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→Regular Expressions
== Regular Expressions ==
== Regular Expressions ==
<nowiki>
<nowiki>
^ → Matches the beginning of a line
^ → Matches the beginning of a line
$ → Matches the end of a line
$ → Matches the end of a line
. → Matches any character
. → Matches any character
\s → Matches any whitespace
\s → Matches any whitespace
\S → Matches any non-whitespace
\S → Matches any non-whitespace
* → Repeats a character 0 or more times
* → Repeats a character 0 or more times
*? → Repeats a character 0 or more times (non-greedy)
*? → Repeats a character 0 or more times (non-greedy)
+ → Repeats a character 1 or more times
+ → Repeats a character 1 or more times
+? → Repeats a character 1 or more times (non-greedy)
+? → Repeats a character 1 or more times (non-greedy)
[aeiou] → Matches a single character in the listed set
[aeiou] → Matches a single character in the listed set
[^XYZ] → Matches a single character NOT in the listed set
[^XYZ] → Matches a single character NOT in the listed set
[a-z0-9] → The set of characters can include a range
[a-z0-9] → The set of characters can include a range
( → Indicates where string extraction is to start
( → Indicates where string extraction is to start
) → Indicates where string extraction is to end</nowiki>
) → Indicates where string extraction is to end</nowiki>
\ → Escape character
\ → Escape character
=== Regular Expression Module ===
=== Regular Expression Module ===
It must be imported at the begining of a program:
It must be imported at the begining of a program:
print line
print line
</source>
</source>
== Files ==
== Files ==
== Class ==
== Class ==
== MySQLdb ==
== MySQLdb ==
== os.system() ==
== os.system() ==