Python 2.5 quick reference |  |
Python 2.5 quick reference | |
Note: The raw string notation
r'...' is most useful
for regular expressions; see
raw strings,
above.
These characters have special meanings in regular expressions:
. | Matches any character except a newline. |
^ | Matches the start of the string. |
$ | Matches the end of the string. |
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Matches zero or more repetitions of regular
expression |
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Matches one or more repetitions of |
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Matches zero or one |
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Non-greedy form of *
operator is greedy: it matches as much text as
possible.
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Non-greedy form of |
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Non-greedy form of |
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Matches from r'x{3,5}' matches between three and five
copies of letter 'x'; r'(bl){4}' matches the string 'blblblbl'.
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| Non-greedy version of the previous form. |
[...]
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Matches one character from a set of characters. You
can put all the allowable characters inside the
brackets, or use r'[abc]' will match either
'a', 'b', or 'c'. Pattern r'[0-9a-zA-Z]'
will match any single letter or digit.
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[^...]
| Matches any character not in the given set. |
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Matches expression |
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Matches either |
(
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Matches MatchObject, below. Groups are numbered starting from
1.
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(?:
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Matches |
(?P<
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Matches |
These special sequences are recognized:
\
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Matches the same text as a group that matched earlier,
where r'([a-zA-Z]+):\1' matches the string "foo:foo".
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\A
| Matches only at the start of the string. |
\b
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Matches the empty string but only at the start or end
of a word (where a word is set off by whitespace or a
non-alphanumeric character). For example, r'foo\b' would match "foo" but
not "foot".
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\B
| Matches the empty string when not at the start or end of a word. |
\d
| Matches any digit. |
\D
| Matches any non-digit. |
\s
| Matches any whitespace character. |
\S
| Matches any non-whitespace character. |
\w
| Matches any alphanumeric character. |
\W
| Matches any non-alphanumeric character. |
\Z
| Matches only at the end of the string. |
\\
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Matches a backslash (\) character.
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