mirrors/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython.git synced 2025-08-31 14:07:50 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 9

- Issue #2091: error correctly on open() with mode 'U' and '+'

Browse source 
open() accepted a 'U' mode string containing '+', but 'U' can only be used with
'r'. Patch from Jeff Balogh and John O'Connor.
This commit is contained in:
Robert Collins 2015-07-26 06:43:13 +12:00
parent 882667203c
commit c94a1dc4c9
4 changed files with 14 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

4
Lib/_pyio.py
View file

@ -181,8 +181,8 @@ def open(file, mode="r", buffering=-1, encoding=None, errors=None,
text = "t" in modes
binary = "b" in modes
if "U" in modes:
if creating or writing or appending:
raise ValueError("can't use U and writing mode at once")
if creating or writing or appending or updating:
raise ValueError("mode U cannot be combined with 'x', 'w', 'a', or '+'")
import warnings
warnings.warn("'U' mode is deprecated",
DeprecationWarning, 2)