oinspect.py 文件源码

def call_tip(oinfo, format_call=True):
    """Extract call tip data from an oinfo dict.

    Parameters
    ----------
    oinfo : dict

    format_call : bool, optional
      If True, the call line is formatted and returned as a string.  If not, a
      tuple of (name, argspec) is returned.

    Returns
    -------
    call_info : None, str or (str, dict) tuple.
      When format_call is True, the whole call information is formattted as a
      single string.  Otherwise, the object's name and its argspec dict are
      returned.  If no call information is available, None is returned.

    docstring : str or None
      The most relevant docstring for calling purposes is returned, if
      available.  The priority is: call docstring for callable instances, then
      constructor docstring for classes, then main object's docstring otherwise
      (regular functions).
    """
    # Get call definition
    argspec = oinfo.get('argspec')
    if argspec is None:
        call_line = None
    else:
        # Callable objects will have 'self' as their first argument, prune
        # it out if it's there for clarity (since users do *not* pass an
        # extra first argument explicitly).
        try:
            has_self = argspec['args'][0] == 'self'
        except (KeyError, IndexError):
            pass
        else:
            if has_self:
                argspec['args'] = argspec['args'][1:]

        call_line = oinfo['name']+format_argspec(argspec)

    # Now get docstring.
    # The priority is: call docstring, constructor docstring, main one.
    doc = oinfo.get('call_docstring')
    if doc is None:
        doc = oinfo.get('init_docstring')
    if doc is None:
        doc = oinfo.get('docstring','')

    return call_line, doc