New submission from David Goldsmith <eulergaussriem...@gmail.com>:
When I run the second example code of Section 10.3 of The Python Tutorial:
import argparse
from getpass import getuser
parser = argparse.ArgumentParser(description='An argparse example.')
parser.add_argument('name', nargs='?', default=getuser(), help='The name of
someone to greet.')
parser.add_argument('--verbose', '-v', action='count')
args = parser.parse_args()
greeting = ["Hi", "Hello", "Greetings! its very nice to meet you"][args.verbose
% 3]
print(f'{greeting}, {args.name}')
if not args.verbose:
print('Try running this again with multiple "-v" flags!')
the greeting assignment line raises:
>>> greeting = ["Hi", "Hello", "Greetings! its very nice to meet
>>> you"][args.verbose % 3]
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unsupported operand type(s) for %: 'NoneType' and 'int'
Is this an artifact of me being so far behind in my Python version:
Davids-MacBook-Air:~ DLG$ python3
Python 3.4.3 |Anaconda 2.4.0 (x86_64)| (default, Oct 20 2015, 14:27:51)
[GCC 4.2.1 (Apple Inc. build 5577)] on darwin
Or is it a bug in the example code in the doc?
----------
assignee: docs@python
components: Documentation
messages: 355914
nosy: David Goldsmith, docs@python
priority: normal
severity: normal
status: open
title: TypeError raised trying to run TPT 10.3 Example 2 in Python 3.4.3
type: crash
_______________________________________
Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue38678>
_______________________________________
_______________________________________________
Python-bugs-list mailing list
Unsubscribe:
https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
