[issue7176] sum() doesn't work for lists.
Mark Dickinson
report at bugs.python.org
Tue Oct 20 15:53:23 CEST 2009
Mark Dickinson <dickinsm at gmail.com> added the comment:
To sum lists, you need to supply a second argument to sum:
>>> sum([[1, 2], ['x', 'y']], [])
[1, 2, 'x', 'y']
The default value of the second argument is 0, which is why you're seeing
the TypeError.
----------
nosy: +mark.dickinson
resolution: -> invalid
status: open -> closed
_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue7176>
_______________________________________
More information about the Python-bugs-list
mailing list