[issue19206] Support disabling file I/O when doing traceback formatting

Change by Irit Katriel : -- stage: -> resolved status: pending -> closed ___ Python tracker ___ ___ Python-bugs-list mailing list U

[issue19206] Support disabling file I/O when doing traceback formatting

Irit Katriel added the comment: Since this issue was created, the traceback module changed considerably, and now we have the TracebackException/StackSummary classes which capture information about an exception for later rendering. The lookup_lines arg controls the timing of the file access:

[issue19206] Support disabling file I/O when doing traceback formatting

Change by Irit Katriel : -- versions: +Python 3.10, Python 3.9 ___ Python tracker ___ ___ Python-bugs-list mailing list Unsubscribe:

[issue19206] Support disabling file I/O when doing traceback formatting

STINNER Victor added the comment: > Unfortunately, the traceback.py module reads from files to load the source > lines for the traceback (using linecache.py). linecache is supposed to cache the result. When all files generating tracebacks of your project are cached, only os.stat() is called on

[issue19206] Support disabling file I/O when doing traceback formatting

New submission from Itamar Turner-Trauring: In certain situations it is best to avoid doing file I/O. For example, a program that runs in an event loop may wish to avoid any potentially blocking operations; reading from a file usually is fast, but can sometimes take arbitrary long. Another exa