def __call__(self, string):
        try:
            return super(AuthCredentialsArgType, self).__call__(string)
        except ArgumentTypeError:
            # No password provided, will prompt for it later.
            return self.key_value_class(
                key=string,
                value=None,
                sep=SEP_CREDENTIALS,
                orig=string
            )
Parse credentials from `string`.
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/httpie/input.py/AuthCredentialsArgType.__call__