[Python-checkins] [python/cpython] e14af3: Simplify code in warnings modules (#1957)

[GitHub]

  Branch: refs/heads/2.7
  Home:   https://github.com/python/cpython
  Commit: e14af32cc656249c2d785d190cc981869aa257f6
      https://github.com/python/cpython/commit/e14af32cc656249c2d785d190cc981869aa257f6
  Author: Alex Gaynor <alex.gaynor at gmail.com>
  Date:   2017-06-05 (Mon, 05 Jun 2017)

  Changed paths:
    M Lib/warnings.py

  Log Message:
  -----------
  Simplify code in warnings modules (#1957)

Metaprogramming a list of attributes was excessive, and made the code less readable and slower.

Backport of 5de3a64179bafcd440b32849b1129ed1fea47b85