New submission from Edward K Ream <[email protected]>:
Tested on 3.6.
tokenize.untokenize does not round-trip whitespace before backslash-newlines
outside of strings:
from io import BytesIO
import tokenize
# Round tripping fails on the second string.
table = (
r'''
print\
("abc")
''',
r'''
print \
("abc")
''',
)
for s in table:
tokens = list(tokenize.tokenize(
BytesIO(s.encode('utf-8')).readline))
result = g.toUnicode(tokenize.untokenize(tokens))
print(result==s)
I have an important use case that would benefit from a proper untokenize. After
considerable study, I have not found a proper fix for tokenize.add_whitespace.
I would be happy to work with anyone to rewrite tokenize.untokenize so that
unit tests pass without fudges in TestRoundtrip.check_roundtrip.
----------
messages: 355827
nosy: edreamleo
priority: normal
severity: normal
status: open
title: Untokenize does not round-trip ws before bs-nl
type: behavior
versions: Python 3.6
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Python tracker <[email protected]>
<https://bugs.python.org/issue38663>
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