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157 lines
5.0 KiB
Python
157 lines
5.0 KiB
Python
"""
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Helpers for logging.
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This module needs much love to become useful.
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"""
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# Author: Gael Varoquaux <gael dot varoquaux at normalesup dot org>
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# Copyright (c) 2008 Gael Varoquaux
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# License: BSD Style, 3 clauses.
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from __future__ import print_function
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import time
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import sys
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import os
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import shutil
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import logging
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import pprint
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from .disk import mkdirp
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def _squeeze_time(t):
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"""Remove .1s to the time under Windows: this is the time it take to
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stat files. This is needed to make results similar to timings under
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Unix, for tests
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"""
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if sys.platform.startswith('win'):
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return max(0, t - .1)
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else:
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return t
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def format_time(t):
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t = _squeeze_time(t)
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return "%.1fs, %.1fmin" % (t, t / 60.)
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def short_format_time(t):
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t = _squeeze_time(t)
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if t > 60:
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return "%4.1fmin" % (t / 60.)
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else:
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return " %5.1fs" % (t)
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def pformat(obj, indent=0, depth=3):
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if 'numpy' in sys.modules:
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import numpy as np
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print_options = np.get_printoptions()
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np.set_printoptions(precision=6, threshold=64, edgeitems=1)
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else:
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print_options = None
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out = pprint.pformat(obj, depth=depth, indent=indent)
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if print_options:
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np.set_printoptions(**print_options)
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return out
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###############################################################################
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# class `Logger`
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###############################################################################
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class Logger(object):
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""" Base class for logging messages.
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"""
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def __init__(self, depth=3):
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"""
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Parameters
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----------
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depth: int, optional
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The depth of objects printed.
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"""
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self.depth = depth
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def warn(self, msg):
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logging.warning("[%s]: %s" % (self, msg))
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def debug(self, msg):
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# XXX: This conflicts with the debug flag used in children class
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logging.debug("[%s]: %s" % (self, msg))
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def format(self, obj, indent=0):
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"""Return the formatted representation of the object."""
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return pformat(obj, indent=indent, depth=self.depth)
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###############################################################################
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# class `PrintTime`
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###############################################################################
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class PrintTime(object):
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""" Print and log messages while keeping track of time.
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"""
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def __init__(self, logfile=None, logdir=None):
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if logfile is not None and logdir is not None:
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raise ValueError('Cannot specify both logfile and logdir')
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# XXX: Need argument docstring
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self.last_time = time.time()
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self.start_time = self.last_time
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if logdir is not None:
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logfile = os.path.join(logdir, 'joblib.log')
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self.logfile = logfile
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if logfile is not None:
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mkdirp(os.path.dirname(logfile))
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if os.path.exists(logfile):
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# Rotate the logs
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for i in range(1, 9):
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try:
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shutil.move(logfile + '.%i' % i,
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logfile + '.%i' % (i + 1))
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except:
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"No reason failing here"
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# Use a copy rather than a move, so that a process
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# monitoring this file does not get lost.
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try:
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shutil.copy(logfile, logfile + '.1')
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except:
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"No reason failing here"
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try:
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with open(logfile, 'w') as logfile:
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logfile.write('\nLogging joblib python script\n')
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logfile.write('\n---%s---\n' % time.ctime(self.last_time))
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except:
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""" Multiprocessing writing to files can create race
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conditions. Rather fail silently than crash the
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computation.
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"""
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# XXX: We actually need a debug flag to disable this
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# silent failure.
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def __call__(self, msg='', total=False):
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""" Print the time elapsed between the last call and the current
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call, with an optional message.
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"""
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if not total:
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time_lapse = time.time() - self.last_time
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full_msg = "%s: %s" % (msg, format_time(time_lapse))
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else:
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# FIXME: Too much logic duplicated
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time_lapse = time.time() - self.start_time
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full_msg = "%s: %.2fs, %.1f min" % (msg, time_lapse,
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time_lapse / 60)
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print(full_msg, file=sys.stderr)
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if self.logfile is not None:
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try:
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with open(self.logfile, 'a') as f:
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print(full_msg, file=f)
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except:
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""" Multiprocessing writing to files can create race
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conditions. Rather fail silently than crash the
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calculation.
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"""
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# XXX: We actually need a debug flag to disable this
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# silent failure.
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self.last_time = time.time()
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