.match("Compressor 'fileobj_factory' attribute should implement "
|
||
|
|
"the file object interface")
|
||
|
|
|
||
|
|
|
||
|
|
class AnotherZlibCompressorWrapper(CompressorWrapper):
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
CompressorWrapper.__init__(self, obj=BinaryZlibFile, prefix=b'prefix')
|
||
|
|
|
||
|
|
|
||
|
|
class StandardLibGzipCompressorWrapper(CompressorWrapper):
|
||
|
|
|
||
|
|
def __init__(self):
|
||
|
|
CompressorWrapper.__init__(self, obj=gzip.GzipFile, prefix=b'prefix')
|
||
|
|
|
||
|
|
|
||
|
|
def test_register_compressor_already_registered():
|
||
|
|
# Test registration of existing compressor files.
|
||
|
|
compressor_name = 'test-name'
|
||
|
|
|
||
|
|
# register a test compressor
|
||
|
|
register_compressor(compressor_name, AnotherZlibCompressorWrapper())
|
||
|
|
|
||
|
|
with raises(ValueError) as excinfo:
|
||
|
|
register_compressor(compressor_name,
|
||
|
|
StandardLibGzipCompressorWrapper())
|
||
|
|
excinfo.match("Compressor '{}' already registered."
|
||
|
|
.format(compressor_name))
|
||
|
|
|
||
|
|
register_compressor(compressor_name, StandardLibGzipCompressorWrapper(),
|
||
|
|
force=True)
|
||
|
|
|
||
|
|
assert compressor_name in _COMPRESSORS
|
||
|
|
assert _COMPRESSORS[compressor_name].fileobj_factory == gzip.GzipFile
|
||
|
|
|
||
|
|
# Remove this dummy compressor file from extra compressors because other
|
||
|
|
# tests might fail because of this
|
||
|
|
_COMPRESSORS.pop(compressor_name)
|
||
|
|
|
||
|
|
|
||
|
|
@with_lz4
|
||
|
|
def test_lz4_compression(tmpdir):
|
||
|
|
# Check that lz4 can be used when dependency is available.
|
||
|
|
import lz4.frame
|
||
|
|
compressor = 'lz4'
|
||
|
|
assert compressor in _COMPRESSORS
|
||
|
|
assert _COMPRESSORS[compressor].fileobj_factory == lz4.frame.LZ4FrameFile
|
||
|
|
|
||
|
|
fname = tmpdir.join('test.pkl').strpath
|
||
|
|
data = 'test data'
|
||
|
|
numpy_pickle.dump(data, fname, compress=compressor)
|
||
|
|
|
||
|
|
with open(fname, 'rb') as f:
|
||
|
|
assert f.read(len(_LZ4_PREFIX)) == _LZ4_PREFIX
|
||
|
|
assert numpy_pickle.load(fname) == data
|
||
|
|
|
||
|
|
# Test that LZ4 is applied based on file extension
|
||
|
|
numpy_pickle.dump(data, fname + '.lz4')
|
||
|
|
with open(fname, 'rb') as f:
|
||
|
|
assert f.read(len(_LZ4_PREFIX)) == _LZ4_PREFIX
|
||
|
|
assert numpy_pickle.load(fname) == data
|
||
|
|
|
||
|
|
|
||
|
|
@without_lz4
|
||
|
|
def test_lz4_compression_without_lz4(tmpdir):
|
||
|
|
# Check that lz4 cannot be used when dependency is not available.
|
||
|
|
fname = tmpdir.join('test.nolz4').strpath
|
||
|
|
data = 'test data'
|
||
|
|
msg = LZ4_NOT_INSTALLED_ERROR
|
||
|
|
if not PY3_OR_LATER:
|
||
|
|
msg = "lz4 compression is only available with python3+"
|
||
|
|
with raises(ValueError) as excinfo:
|
||
|
|
numpy_pickle.dump(data, fname, compress='lz4')
|
||
|
|
excinfo.match(msg)
|
||
|
|
|
||
|
|
with raises(ValueError) as excinfo:
|
||
|
|
numpy_pickle.dump(data, fname + '.lz4')
|
||
|
|
excinfo.match(msg)
|