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[Kovid Goyal <844592@xxxxxxxxxxxxxxxxxx>]

And for completeness, here's a wrapper script that uses the env var
PYFLAKES_BUILTINS

#!/usr/bin/env python
import os, __builtin__

names = os.environ.get('PYFLAKES_BUILTINS', '')
names = [x.strip() for x in names.split(',')]
for x in names:
    if not hasattr(__builtin__, x):
        setattr(__builtin__, x, True)

del names, os, __builtin__

from pyflakes.scripts.pyflakes import main
main()

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dev, which is the registrant for Pyflakes.
https://bugs.launchpad.net/bugs/844592

Title:
  Recognize _("text") from gettext.install(...)

Status in Pyflakes:
  Won't Fix

Bug description:
  gettext module provides convenience function gettext.install() that
  injects a callable _ [single underscore] into builtins, so that
  internationalized code can be written like this:

  print _("text")

  pyflakes reports every _ as undefined symbol.

  moreover since it is injected in builtins, all imported modules have
  that symbol, thus the following works:

  # main.py
  import gettext
  import somemod
  gettext.install(...)

  #somemod.py
  print _("text")

  I'm not sure what sort of heuristic could be used to recognize _() when pyflake checks somemod.py.
  Perhaps a command line argument for extra builtins?

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