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Meaning of * in the function arguments list

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  Meaning of * in the function arguments list "ast" <nomail@invalid.com> - 2014-10-29 09:56 +0100
    Re: Meaning of * in the function arguments list Peter Otten <__peter__@web.de> - 2014-10-29 10:13 +0100
      Re: Meaning of * in the function arguments list "ast" <nomail@invalid.com> - 2014-10-29 10:37 +0100

#79900 — Meaning of * in the function arguments list

Hi

Consider the following to_bytes method from integer class:

int.to_bytes(length, byteorder, *, signed=False)

What doest the '*' in the arguments list means ?

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#79901

ast wrote:

> Consider the following to_bytes method from integer class:
> 
> int.to_bytes(length, byteorder, *, signed=False)
> 
> What doest the '*' in the arguments list means ?

A bare * indicates that the arguments that follow it are keyword-only:

>>> def f(a, b=2, *, c=3):
...     print("a = {}, b = {}, c = {}".format(a, b, c))
... 
>>> f(10)
a = 10, b = 2, c = 3
>>> f(10, 20)
a = 10, b = 20, c = 3
>>> f(10, 20, 30)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: f() takes from 1 to 2 positional arguments but 3 were given
>>> f(10, 20, c=30)
a = 10, b = 20, c = 30

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#79903

"Peter Otten" <__peter__@web.de> a écrit dans le message de 
news:mailman.15291.1414574006.18130.python-list@python.org...
>
> A bare * indicates that the arguments that follow it are keyword-only:
>

ok, thx 

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