[issue21977] In the re's token example OP and SKIP regexes can be improved
New submission from py.user:
https://docs.python.org/3/library/re.html#writing-a-tokenizer
There are redundant escapes in the regex:
('OP', r'[+*\/\-]'),# Arithmetic operators
Sequence -+*/ is sufficient.
It makes the loop to do all steps on every 4 spaces:
('SKIP',r'[ \t]'), # Skip over spaces and tabs
Sequence [ \t]+ is faster.
Applied patch.
--
assignee: docs@python
components: Documentation, Regular Expressions
files: re_ex_tok.diff
keywords: patch
messages: 223000
nosy: docs@python, ezio.melotti, mrabarnett, py.user
priority: normal
severity: normal
status: open
title: In the re's token example OP and SKIP regexes can be improved
type: enhancement
versions: Python 3.5
Added file: http://bugs.python.org/file35951/re_ex_tok.diff
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[issue21977] In the re's token example OP and SKIP regexes can be improved
Changes by Raymond Hettinger raymond.hettin...@gmail.com: -- assignee: docs@python - rhettinger nosy: +rhettinger ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21977 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21977] In the re's token example OP and SKIP regexes can be improved
Raymond Hettinger added the comment: I will keep the \- because the - at the front of the character range is a non-obvious special case. The other changes look reasonable. -- priority: normal - low stage: - commit review type: enhancement - performance versions: +Python 2.7, Python 3.4 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21977 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21977] In the re's token example OP and SKIP regexes can be improved
Roundup Robot added the comment: New changeset bb28542af060 by Raymond Hettinger in branch '3.4': Issue 21977: Minor improvements to the regexes in the tokenizer example. http://hg.python.org/cpython/rev/bb28542af060 -- nosy: +python-dev ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21977 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21977] In the re's token example OP and SKIP regexes can be improved
Changes by Raymond Hettinger raymond.hettin...@gmail.com: -- resolution: - fixed status: open - closed versions: -Python 2.7 ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21977 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
[issue21977] In the re's token example OP and SKIP regexes can be improved
Changes by Berker Peksag berker.pek...@gmail.com: -- stage: commit review - resolved ___ Python tracker rep...@bugs.python.org http://bugs.python.org/issue21977 ___ ___ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
