tests/readlink.py

import-checker: establish new function for verifying import conventions

A future patch will formalize the modern import convention. In
preparation for that, introduce a new wrapper function that will invoke
the proper function.

#!/usr/bin/env python

import errno, os, sys

for f in sys.argv[1:]:
    try:
        print f, '->', os.readlink(f)
    except OSError as err:
        if err.errno != errno.EINVAL:
            raise
        print f, 'not a symlink'

sys.exit(0)