Terry J. Reedy <[email protected]> added the comment:
Crash means 'python stopped erroneously without a traceback'.
Same exception in 3.8 and 3.9. Argparse uses None for a count of 0. I
consider this a bug. If not changed, it should be documented. As argparse is,
the example needs to recode None to 0. (Or, it could add '-v' to sys.argv.)
With proper line wrapping, the result could be
import argparse
from getpass import getuser
parser = argparse.ArgumentParser(description='An argparse example.')
parser.add_argument('name', nargs='?', default=getuser(), # wrap
help='The name of someone to greet.')
parser.add_argument('--verbose', '-v', action='count')
args = parser.parse_args() # new
args.verbose = 0 if args.verbose is None else args.verbose
greeting = (["Hi", "Hello", "Greetings! its very nice to meet you"] #wrap
[args.verbose % 3])
print(f'{greeting}, {args.name}')
----------
nosy: +terry.reedy
stage: -> needs patch
title: TypeError raised trying to run TPT 10.3 Example 2 in Python 3.4.3 ->
TypeError for Tutorial 10.3 Example 2
type: crash -> behavior
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<https://bugs.python.org/issue38678>
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