twisted.python.constants._ConstantsContainer : API documentation

_ConstantsContainer is a class with attributes used as symbolic constants. It is up to subclasses to specify what kind of constants are allowed.

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	_enumerants	A `dict` mapping the names of constants (eg `NamedConstant` instances) found in the class definition to those instances.
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.

def __new__(cls): (source)

Classes representing constants containers are not intended to be instantiated.

The class object itself is used directly.

@classmethod
def _constantFactory(cls, name, descriptor): (source)

Construct the value for a new constant to add to this container.

Parameters	name	The name of the constant to create.
	descriptor	An instance of a `_Constant` subclass (eg `NamedConstant`) which is assigned to `name`.
Returns	`NamedConstant` instances have no value apart from identity, so return a meaningless dummy value.

@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.

t.p.c._ConstantsContainer(_ConstantsContainerType('', (object,), {})) : class documentation