smtplib.py

def _print_debug(self, *args):
    if self.debuglevel > 1:
        print(datetime.datetime.now().time(), *args, file=sys.stderr)
    else:
        print(*args, file=sys.stderr)

def print(self, *args, sep=‘ ‘, end=‘\n‘, file=None): # known special case of print
    """
    print(value, ..., sep=‘ ‘, end=‘\n‘, file=sys.stdout, flush=False)
    
    Prints the values to a stream, or to sys.stdout by default.
    Optional keyword arguments:
    file:  a file-like object (stream); defaults to the current sys.stdout.
    sep:   string inserted between values, default a space.
    end:   string appended after the last value, default a newline.
    flush: whether to forcibly flush the stream.
    """
    pass

smtplib.py

原文：https://www.cnblogs.com/rsapaper/p/13502590.html