AssertionError: (-1, 163, 5, 0, 0)

I just installed bpython using pipx and...

bpython version 0.21 on top of Python 3.7.9 /Users/bryanhu/.local/pipx/venvs/bpython/bin/python

Traceback (most recent call last):
  File "/Users/bryanhu/.local/bin/bpython", line 8, in <module>
    sys.exit(main())
  File "/Users/bryanhu/.local/pipx/venvs/bpython/lib/python3.7/site-packages/bpython/curtsies.py", line 201, in main
    exit_value = repl.mainloop(True, paste)
  File "/Users/bryanhu/.local/pipx/venvs/bpython/lib/python3.7/site-packages/bpython/curtsies.py", line 113, in mainloop
    self.process_event_and_paint(None)
  File "/Users/bryanhu/.local/pipx/venvs/bpython/lib/python3.7/site-packages/bpython/curtsies.py", line 95, in process_event_and_paint
    array, cursor_pos = self.paint()
  File "/Users/bryanhu/.local/pipx/venvs/bpython/lib/python3.7/site-packages/bpython/curtsiesfrontend/repl.py", line 1615, in paint
    self.cursor_offset,
AssertionError: (-1, 163, 5, 0, 0)

Repro percentage: 100% (even after restarting my terminal)
(Possible) Repro steps:

Install bpython using pipx
Run bpython-curses several times
Run bpython

Possibly useful:

Are you using cwcwidth version 0.1.3 or newer?

Are you using cwcwidth version 0.1.3 or newer?

How do I test that?

EDIT: Also, the issue is still reproducing

pip freeze should tell you. Otherwise: python -c "import cwcwidth; print(cwcwidth.__version__)"

Okay, this looks like a case where cwcwidth fails to determine the length of a string with your locale. So: what's your locale? On the main branch you can also run bpython -l info -L log and check the file log for the version and environment variable output.

$ locale
LANG="en_US.UTF-8"
LC_COLLATE="en_US.UTF-8"
LC_CTYPE="en_US.UTF-8"
LC_MESSAGES="en_US.UTF-8"
LC_MONETARY="en_US.UTF-8"
LC_NUMERIC="en_US.UTF-8"
LC_TIME="en_US.UTF-8"
LC_ALL=

Thanks. \r shouldn't be contained in that string. I'll need to find out if some code path acts differently under iTerm2 that causes \r to be present. I suppose you are using the default config, right?

I suppose you are using the default config, right?

No, I did quite some customizations (assuming you're referring to iTerm2)

I meant your bpython config. Did you change its or Python's ps1 or ps2?

Okay, I think I got it. Your sys.ps1 i set to \r>>> . I guess we need to strip \r in that case.

Yes, my sys.ps1 is configured. To be precise, it has ansi escapes in them. I added the /r just in case (pasting was getting wonky but now I figured it's Python's fault. I can change it back if I need to make this work)

At least the \r is a problem. In any case, I'll fix it to not fail but ignore it in case bpython cannot handle it.

Replace ps1/ps2 with the default if values are not usable (fixes bpyt…

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AssertionError: (-1, 163, 5, 0, 0) #896

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