mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-07-24 03:35:53 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 8

allow keyword args after *args in a function call

Browse source
This commit is contained in:
Benjamin Peterson 2008-08-19 20:57:10 +00:00
parent de0de885f7
commit 2d735bc098
6 changed files with 30 additions and 13 deletions
Download patch file Download diff file Expand all files Collapse all files

19
Doc/reference/expressions.rst
View file

@ -612,11 +612,11 @@ of arguments:
call: `primary` "(" [`argument_list` [","]
: | `expression` `genexpr_for`] ")"
argument_list: `positional_arguments` ["," `keyword_arguments`]
: ["," "*" `expression`]
: ["," "**" `expression`]
: ["," "*" `expression`] ["," `keyword_arguments`]
: ["," "**" `expression`]
: | `keyword_arguments` ["," "*" `expression`]
: ["," "**" `expression`]
: | "*" `expression` ["," "**" `expression`]
: ["," `keyword_arguments`] ["," "**" `expression`]
: | "*" `expression` ["," `keyword_arguments`] ["," "**" `expression`]
: | "**" `expression`
positional_arguments: `expression` ("," `expression`)*
keyword_arguments: `keyword_item` ("," `keyword_item`)*
@ -674,12 +674,13 @@ there were no excess keyword arguments.
If the syntax ``*expression`` appears in the function call, ``expression`` must
evaluate to a sequence. Elements from this sequence are treated as if they were
additional positional arguments; if there are positional arguments *x1*,...,*xN*
, and ``expression`` evaluates to a sequence *y1*,...,*yM*, this is equivalent
to a call with M+N positional arguments *x1*,...,*xN*,*y1*,...,*yM*.
additional positional arguments; if there are positional arguments *x1*,...,
*xN*, and ``expression`` evaluates to a sequence *y1*, ..., *yM*, this is
equivalent to a call with M+N positional arguments *x1*, ..., *xN*, *y1*, ...,
*yM*.
A consequence of this is that although the ``*expression`` syntax appears
*after* any keyword arguments, it is processed *before* the keyword arguments
A consequence of this is that although the ``*expression`` syntax may appear
*after* some keyword arguments, it is processed *before* the keyword arguments
(and the ``**expression`` argument, if any -- see below). So::
>>> def f(a, b):