[issue42733] io's r+ mode truncate(0)

施文峰 added the comment: hi Terry you are right i download python version 3.0.1 to check this case ''' Python 3.0.1 (r301:69556, Dec 28 2020, 14:14:02) [GCC 7.5.0] on linux5 Type "help", "copyright", "credits" or "license" for more information. &g

[issue42733] [issue] io's r+ mode truncate(0)

施文峰 added the comment: hi Steven thanks for check my post first test have a problem,you didn’t use r+ mode step is 1. f.read 2. f.truncate(0) 3. f.write(something) my test msg tell you “ tell after delete content 33 content 0 tell after write 65 “ so you know after truncate f.tell =33

[issue42733] [issue] io's r+ mode truncate(0)

New submission from 施文峰 : happen at io's reading & updating(r+) mode after read, file object's postion stay in last if you remove whole content ( truncate(0) ), postion wil not back to 0 still stay in the last then you start writing from last position(not 0) that's why problem happen test

[issue41441] io reading ＆ updating fix

Change by 施文峰 : -- pull_requests: +20837 pull_request: https://github.com/python/cpython/pull/21686 ___ Python tracker <https://bugs.python.org/issue41

[issue41441] io reading ＆ updating fix

Change by 施文峰 : -- pull_requests: -20829 ___ Python tracker <https://bugs.python.org/issue41441> ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue41441] io reading ＆ updating fix

Change by 施文峰 : -- stage: patch review -> resolved status: open -> closed ___ Python tracker <https://bugs.python.org/issue41441> ___ ___ Python-bugs-list

[issue41441] io reading ＆ updating fix

施文峰 added the comment: Please refer to the test case- https://github.com/841020/open_source -- ___ Python tracker <https://bugs.python.org/issue41441> ___ ___

[issue41441] io reading ＆ updating fix

Change by 施文峰 : -- resolution: -> fixed ___ Python tracker <https://bugs.python.org/issue41441> ___ ___ Python-bugs-list mailing list Unsubscrib

[issue41441] io reading ＆ updating fix

New submission from 施文峰 : happen at io's reading & updating(r+) mode if you remove whole content ( truncate(0) ), tell wil not back to 0 then you start writing will start at current position that's why problem happen -- ___ Python tracker &l

[issue41441] io reading ＆ updating fix

Change by 施文峰 : -- keywords: +patch pull_requests: +20829 stage: -> patch review pull_request: https://github.com/python/cpython/pull/21686 ___ Python tracker <https://bugs.python.org/issu

[issue41441] io reading ＆ updating fix

Change by 施文峰 : -- components: IO nosy: ke265379ke priority: normal severity: normal status: open title: io reading ＆ updating fix type: enhancement versions: Python 3.8 ___ Python tracker <https://bugs.python.org/issue41