Function check_valid_file

Lib/test/support/__init__.py:853–860

(fn)

    fn = os.path.join(TEST_DATA_DIR, filename)

    def check_valid_file(fn):
        f = open(fn, *args, **kw)
        if check is None:
            return f
        elif check(f):
            f.seek(0)
            return f
        f.close()

    if os.path.exists(fn):
        f = check_valid_file(fn)