diff options
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 166c631689..c1b0ec9a8e 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") |