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| author | Serhiy Storchaka <storchaka@gmail.com> | 2017-04-13 18:06:43 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2017-04-13 18:06:43 (GMT) |
| commit | 5908300e4b0891fc5ab8bd24fba8fac72012eaa7 (patch) | |
| tree | 78b1b58197c890909b9d153a7988105498d56659 /Doc/library | |
| parent | a6e395dffadf8c5124903c01ad69fefa36b1a935 (diff) | |
| download | cpython-5908300e4b0891fc5ab8bd24fba8fac72012eaa7.zip cpython-5908300e4b0891fc5ab8bd24fba8fac72012eaa7.tar.gz cpython-5908300e4b0891fc5ab8bd24fba8fac72012eaa7.tar.bz2 | |
bpo-29995: re.escape() now escapes only special characters. (#1007)
Diffstat (limited to 'Doc/library')
| -rw-r--r-- | Doc/library/re.rst | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/Doc/library/re.rst b/Doc/library/re.rst index 3213daf..ce90ec7 100644 --- a/Doc/library/re.rst +++ b/Doc/library/re.rst @@ -786,7 +786,7 @@ form. .. function:: escape(pattern) - Escape all the characters in *pattern* except ASCII letters, numbers and ``'_'``. + Escape special characters in *pattern*. This is useful if you want to match an arbitrary literal string that may have regular expression metacharacters in it. For example:: @@ -795,15 +795,19 @@ form. >>> legal_chars = string.ascii_lowercase + string.digits + "!#$%&'*+-.^_`|~:" >>> print('[%s]+' % re.escape(legal_chars)) - [abcdefghijklmnopqrstuvwxyz0123456789\!\#\$\%\&\'\*\+\-\.\^_\`\|\~\:]+ + [abcdefghijklmnopqrstuvwxyz0123456789!\#\$%&'\*\+\-\.\^_`\|~:]+ >>> operators = ['+', '-', '*', '/', '**'] >>> print('|'.join(map(re.escape, sorted(operators, reverse=True)))) - \/|\-|\+|\*\*|\* + /|\-|\+|\*\*|\* .. versionchanged:: 3.3 The ``'_'`` character is no longer escaped. + .. versionchanged:: 3.7 + Only characters that can have special meaning in a regular expression + are escaped. + .. function:: purge() |