[New-bugs-announce] [issue31071] Bad error message about maps not iterable

Stefan Pochmann report at bugs.python.org
Fri Jul 28 12:03:22 EDT 2017


New submission from Stefan Pochmann:

Python 3.6 makes it sound like maps aren't iterable:

>>> map(str, *map(int, [[]]))
Traceback (most recent call last):
  File "<pyshell#0>", line 1, in <module>
    map(str, *map(int, [[]]))
TypeError: type object argument after * must be an iterable, not map

More, including a likely explanation, in my question and its answer here:
https://stackoverflow.com/q/45363330/1672429

Apparently the TypeError from int([]) gets mistaken for a TypeError indicating non-iterability of the map object.

----------
messages: 299402
nosy: Stefan Pochmann
priority: normal
severity: normal
status: open
title: Bad error message about maps not iterable
type: behavior
versions: Python 3.6

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue31071>
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