Python Version.__cmp__方法代碼示例

# 需要導入模塊: from twisted.python.versions import Version [as 別名]
# 或者: from twisted.python.versions.Version import __cmp__ [as 別名]
 def test_notImplementedComparisons(self):
     """
     Comparing a L{Version} to some other object type results in
     C{NotImplemented}.
     """
     va = Version("dummy", 1, 0, 0)
     vb = ("dummy", 1, 0, 0) # a tuple is not a Version object
     self.assertEqual(va.__cmp__(vb), NotImplemented)

# 需要導入模塊: from twisted.python.versions import Version [as 別名]
# 或者: from twisted.python.versions.Version import __cmp__ [as 別名]
class AppVersion(Entity):
    """Track application versions"""
    implements(IDroneModelAppVersion)
    description = property( lambda self: "%s %s" % \
            (self.app.name, self.version_string) )
    serializable = True

    def __getattribute__(self, name):
        """Overrode to fulfill Interface Obligations"""
        if name in ('package','major','minor','micro','prerelease','base',\
                'short'):
            return self.version.__getattribute__(name)
        return object.__getattribute__(self, name)

    def __init__(self, *args, **kwargs):
        self.version = Version(*args, **kwargs)
        self.app = IDroneModelApp(self.version)

    @property
    def version_string(self):
        """makes a nice version string that we can use for reconstruction"""
        result = '.'.join([
            str(self.major),
            str(self.minor),
            str(self.micro),
        ])
        if self.prerelease:
            result += '.%s' % str(self.prerelease)
        return result

    def __getstate__(self):
        return {
            'app' : self.package,
            'version' : self.version_string, #for proper serialization
        }

    def __cmp__(self, other):
        """overrode for easy comparison of AppVersion to AppVersion and Version
           to AppVersion.

           @raise IncomparableVersions:  when the package names of the versions
               differ.
           @param other L{twisted.python.versions.Version}, 
               L{IDroneModelAppVersion}, or object
           @return C{int} of value -1, 0, or 1
        """
        try:
            if IDroneModelAppVersion.providedBy(other):
                return self.version.__cmp__(other.version)
        except IncomparableVersions: raise
        except: pass
        if isinstance(other, Version):
            return self.version.__cmp__(other)
        return object.__cmp__(self, other)

    @staticmethod
    def makeAppVersion(name, version):
        """Similar to ``makeArgs``

           @return L{IDroneModelAppVersion} provider
        """
        args, kwargs = AppVersion.makeArgs(name, version)
        return AppVersion(*args, **kwargs)

    @staticmethod
    def makeVersion(name, version):
        """Similar to ``makeArgs``

           @return L{twisted.python.versions.Version}
        """
        args, kwargs = AppVersion.makeArgs(name, version)
        return Version(*args, **kwargs)

    @staticmethod
    def versionExists(name, version):
        """check if this L{IDroneModelAppVersion} provider exists"""
        args, kwargs = AppVersion.makeArgs(name, version)
        return AppVersion.exists(*args, **kwargs)

    @staticmethod
    def makeArgs(name, version):
        """goes through great lengths to make args for use
           by a constructor for class types -
               L{IDroneModelAppVersion} providers or 
               L{twisted.python.versions.Version}.

           @raises TypeError - if version is not convertable

           @param name C{str}
           @param version C{str}, C{list}, C{tuple}, or 
               L{twisted.python.versions.Version}

           @return ((name, major, minor, micro), {'prerelease': prerelease})
        """
        default = [0,0,0,0] #last number denotes pre-release
        if isinstance(version, Version):
            if version.package == name:
                return (
                    (name, version.major, version.minor, version.micro),
                    {'prerelease': version.prerelease}
#.........這裏部分代碼省略.........