Function getfullargspec

Lib/inspect.py:1258–1348

Get the names and default values of a callable object's parameters. A tuple of seven things is returned: (args, varargs, varkw, defaults, kwonlyargs, kwonlydefaults, annotations). 'args' is a list of the parameter names. 'varargs' and 'varkw' are the names of the * and ** parameters

(func)

    'args, varargs, varkw, defaults, kwonlyargs, kwonlydefaults, annotations')

def getfullargspec(func):
    """Get the names and default values of a callable object's parameters.

    A tuple of seven things is returned:
    (args, varargs, varkw, defaults, kwonlyargs, kwonlydefaults, annotations).
    'args' is a list of the parameter names.
    'varargs' and 'varkw' are the names of the * and ** parameters or None.
    'defaults' is an n-tuple of the default values of the last n parameters.
    'kwonlyargs' is a list of keyword-only parameter names.
    'kwonlydefaults' is a dictionary mapping names from kwonlyargs to defaults.
    'annotations' is a dictionary mapping parameter names to annotations.

    Notable differences from inspect.signature():
      - the "self" parameter is always reported, even for bound methods
      - wrapper chains defined by __wrapped__ *not* unwrapped automatically
    """
    try:
        # Re: `skip_bound_arg=False`
        #
        # There is a notable difference in behaviour between getfullargspec
        # and Signature: the former always returns 'self' parameter for bound
        # methods, whereas the Signature always shows the actual calling
        # signature of the passed object.
        #
        # To simulate this behaviour, we "unbind" bound methods, to trick
        # inspect.signature to always return their first parameter ("self",
        # usually)

        # Re: `follow_wrapper_chains=False`
        #
        # getfullargspec() historically ignored __wrapped__ attributes,
        # so we ensure that remains the case in 3.3+

        sig = _signature_from_callable(func,
                                       follow_wrapper_chains=False,
                                       skip_bound_arg=False,
                                       sigcls=Signature,
                                       eval_str=False)
    except Exception as ex:
        # Most of the times 'signature' will raise ValueError.
        # But, it can also raise AttributeError, and, maybe something
        # else. So to be fully backwards compatible, we catch all
        # possible exceptions here, and reraise a TypeError.
        raise TypeError('unsupported callable') from ex

    args = []
    varargs = None
    varkw = None
    posonlyargs = []
    kwonlyargs = []
    annotations = {}
    defaults = ()
    kwdefaults = {}

    if sig.return_annotation is not sig.empty:
        annotations['return'] = sig.return_annotation

    for param in sig.parameters.values():