[Python-checkins] [python/cpython] 4c78c5: bpo-29622: Make AST constructor to accept less tha...

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/python/cpython
  Commit: 4c78c527d215c37472145152cb0e95f196cdddc9
      https://github.com/python/cpython/commit/4c78c527d215c37472145152cb0e95f196cdddc9
  Author: INADA Naoki <methane at users.noreply.github.com>
  Date:   2017-02-24 (Fri, 24 Feb 2017)

  Changed paths:
    M Lib/test/test_ast.py
    M Parser/asdl_c.py
    M Python/Python-ast.c

  Log Message:
  -----------
  bpo-29622: Make AST constructor to accept less than enough number of positional arguments (GH-249)

bpo-29463 added optional "docstring" field to 4 AST types.
While it is optional, it breaks backward compatibility because AST constructor
requires number of positional argument is same to number of fields.

AST types accepts empty arguments, and incomplete keyword arguments.
But it's not big problem because field can be filled after creation, and checked when compiling.
So stop requiring complete set of fields for positional arguments too.