[issue12972] Color prompt + readline
Damian added the comment: Just a quick comment that I ran into this again, but turns out that it's not an issue with python. Rather, this is a quirk with how readline works... https://stackoverflow.com/questions/9468435/look-how-to-fix-column-calculation-in-python-readline-if-use-color-prompt Color prompts need to be wrapped by RL_PROMPT_START_IGNORE and RL_PROMPT_END_IGNORE. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12972 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12972] Color prompt + readline
Terry J. Reedy added the comment: Thanks for the followup. This should be useful info for anyone who finds this issue. -- ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12972 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12972] Color prompt + readline
Terry J. Reedy tjre...@udel.edu added the comment: Since 2.7 was released after 3.1, I will assumed any bugfix was applied there also until someone determines otherwise. Thanks for checking. -- resolution: - out of date status: open - closed ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12972 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12972] Color prompt + readline
Damian atag...@gmail.com added the comment: Retested with Python 3.1.1 and this issue doesn't manifest. This can be resolved - sorry about the noise. :) -- nosy: +atagar ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12972 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12972] Color prompt + readline
Terry J. Reedy tjre...@udel.edu added the comment: From your version choice, you apparently are using 2.6, which is in security-fix only mode. Please test with the latest 2.7 and/or 3.2. -- nosy: +terry.reedy stage: - test needed versions: +Python 2.7 -Python 2.6 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue12972 ___ ___ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue12972] Color prompt + readline
New submission from Damian atag...@gmail.com:
Hi, when using terminal coloring codes (for instance '\x1b[32mhello
world\x1b[0m' for a green 'hello world') the raw_input function and readline
module behave well except under a very specific use case...
import readline # provides history via up/down
prompt = '\x1b[32m \x1b[0m' # green ' ' prompt
while True:
raw_input(prompt)
This provides a green prompt and up/down cycles through prior input. This works
well as long as the input is shorter than the prompt string length (in this
case 13 characters). However, if the input is longer than the prompt then
up/down thinks that the first thirteen rendered characters now belong to the
prompt. For instance...
atagar@fenrir:~/Desktop/arm$ python tmp.py
http://docs.python.org/library/readline
Press up, then down to get back to a blank prompt. You'll have...
http://do
This is probably due to a len() check on the raw_input argument...
len(' http://do')
13
len('\x1b[32m \x1b[0m')
13
I'm at a bit of a loss for investigating this further - help would be
appreciated! -Damian
--
messages: 143977
nosy: atagar1
priority: normal
severity: normal
status: open
title: Color prompt + readline
type: behavior
versions: Python 2.6
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