New submission from tphh <thomas.o...@pdv-fs.de>:
The newly added shlex.punctuation_chars is special compared to the other public
instance variables: It can ONLY be used when constructing a shlex instance,
unlike other public instance variables, such as commenters, which can ONLY be
set later.
>>> s = shlex.shlex('abc // def')
>>> s.commenters = '/'
>>> list(s)
['abc', '', '']
>>> s = shlex.shlex('abc // def', punctuation_chars = '/')
>>> list(s)
['abc', '//', 'def']
However, setting punctuation_chars later shows this rather useless error
message:
>>> s = shlex.shlex('abc // def')
>>> s.punctuation_chars = '/'
>>> list(s)
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/opt/python/3.7.1/lib/python3.7/shlex.py", line 295, in __next__
token = self.get_token()
File "/opt/python/3.7.1/lib/python3.7/shlex.py", line 105, in get_token
raw = self.read_token()
File "/opt/python/3.7.1/lib/python3.7/shlex.py", line 133, in read_token
if self.punctuation_chars and self._pushback_chars:
AttributeError: 'shlex' object has no attribute '_pushback_chars'
----------
components: Library (Lib)
messages: 329310
nosy: tphh
priority: normal
severity: normal
status: open
title: shlex punctuation_chars inconsistency
type: behavior
versions: Python 3.6, Python 3.7, Python 3.8
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Python tracker <rep...@bugs.python.org>
<https://bugs.python.org/issue35168>
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