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version_class.py: if you don't have pkg_resources for comparing version numbers, use distutils.version.LooseVersion

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This commit is contained in:
Zooko O'Whielacronx 2007-08-16 16:16:41 -07:00
parent 8b1e53b248
commit 5a1d4aa8b7
1 changed files with 10 additions and 2 deletions

12
src/allmydata/util/version_class.py

@ -10,7 +10,15 @@ extended version number class
"""
# from setuptools, but intended to be included in future version of Python Standard Library (PEP 365)
import pkg_resources
try:
import pkg_resources
except ImportError:
import distutils.version
def cmp_version(v1, v2):
return cmp(distutils.version.LooseVersion(str(v1)), distutils.version.LooseVersion(str(v2)))
else:
def cmp_version(v1, v2):
return cmp(pkg_resources.parse_version(str(v1)), pkg_resources.parse_version(str(v2)))
# bindann, by Nathan Wilcox (needed only for debugging)
try:
@ -130,4 +138,4 @@ class Version(object):
return self.__str__()
def __cmp__ (self, other):
return cmp(pkg_resources.parse_version(str(self)), pkg_resources.parse_version(str(other)))
return cmp_version(self, other)