[New-bugs-announce] [issue18662] re.escape should not escape the hyphen

James Laver report at bugs.python.org
Mon Aug 5 19:10:44 CEST 2013


New submission from James Laver:

Traceback (most recent call last):
  File "/Users/jlaver/retest.py", line 6, in test_escape
    self.assertEquals(re.escape('-'), '-')
AssertionError: '\\-' != '-'

The only place you can do bad things with hyphens is in a character class. I fail to see how you'd be in the situation of wanting to use escape()d data in a character class. Even if I could think of a reason to do that, it's decidedly not the usual case.

It's http://bugs.python.org/issue2650 all over again, just with a different character (in that case, underscore).

While we're at it, what else shouldn't it be escaping?

----------
components: Regular Expressions
files: rebugtest.py
messages: 194495
nosy: ezio.melotti, jjl, mrabarnett
priority: normal
severity: normal
status: open
title: re.escape should not escape the hyphen
type: behavior
versions: Python 2.6, Python 2.7, Python 3.1, Python 3.2, Python 3.3, Python 3.4, Python 3.5
Added file: http://bugs.python.org/file31166/rebugtest.py

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<http://bugs.python.org/issue18662>
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