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Diffstat (limited to 'external_libs/python/enum34-1.0.4/enum/__init__.py')
| -rw-r--r-- | external_libs/python/enum34-1.0.4/enum/__init__.py | 790 |
1 files changed, 0 insertions, 790 deletions
diff --git a/external_libs/python/enum34-1.0.4/enum/__init__.py b/external_libs/python/enum34-1.0.4/enum/__init__.py deleted file mode 100644 index 6a327a8a..00000000 --- a/external_libs/python/enum34-1.0.4/enum/__init__.py +++ /dev/null @@ -1,790 +0,0 @@ -"""Python Enumerations""" - -import sys as _sys - -__all__ = ['Enum', 'IntEnum', 'unique'] - -version = 1, 0, 4 - -pyver = float('%s.%s' % _sys.version_info[:2]) - -try: - any -except NameError: - def any(iterable): - for element in iterable: - if element: - return True - return False - -try: - from collections import OrderedDict -except ImportError: - OrderedDict = None - -try: - basestring -except NameError: - # In Python 2 basestring is the ancestor of both str and unicode - # in Python 3 it's just str, but was missing in 3.1 - basestring = str - -try: - unicode -except NameError: - # In Python 3 unicode no longer exists (it's just str) - unicode = str - -class _RouteClassAttributeToGetattr(object): - """Route attribute access on a class to __getattr__. - - This is a descriptor, used to define attributes that act differently when - accessed through an instance and through a class. Instance access remains - normal, but access to an attribute through a class will be routed to the - class's __getattr__ method; this is done by raising AttributeError. - - """ - def __init__(self, fget=None): - self.fget = fget - - def __get__(self, instance, ownerclass=None): - if instance is None: - raise AttributeError() - return self.fget(instance) - - def __set__(self, instance, value): - raise AttributeError("can't set attribute") - - def __delete__(self, instance): - raise AttributeError("can't delete attribute") - - -def _is_descriptor(obj): - """Returns True if obj is a descriptor, False otherwise.""" - return ( - hasattr(obj, '__get__') or - hasattr(obj, '__set__') or - hasattr(obj, '__delete__')) - - -def _is_dunder(name): - """Returns True if a __dunder__ name, False otherwise.""" - return (name[:2] == name[-2:] == '__' and - name[2:3] != '_' and - name[-3:-2] != '_' and - len(name) > 4) - - -def _is_sunder(name): - """Returns True if a _sunder_ name, False otherwise.""" - return (name[0] == name[-1] == '_' and - name[1:2] != '_' and - name[-2:-1] != '_' and - len(name) > 2) - - -def _make_class_unpicklable(cls): - """Make the given class un-picklable.""" - def _break_on_call_reduce(self, protocol=None): - raise TypeError('%r cannot be pickled' % self) - cls.__reduce_ex__ = _break_on_call_reduce - cls.__module__ = '<unknown>' - - -class _EnumDict(dict): - """Track enum member order and ensure member names are not reused. - - EnumMeta will use the names found in self._member_names as the - enumeration member names. - - """ - def __init__(self): - super(_EnumDict, self).__init__() - self._member_names = [] - - def __setitem__(self, key, value): - """Changes anything not dundered or not a descriptor. - - If a descriptor is added with the same name as an enum member, the name - is removed from _member_names (this may leave a hole in the numerical - sequence of values). - - If an enum member name is used twice, an error is raised; duplicate - values are not checked for. - - Single underscore (sunder) names are reserved. - - Note: in 3.x __order__ is simply discarded as a not necessary piece - leftover from 2.x - - """ - if pyver >= 3.0 and key == '__order__': - return - if _is_sunder(key): - raise ValueError('_names_ are reserved for future Enum use') - elif _is_dunder(key): - pass - elif key in self._member_names: - # descriptor overwriting an enum? - raise TypeError('Attempted to reuse key: %r' % key) - elif not _is_descriptor(value): - if key in self: - # enum overwriting a descriptor? - raise TypeError('Key already defined as: %r' % self[key]) - self._member_names.append(key) - super(_EnumDict, self).__setitem__(key, value) - - -# Dummy value for Enum as EnumMeta explicity checks for it, but of course until -# EnumMeta finishes running the first time the Enum class doesn't exist. This -# is also why there are checks in EnumMeta like `if Enum is not None` -Enum = None - - -class EnumMeta(type): - """Metaclass for Enum""" - @classmethod - def __prepare__(metacls, cls, bases): - return _EnumDict() - - def __new__(metacls, cls, bases, classdict): - # an Enum class is final once enumeration items have been defined; it - # cannot be mixed with other types (int, float, etc.) if it has an - # inherited __new__ unless a new __new__ is defined (or the resulting - # class will fail). - if type(classdict) is dict: - original_dict = classdict - classdict = _EnumDict() - for k, v in original_dict.items(): - classdict[k] = v - - member_type, first_enum = metacls._get_mixins_(bases) - __new__, save_new, use_args = metacls._find_new_(classdict, member_type, - first_enum) - # save enum items into separate mapping so they don't get baked into - # the new class - members = dict((k, classdict[k]) for k in classdict._member_names) - for name in classdict._member_names: - del classdict[name] - - # py2 support for definition order - __order__ = classdict.get('__order__') - if __order__ is None: - if pyver < 3.0: - try: - __order__ = [name for (name, value) in sorted(members.items(), key=lambda item: item[1])] - except TypeError: - __order__ = [name for name in sorted(members.keys())] - else: - __order__ = classdict._member_names - else: - del classdict['__order__'] - if pyver < 3.0: - __order__ = __order__.replace(',', ' ').split() - aliases = [name for name in members if name not in __order__] - __order__ += aliases - - # check for illegal enum names (any others?) - invalid_names = set(members) & set(['mro']) - if invalid_names: - raise ValueError('Invalid enum member name(s): %s' % ( - ', '.join(invalid_names), )) - - # create our new Enum type - enum_class = super(EnumMeta, metacls).__new__(metacls, cls, bases, classdict) - enum_class._member_names_ = [] # names in random order - if OrderedDict is not None: - enum_class._member_map_ = OrderedDict() - else: - enum_class._member_map_ = {} # name->value map - enum_class._member_type_ = member_type - - # Reverse value->name map for hashable values. - enum_class._value2member_map_ = {} - - # instantiate them, checking for duplicates as we go - # we instantiate first instead of checking for duplicates first in case - # a custom __new__ is doing something funky with the values -- such as - # auto-numbering ;) - if __new__ is None: - __new__ = enum_class.__new__ - for member_name in __order__: - value = members[member_name] - if not isinstance(value, tuple): - args = (value, ) - else: - args = value - if member_type is tuple: # special case for tuple enums - args = (args, ) # wrap it one more time - if not use_args or not args: - enum_member = __new__(enum_class) - if not hasattr(enum_member, '_value_'): - enum_member._value_ = value - else: - enum_member = __new__(enum_class, *args) - if not hasattr(enum_member, '_value_'): - enum_member._value_ = member_type(*args) - value = enum_member._value_ - enum_member._name_ = member_name - enum_member.__objclass__ = enum_class - enum_member.__init__(*args) - # If another member with the same value was already defined, the - # new member becomes an alias to the existing one. - for name, canonical_member in enum_class._member_map_.items(): - if canonical_member.value == enum_member._value_: - enum_member = canonical_member - break - else: - # Aliases don't appear in member names (only in __members__). - enum_class._member_names_.append(member_name) - enum_class._member_map_[member_name] = enum_member - try: - # This may fail if value is not hashable. We can't add the value - # to the map, and by-value lookups for this value will be - # linear. - enum_class._value2member_map_[value] = enum_member - except TypeError: - pass - - - # If a custom type is mixed into the Enum, and it does not know how - # to pickle itself, pickle.dumps will succeed but pickle.loads will - # fail. Rather than have the error show up later and possibly far - # from the source, sabotage the pickle protocol for this class so - # that pickle.dumps also fails. - # - # However, if the new class implements its own __reduce_ex__, do not - # sabotage -- it's on them to make sure it works correctly. We use - # __reduce_ex__ instead of any of the others as it is preferred by - # pickle over __reduce__, and it handles all pickle protocols. - unpicklable = False - if '__reduce_ex__' not in classdict: - if member_type is not object: - methods = ('__getnewargs_ex__', '__getnewargs__', - '__reduce_ex__', '__reduce__') - if not any(m in member_type.__dict__ for m in methods): - _make_class_unpicklable(enum_class) - unpicklable = True - - - # double check that repr and friends are not the mixin's or various - # things break (such as pickle) - for name in ('__repr__', '__str__', '__format__', '__reduce_ex__'): - class_method = getattr(enum_class, name) - obj_method = getattr(member_type, name, None) - enum_method = getattr(first_enum, name, None) - if name not in classdict and class_method is not enum_method: - if name == '__reduce_ex__' and unpicklable: - continue - setattr(enum_class, name, enum_method) - - # method resolution and int's are not playing nice - # Python's less than 2.6 use __cmp__ - - if pyver < 2.6: - - if issubclass(enum_class, int): - setattr(enum_class, '__cmp__', getattr(int, '__cmp__')) - - elif pyver < 3.0: - - if issubclass(enum_class, int): - for method in ( - '__le__', - '__lt__', - '__gt__', - '__ge__', - '__eq__', - '__ne__', - '__hash__', - ): - setattr(enum_class, method, getattr(int, method)) - - # replace any other __new__ with our own (as long as Enum is not None, - # anyway) -- again, this is to support pickle - if Enum is not None: - # if the user defined their own __new__, save it before it gets - # clobbered in case they subclass later - if save_new: - setattr(enum_class, '__member_new__', enum_class.__dict__['__new__']) - setattr(enum_class, '__new__', Enum.__dict__['__new__']) - return enum_class - - def __call__(cls, value, names=None, module=None, type=None): - """Either returns an existing member, or creates a new enum class. - - This method is used both when an enum class is given a value to match - to an enumeration member (i.e. Color(3)) and for the functional API - (i.e. Color = Enum('Color', names='red green blue')). - - When used for the functional API: `module`, if set, will be stored in - the new class' __module__ attribute; `type`, if set, will be mixed in - as the first base class. - - Note: if `module` is not set this routine will attempt to discover the - calling module by walking the frame stack; if this is unsuccessful - the resulting class will not be pickleable. - - """ - if names is None: # simple value lookup - return cls.__new__(cls, value) - # otherwise, functional API: we're creating a new Enum type - return cls._create_(value, names, module=module, type=type) - - def __contains__(cls, member): - return isinstance(member, cls) and member.name in cls._member_map_ - - def __delattr__(cls, attr): - # nicer error message when someone tries to delete an attribute - # (see issue19025). - if attr in cls._member_map_: - raise AttributeError( - "%s: cannot delete Enum member." % cls.__name__) - super(EnumMeta, cls).__delattr__(attr) - - def __dir__(self): - return (['__class__', '__doc__', '__members__', '__module__'] + - self._member_names_) - - @property - def __members__(cls): - """Returns a mapping of member name->value. - - This mapping lists all enum members, including aliases. Note that this - is a copy of the internal mapping. - - """ - return cls._member_map_.copy() - - def __getattr__(cls, name): - """Return the enum member matching `name` - - We use __getattr__ instead of descriptors or inserting into the enum - class' __dict__ in order to support `name` and `value` being both - properties for enum members (which live in the class' __dict__) and - enum members themselves. - - """ - if _is_dunder(name): - raise AttributeError(name) - try: - return cls._member_map_[name] - except KeyError: - raise AttributeError(name) - - def __getitem__(cls, name): - return cls._member_map_[name] - - def __iter__(cls): - return (cls._member_map_[name] for name in cls._member_names_) - - def __reversed__(cls): - return (cls._member_map_[name] for name in reversed(cls._member_names_)) - - def __len__(cls): - return len(cls._member_names_) - - def __repr__(cls): - return "<enum %r>" % cls.__name__ - - def __setattr__(cls, name, value): - """Block attempts to reassign Enum members. - - A simple assignment to the class namespace only changes one of the - several possible ways to get an Enum member from the Enum class, - resulting in an inconsistent Enumeration. - - """ - member_map = cls.__dict__.get('_member_map_', {}) - if name in member_map: - raise AttributeError('Cannot reassign members.') - super(EnumMeta, cls).__setattr__(name, value) - - def _create_(cls, class_name, names=None, module=None, type=None): - """Convenience method to create a new Enum class. - - `names` can be: - - * A string containing member names, separated either with spaces or - commas. Values are auto-numbered from 1. - * An iterable of member names. Values are auto-numbered from 1. - * An iterable of (member name, value) pairs. - * A mapping of member name -> value. - - """ - if pyver < 3.0: - # if class_name is unicode, attempt a conversion to ASCII - if isinstance(class_name, unicode): - try: - class_name = class_name.encode('ascii') - except UnicodeEncodeError: - raise TypeError('%r is not representable in ASCII' % class_name) - metacls = cls.__class__ - if type is None: - bases = (cls, ) - else: - bases = (type, cls) - classdict = metacls.__prepare__(class_name, bases) - __order__ = [] - - # special processing needed for names? - if isinstance(names, basestring): - names = names.replace(',', ' ').split() - if isinstance(names, (tuple, list)) and isinstance(names[0], basestring): - names = [(e, i+1) for (i, e) in enumerate(names)] - - # Here, names is either an iterable of (name, value) or a mapping. - for item in names: - if isinstance(item, basestring): - member_name, member_value = item, names[item] - else: - member_name, member_value = item - classdict[member_name] = member_value - __order__.append(member_name) - # only set __order__ in classdict if name/value was not from a mapping - if not isinstance(item, basestring): - classdict['__order__'] = ' '.join(__order__) - enum_class = metacls.__new__(metacls, class_name, bases, classdict) - - # TODO: replace the frame hack if a blessed way to know the calling - # module is ever developed - if module is None: - try: - module = _sys._getframe(2).f_globals['__name__'] - except (AttributeError, ValueError): - pass - if module is None: - _make_class_unpicklable(enum_class) - else: - enum_class.__module__ = module - - return enum_class - - @staticmethod - def _get_mixins_(bases): - """Returns the type for creating enum members, and the first inherited - enum class. - - bases: the tuple of bases that was given to __new__ - - """ - if not bases or Enum is None: - return object, Enum - - - # double check that we are not subclassing a class with existing - # enumeration members; while we're at it, see if any other data - # type has been mixed in so we can use the correct __new__ - member_type = first_enum = None - for base in bases: - if (base is not Enum and - issubclass(base, Enum) and - base._member_names_): - raise TypeError("Cannot extend enumerations") - # base is now the last base in bases - if not issubclass(base, Enum): - raise TypeError("new enumerations must be created as " - "`ClassName([mixin_type,] enum_type)`") - - # get correct mix-in type (either mix-in type of Enum subclass, or - # first base if last base is Enum) - if not issubclass(bases[0], Enum): - member_type = bases[0] # first data type - first_enum = bases[-1] # enum type - else: - for base in bases[0].__mro__: - # most common: (IntEnum, int, Enum, object) - # possible: (<Enum 'AutoIntEnum'>, <Enum 'IntEnum'>, - # <class 'int'>, <Enum 'Enum'>, - # <class 'object'>) - if issubclass(base, Enum): - if first_enum is None: - first_enum = base - else: - if member_type is None: - member_type = base - - return member_type, first_enum - - if pyver < 3.0: - @staticmethod - def _find_new_(classdict, member_type, first_enum): - """Returns the __new__ to be used for creating the enum members. - - classdict: the class dictionary given to __new__ - member_type: the data type whose __new__ will be used by default - first_enum: enumeration to check for an overriding __new__ - - """ - # now find the correct __new__, checking to see of one was defined - # by the user; also check earlier enum classes in case a __new__ was - # saved as __member_new__ - __new__ = classdict.get('__new__', None) - if __new__: - return None, True, True # __new__, save_new, use_args - - N__new__ = getattr(None, '__new__') - O__new__ = getattr(object, '__new__') - if Enum is None: - E__new__ = N__new__ - else: - E__new__ = Enum.__dict__['__new__'] - # check all possibles for __member_new__ before falling back to - # __new__ - for method in ('__member_new__', '__new__'): - for possible in (member_type, first_enum): - try: - target = possible.__dict__[method] - except (AttributeError, KeyError): - target = getattr(possible, method, None) - if target not in [ - None, - N__new__, - O__new__, - E__new__, - ]: - if method == '__member_new__': - classdict['__new__'] = target - return None, False, True - if isinstance(target, staticmethod): - target = target.__get__(member_type) - __new__ = target - break - if __new__ is not None: - break - else: - __new__ = object.__new__ - - # if a non-object.__new__ is used then whatever value/tuple was - # assigned to the enum member name will be passed to __new__ and to the - # new enum member's __init__ - if __new__ is object.__new__: - use_args = False - else: - use_args = True - - return __new__, False, use_args - else: - @staticmethod - def _find_new_(classdict, member_type, first_enum): - """Returns the __new__ to be used for creating the enum members. - - classdict: the class dictionary given to __new__ - member_type: the data type whose __new__ will be used by default - first_enum: enumeration to check for an overriding __new__ - - """ - # now find the correct __new__, checking to see of one was defined - # by the user; also check earlier enum classes in case a __new__ was - # saved as __member_new__ - __new__ = classdict.get('__new__', None) - - # should __new__ be saved as __member_new__ later? - save_new = __new__ is not None - - if __new__ is None: - # check all possibles for __member_new__ before falling back to - # __new__ - for method in ('__member_new__', '__new__'): - for possible in (member_type, first_enum): - target = getattr(possible, method, None) - if target not in ( - None, - None.__new__, - object.__new__, - Enum.__new__, - ): - __new__ = target - break - if __new__ is not None: - break - else: - __new__ = object.__new__ - - # if a non-object.__new__ is used then whatever value/tuple was - # assigned to the enum member name will be passed to __new__ and to the - # new enum member's __init__ - if __new__ is object.__new__: - use_args = False - else: - use_args = True - - return __new__, save_new, use_args - - -######################################################## -# In order to support Python 2 and 3 with a single -# codebase we have to create the Enum methods separately -# and then use the `type(name, bases, dict)` method to -# create the class. -######################################################## -temp_enum_dict = {} -temp_enum_dict['__doc__'] = "Generic enumeration.\n\n Derive from this class to define new enumerations.\n\n" - -def __new__(cls, value): - # all enum instances are actually created during class construction - # without calling this method; this method is called by the metaclass' - # __call__ (i.e. Color(3) ), and by pickle - if type(value) is cls: - # For lookups like Color(Color.red) - value = value.value - #return value - # by-value search for a matching enum member - # see if it's in the reverse mapping (for hashable values) - try: - if value in cls._value2member_map_: - return cls._value2member_map_[value] - except TypeError: - # not there, now do long search -- O(n) behavior - for member in cls._member_map_.values(): - if member.value == value: - return member - raise ValueError("%s is not a valid %s" % (value, cls.__name__)) -temp_enum_dict['__new__'] = __new__ -del __new__ - -def __repr__(self): - return "<%s.%s: %r>" % ( - self.__class__.__name__, self._name_, self._value_) -temp_enum_dict['__repr__'] = __repr__ -del __repr__ - -def __str__(self): - return "%s.%s" % (self.__class__.__name__, self._name_) -temp_enum_dict['__str__'] = __str__ -del __str__ - -def __dir__(self): - added_behavior = [ - m - for cls in self.__class__.mro() - for m in cls.__dict__ - if m[0] != '_' - ] - return (['__class__', '__doc__', '__module__', ] + added_behavior) -temp_enum_dict['__dir__'] = __dir__ -del __dir__ - -def __format__(self, format_spec): - # mixed-in Enums should use the mixed-in type's __format__, otherwise - # we can get strange results with the Enum name showing up instead of - # the value - - # pure Enum branch - if self._member_type_ is object: - cls = str - val = str(self) - # mix-in branch - else: - cls = self._member_type_ - val = self.value - return cls.__format__(val, format_spec) -temp_enum_dict['__format__'] = __format__ -del __format__ - - -#################################### -# Python's less than 2.6 use __cmp__ - -if pyver < 2.6: - - def __cmp__(self, other): - if type(other) is self.__class__: - if self is other: - return 0 - return -1 - return NotImplemented - raise TypeError("unorderable types: %s() and %s()" % (self.__class__.__name__, other.__class__.__name__)) - temp_enum_dict['__cmp__'] = __cmp__ - del __cmp__ - -else: - - def __le__(self, other): - raise TypeError("unorderable types: %s() <= %s()" % (self.__class__.__name__, other.__class__.__name__)) - temp_enum_dict['__le__'] = __le__ - del __le__ - - def __lt__(self, other): - raise TypeError("unorderable types: %s() < %s()" % (self.__class__.__name__, other.__class__.__name__)) - temp_enum_dict['__lt__'] = __lt__ - del __lt__ - - def __ge__(self, other): - raise TypeError("unorderable types: %s() >= %s()" % (self.__class__.__name__, other.__class__.__name__)) - temp_enum_dict['__ge__'] = __ge__ - del __ge__ - - def __gt__(self, other): - raise TypeError("unorderable types: %s() > %s()" % (self.__class__.__name__, other.__class__.__name__)) - temp_enum_dict['__gt__'] = __gt__ - del __gt__ - - -def __eq__(self, other): - if type(other) is self.__class__: - return self is other - return NotImplemented -temp_enum_dict['__eq__'] = __eq__ -del __eq__ - -def __ne__(self, other): - if type(other) is self.__class__: - return self is not other - return NotImplemented -temp_enum_dict['__ne__'] = __ne__ -del __ne__ - -def __hash__(self): - return hash(self._name_) -temp_enum_dict['__hash__'] = __hash__ -del __hash__ - -def __reduce_ex__(self, proto): - return self.__class__, (self._value_, ) -temp_enum_dict['__reduce_ex__'] = __reduce_ex__ -del __reduce_ex__ - -# _RouteClassAttributeToGetattr is used to provide access to the `name` -# and `value` properties of enum members while keeping some measure of -# protection from modification, while still allowing for an enumeration -# to have members named `name` and `value`. This works because enumeration -# members are not set directly on the enum class -- __getattr__ is -# used to look them up. - -@_RouteClassAttributeToGetattr -def name(self): - return self._name_ -temp_enum_dict['name'] = name -del name - -@_RouteClassAttributeToGetattr -def value(self): - return self._value_ -temp_enum_dict['value'] = value -del value - -Enum = EnumMeta('Enum', (object, ), temp_enum_dict) -del temp_enum_dict - -# Enum has now been created -########################### - -class IntEnum(int, Enum): - """Enum where members are also (and must be) ints""" - - -def unique(enumeration): - """Class decorator that ensures only unique members exist in an enumeration.""" - duplicates = [] - for name, member in enumeration.__members__.items(): - if name != member.name: - duplicates.append((name, member.name)) - if duplicates: - duplicate_names = ', '.join( - ["%s -> %s" % (alias, name) for (alias, name) in duplicates] - ) - raise ValueError('duplicate names found in %r: %s' % - (enumeration, duplicate_names) - ) - return enumeration |