Variable ListBox crashes for long variables repr

[alexfikl]

Variable ListBox crashes for long variables repr

[mvanderkamp]

Ooh actually to be even more precise it's something to do with the newline characters. If I had to guess I'd say that urwid has a bug with how it handles special characters.

What I did:

import random
floats = [random.random() for _ in range(512)]
columns = [floats[i::5] for i in range(5)]
rows = list(zip(*columns))
strings = '\n'.join(', '.join(str(x) for x in row) for row in rows)

This skips the numpy dependency and, by comparing how the different variables behave, you can see that it's really only when you enable line wrapping and use the str stringifier on the strings variable that urwid hits a traceback.

I'm not sure why str is the one to trigger it instead of repr. Probably something to do with how I included the newlines.

[mvanderkamp]

I managed to reproduce, but with the following additions:

• repr is the default stringifier
• line wrapping is enabled for the variable display

[mvanderkamp]

Anyway this looks more like an urwid than pudb bug, and I suspect it's got something to do with the way numpy formats its strings, since I can't reproduce just with a long regular python list of floating point numbers.

[mvanderkamp]

If it helps, just a single one of those numpy arrays is sufficient to trigger the traceback for me.