def as_namespace(self, namespace=None):
key = self.key<EOL>if namespace and key.startswith(namespace):<EOL><INDENT>key = key[len(namespace) + <NUM_LIT:1>:]<EOL><DEDENT>return "<STR_LIT>" % (self.get_key(), self._default() or NotSet())<EOL>
Return this call as if it were being assigned in a pyconfig namespace.

If `namespace` is specified and matches the top level of this call's
:attr:`key`, then that section of the key will be removed.