test_fileinput.py 文件源码

def test_modes(self):
        with open(TESTFN, 'wb') as f:
            # UTF-7 is a convenient, seldom used encoding
            f.write('A\nB\r\nC\rD+IKw-')
        self.addCleanup(safe_unlink, TESTFN)

        def check(mode, expected_lines):
            fi = FileInput(files=TESTFN, mode=mode,
                           openhook=hook_encoded('utf-7'))
            lines = list(fi)
            fi.close()
            self.assertEqual(lines, expected_lines)

        check('r', [u'A\n', u'B\r\n', u'C\r', u'D\u20ac'])
        check('rU', [u'A\n', u'B\r\n', u'C\r', u'D\u20ac'])
        check('U', [u'A\n', u'B\r\n', u'C\r', u'D\u20ac'])
        check('rb', [u'A\n', u'B\r\n', u'C\r', u'D\u20ac'])