가변 파라미터

 

def varfun1(*args, **kwargs):
  print("cnt_args = " + str(len(args)))
  print("cnt_kwargs = " + str(len(kwargs)))

>>> def varfun1(*args, **kwargs):
...   print("cnt_args = " + str(len(args)))
...   print("cnt_kwargs = " + str(len(kwargs)))
...
>>>
>>> varfun1(11)
cnt_args = 1
cnt_kwargs = 0

>>> varfun1(11, b=22)
cnt_args = 1
cnt_kwargs = 1

>>> varfun1(11, b=22, [11,22,33])
  File "<stdin>", line 1
    varfun1(11, b=22, [11,22,33])
                                ^
SyntaxError: positional argument follows keyword argument

>>> varfun1(11, b=22, c=[11,22,33])
cnt_args = 1
cnt_kwargs = 2
>>>