twisted.python.constants.Values : API documentation

Class Method lookupByValue Retrieve a constant by its value or raise a ValueError if there is no constant associated with that value.

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.

@classmethod
def lookupByValue(cls, value): (source)

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

Parameters	value	The value of one of the constants defined by `cls`.
Returns	The `ValueConstant` associated with `value`.
Raises	ValueError	If `value` is not the value of one of the constants defined by `cls`.

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