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| author | Victor Stinner <vstinner@python.org> | 2020-03-04 17:50:22 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2020-03-04 17:50:22 (GMT) |
| commit | 942f7a2dea2e95a0fa848329565c0d0288d92e47 (patch) | |
| tree | 31abda8d45ef676a46ea63a6a8a61ccf6061e9c5 /Lib/fileinput.py | |
| parent | 00c77ae55a82548a6b45af73cdf712ea34910645 (diff) | |
| download | cpython-942f7a2dea2e95a0fa848329565c0d0288d92e47.zip cpython-942f7a2dea2e95a0fa848329565c0d0288d92e47.tar.gz cpython-942f7a2dea2e95a0fa848329565c0d0288d92e47.tar.bz2 | |
bpo-39674: Revert "bpo-37330: open() no longer accept 'U' in file mode (GH-16959)" (GH-18767)
This reverts commit e471e72977c83664f13d041c78549140c86c92de.
The mode will be removed from Python 3.10.
Diffstat (limited to 'Lib/fileinput.py')
| -rw-r--r-- | Lib/fileinput.py | 11 |
1 files changed, 8 insertions, 3 deletions
diff --git a/Lib/fileinput.py b/Lib/fileinput.py index 166c631..c1b0ec9 100644 --- a/Lib/fileinput.py +++ b/Lib/fileinput.py @@ -209,10 +209,15 @@ class FileInput: self._isstdin = False self._backupfilename = None # restrict mode argument to reading modes - if mode not in ('r', 'rb'): - raise ValueError("FileInput opening mode must be 'r' or 'rb'") + if mode not in ('r', 'rU', 'U', 'rb'): + raise ValueError("FileInput opening mode must be one of " + "'r', 'rU', 'U' and 'rb'") + if 'U' in mode: + import warnings + warnings.warn("'U' mode is deprecated", + DeprecationWarning, 2) self._mode = mode - self._write_mode = mode.replace('r', 'w') + self._write_mode = mode.replace('r', 'w') if 'U' not in mode else 'w' if openhook: if inplace: raise ValueError("FileInput cannot use an opening hook in inplace mode") |