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author | Serhiy Storchaka <storchaka@gmail.com> | 2015-11-01 16:43:58 +0200 |
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committer | Serhiy Storchaka <storchaka@gmail.com> | 2015-11-01 16:43:58 +0200 |
commit | f89b2c2ac4782f1054b756b556808da16792efa6 (patch) | |
tree | 801ae514f8ffa661a97c9c118ac1f8c5e62b2af2 | |
parent | 68f08a92ac3b8eb23e8fea1291cd86b12fffd1af (diff) | |
download | cpython-f89b2c2ac4782f1054b756b556808da16792efa6.tar.gz |
Issue #25510: fileinput.FileInput.readline() now returns b'' instead of ''
at the end if the FileInput was opened with binary mode.
Patch by Ryosuke Ito.
-rw-r--r-- | Lib/fileinput.py | 5 | ||||
-rw-r--r-- | Lib/test/test_fileinput.py | 15 | ||||
-rw-r--r-- | Misc/NEWS | 4 |
3 files changed, 23 insertions, 1 deletions
diff --git a/Lib/fileinput.py b/Lib/fileinput.py index 8af4a57f02..81a7545dd8 100644 --- a/Lib/fileinput.py +++ b/Lib/fileinput.py @@ -315,7 +315,10 @@ class FileInput: return line if not self._file: if not self._files: - return "" + if 'b' in self._mode: + return b'' + else: + return '' self._filename = self._files[0] self._files = self._files[1:] self._filelineno = 0 diff --git a/Lib/test/test_fileinput.py b/Lib/test/test_fileinput.py index 1d089f52b8..4765a056f6 100644 --- a/Lib/test/test_fileinput.py +++ b/Lib/test/test_fileinput.py @@ -288,6 +288,21 @@ class FileInputTests(unittest.TestCase): with self.assertRaises(UnicodeDecodeError): # Read to the end of file. list(fi) + self.assertEqual(fi.readline(), '') + self.assertEqual(fi.readline(), '') + + def test_readline_binary_mode(self): + with open(TESTFN, 'wb') as f: + f.write(b'A\nB\r\nC\rD') + self.addCleanup(safe_unlink, TESTFN) + + with FileInput(files=TESTFN, mode='rb') as fi: + self.assertEqual(fi.readline(), b'A\n') + self.assertEqual(fi.readline(), b'B\r\n') + self.assertEqual(fi.readline(), b'C\rD') + # Read to the end of file. + self.assertEqual(fi.readline(), b'') + self.assertEqual(fi.readline(), b'') def test_context_manager(self): try: @@ -96,6 +96,10 @@ Core and Builtins Library ------- +- Issue #25510: fileinput.FileInput.readline() now returns b'' instead of '' + at the end if the FileInput was opened with binary mode. + Patch by Ryosuke Ito. + - Issue #21827: Fixed textwrap.dedent() for the case when largest common whitespace is a substring of smallest leading whitespace. Based on patch by Robert Li. |