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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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue21977>
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