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156 lines
4.7 KiB
Python
156 lines
4.7 KiB
Python
"""Utility to compare (Numpy) version strings.
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The NumpyVersion class allows properly comparing numpy version strings.
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The LooseVersion and StrictVersion classes that distutils provides don't
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work; they don't recognize anything like alpha/beta/rc/dev versions.
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"""
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import re
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from scipy._lib.six import string_types
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__all__ = ['NumpyVersion']
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class NumpyVersion():
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"""Parse and compare numpy version strings.
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Numpy has the following versioning scheme (numbers given are examples; they
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can be >9) in principle):
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- Released version: '1.8.0', '1.8.1', etc.
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- Alpha: '1.8.0a1', '1.8.0a2', etc.
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- Beta: '1.8.0b1', '1.8.0b2', etc.
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- Release candidates: '1.8.0rc1', '1.8.0rc2', etc.
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- Development versions: '1.8.0.dev-f1234afa' (git commit hash appended)
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- Development versions after a1: '1.8.0a1.dev-f1234afa',
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'1.8.0b2.dev-f1234afa',
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'1.8.1rc1.dev-f1234afa', etc.
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- Development versions (no git hash available): '1.8.0.dev-Unknown'
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Comparing needs to be done against a valid version string or other
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`NumpyVersion` instance.
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Parameters
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----------
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vstring : str
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Numpy version string (``np.__version__``).
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Notes
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-----
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All dev versions of the same (pre-)release compare equal.
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Examples
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--------
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>>> from scipy._lib._version import NumpyVersion
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>>> if NumpyVersion(np.__version__) < '1.7.0':
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... print('skip')
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skip
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>>> NumpyVersion('1.7') # raises ValueError, add ".0"
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"""
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def __init__(self, vstring):
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self.vstring = vstring
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ver_main = re.match(r'\d[.]\d+[.]\d+', vstring)
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if not ver_main:
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raise ValueError("Not a valid numpy version string")
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self.version = ver_main.group()
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self.major, self.minor, self.bugfix = [int(x) for x in
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self.version.split('.')]
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if len(vstring) == ver_main.end():
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self.pre_release = 'final'
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else:
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alpha = re.match(r'a\d', vstring[ver_main.end():])
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beta = re.match(r'b\d', vstring[ver_main.end():])
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rc = re.match(r'rc\d', vstring[ver_main.end():])
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pre_rel = [m for m in [alpha, beta, rc] if m is not None]
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if pre_rel:
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self.pre_release = pre_rel[0].group()
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else:
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self.pre_release = ''
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self.is_devversion = bool(re.search(r'.dev', vstring))
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def _compare_version(self, other):
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"""Compare major.minor.bugfix"""
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if self.major == other.major:
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if self.minor == other.minor:
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if self.bugfix == other.bugfix:
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vercmp = 0
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elif self.bugfix > other.bugfix:
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vercmp = 1
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else:
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vercmp = -1
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elif self.minor > other.minor:
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vercmp = 1
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else:
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vercmp = -1
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elif self.major > other.major:
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vercmp = 1
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else:
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vercmp = -1
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return vercmp
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def _compare_pre_release(self, other):
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"""Compare alpha/beta/rc/final."""
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if self.pre_release == other.pre_release:
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vercmp = 0
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elif self.pre_release == 'final':
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vercmp = 1
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elif other.pre_release == 'final':
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vercmp = -1
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elif self.pre_release > other.pre_release:
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vercmp = 1
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else:
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vercmp = -1
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return vercmp
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def _compare(self, other):
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if not isinstance(other, (string_types, NumpyVersion)):
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raise ValueError("Invalid object to compare with NumpyVersion.")
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if isinstance(other, string_types):
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other = NumpyVersion(other)
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vercmp = self._compare_version(other)
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if vercmp == 0:
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# Same x.y.z version, check for alpha/beta/rc
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vercmp = self._compare_pre_release(other)
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if vercmp == 0:
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# Same version and same pre-release, check if dev version
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if self.is_devversion is other.is_devversion:
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vercmp = 0
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elif self.is_devversion:
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vercmp = -1
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else:
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vercmp = 1
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return vercmp
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def __lt__(self, other):
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return self._compare(other) < 0
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def __le__(self, other):
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return self._compare(other) <= 0
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def __eq__(self, other):
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return self._compare(other) == 0
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def __ne__(self, other):
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return self._compare(other) != 0
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def __gt__(self, other):
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return self._compare(other) > 0
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def __ge__(self, other):
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return self._compare(other) >= 0
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def __repr__(self):
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return "NumpyVersion(%s)" % self.vstring
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