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"""Utility to compare (NumPy) version strings.
The NumpyVersion class allows properly comparing numpy version strings.
The LooseVersion and StrictVersion classes that distutils provides don't
work; they don't recognize anything like alpha/beta/rc/dev versions.
"""
import re
__all__ = ['NumpyVersion']
class NumpyVersion():
"""Parse and compare numpy version strings.
NumPy has the following versioning scheme (numbers given are examples; they
can be > 9 in principle):
- Released version: '1.8.0', '1.8.1', etc.
- Alpha: '1.8.0a1', '1.8.0a2', etc.
- Beta: '1.8.0b1', '1.8.0b2', etc.
- Release candidates: '1.8.0rc1', '1.8.0rc2', etc.
- Development versions: '1.8.0.dev-f1234afa' (git commit hash appended)
- Development versions after a1: '1.8.0a1.dev-f1234afa',
'1.8.0b2.dev-f1234afa',
'1.8.1rc1.dev-f1234afa', etc.
- Development versions (no git hash available): '1.8.0.dev-Unknown'
Comparing needs to be done against a valid version string or other
`NumpyVersion` instance. Note that all development versions of the same
(pre-)release compare equal.
.. versionadded:: 1.9.0
Parameters
----------
vstring : str
NumPy version string (``np.__version__``).
Examples
--------
>>> from numpy.lib import NumpyVersion
>>> if NumpyVersion(np.__version__) < '1.7.0':
... print('skip')
>>> # skip
>>> NumpyVersion('1.7') # raises ValueError, add ".0"
Traceback (most recent call last):
...
ValueError: Not a valid numpy version string
"""
def __init__(self, vstring):
self.vstring = vstring
ver_main = re.match(r'\d+\.\d+\.\d+', vstring)
if not ver_main:
raise ValueError("Not a valid numpy version string")
self.version = ver_main.group()
self.major, self.minor, self.bugfix = [int(x) for x in
self.version.split('.')]
if len(vstring) == ver_main.end():
self.pre_release = 'final'
else:
alpha = re.match(r'a\d', vstring[ver_main.end():])
beta = re.match(r'b\d', vstring[ver_main.end():])
rc = re.match(r'rc\d', vstring[ver_main.end():])
pre_rel = [m for m in [alpha, beta, rc] if m is not None]
if pre_rel:
self.pre_release = pre_rel[0].group()
else:
self.pre_release = ''
self.is_devversion = bool(re.search(r'.dev', vstring))
def _compare_version(self, other):
"""Compare major.minor.bugfix"""
if self.major == other.major:
if self.minor == other.minor:
if self.bugfix == other.bugfix:
vercmp = 0
elif self.bugfix > other.bugfix:
vercmp = 1
else:
vercmp = -1
elif self.minor > other.minor:
vercmp = 1
else:
vercmp = -1
elif self.major > other.major:
vercmp = 1
else:
vercmp = -1
return vercmp
def _compare_pre_release(self, other):
"""Compare alpha/beta/rc/final."""
if self.pre_release == other.pre_release:
vercmp = 0
elif self.pre_release == 'final':
vercmp = 1
elif other.pre_release == 'final':
vercmp = -1
elif self.pre_release > other.pre_release:
vercmp = 1
else:
vercmp = -1
return vercmp
def _compare(self, other):
if not isinstance(other, (str, NumpyVersion)):
raise ValueError("Invalid object to compare with NumpyVersion.")
if isinstance(other, str):
other = NumpyVersion(other)
vercmp = self._compare_version(other)
if vercmp == 0:
# Same x.y.z version, check for alpha/beta/rc
vercmp = self._compare_pre_release(other)
if vercmp == 0:
# Same version and same pre-release, check if dev version
if self.is_devversion is other.is_devversion:
vercmp = 0
elif self.is_devversion:
vercmp = -1
else:
vercmp = 1
return vercmp
def __lt__(self, other):
return self._compare(other) < 0
def __le__(self, other):
return self._compare(other) <= 0
def __eq__(self, other):
return self._compare(other) == 0
def __ne__(self, other):
return self._compare(other) != 0
def __gt__(self, other):
return self._compare(other) > 0
def __ge__(self, other):
return self._compare(other) >= 0
def __repr__(self):
return "NumpyVersion(%s)" % self.vstring
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