twisted.python.constants._ConstantsContainer : API documentation

Method	__new__	Classes representing constants containers are not intended to be instantiated.
Class Method	lookupByName	Retrieve a constant by its name or raise a `ValueError` if there is no constant associated with that name.
Class Method	iterconstants	Iteration over a `Names` subclass results in all of the constants it contains.
Class Variable	_constantType	Specified by a `_ConstantsContainer` subclass to specify the type of constants allowed by that subclass.
Class Variable	_enumerantsInitialized	A `bool` tracking whether `_enumerants` has been initialized yet or not.
Class Variable	_enumerants	A `dict` mapping the names of constants (eg `NamedConstant` instances) found in the class definition to those instances. This is initialized via the `_EnumerantsInitializer` descriptor the first time it is accessed.
Class Method	_initializeEnumerants	Find all of the `NamedConstant` instances in the definition of `cls`, initialize them with constant values, and build a mapping from their names to them to attach to `cls`.
Class Method	_constantFactory	Construct the value for a new constant to add to this container.

_enumerants =

A dict mapping the names of constants (eg NamedConstant instances) found in the class definition to those instances. This is initialized via the _EnumerantsInitializer descriptor the first time it is accessed.

@classmethod
def _initializeEnumerants(cls): (source)

Find all of the NamedConstant instances in the definition of cls, initialize them with constant values, and build a mapping from their names to them to attach to cls.

@classmethod
def lookupByName(cls, name): (source)

Retrieve a constant by its name or raise a ValueError if there is no constant associated with that name.

Parameters	name	A `str` giving the name of one of the constants defined by `cls`.
Returns	The `NamedConstant` associated with `name`.
Raises	ValueError	If `name` is not the name of one of the constants defined by `cls`.

@classmethod
def iterconstants(cls): (source)

Iteration over a Names subclass results in all of the constants it contains.

Returns an iterator the elements of which are the NamedConstant instances defined in the body of this Names subclass.

Parameters	name	The name of the constant to create.
Returns	`NamedConstant` instances have no value apart from identity, so return a meaningless dummy value.

t.p.c._ConstantsContainer(object) : class documentation