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findall(pattern, string [,flags])
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Returns a list of all nonoverlapping matches of pattern in string, including empty matches If the pattern has groups, a list of the text matched by the groups is returned
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If more than one group is used, each item in the list is a tuple containing the text for each group flags has the same meaning as for compile()
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finditer(pattern, string, [, flags])
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The same as findall(), but returns an iterator object insteadThe iterator returns items of type MatchObject
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match(pattern, string [, flags])
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Checks whether zero or more characters at the beginning of string match pattern Returns a MatchObject on success or None otherwise flags has the same meaning as for compile()
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search(pattern, string [, flags])
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Searches string for the first match of pattern flags has the same meaning as for compile() Returns a MatchObject on success or None if no match was found
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split(pattern, string [, maxsplit = 0])
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Splits string by the occurrences of pattern Returns a list of strings including the text matched by any groups in the pattern maxsplit is the maximum number of splits to perform By default, all possible splits are performed
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sub(pattern, repl, string [, count = 0])
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Replaces the leftmost nonoverlapping occurrences of pattern in string by using the replacement repl repl can be a string or a function If it s a function, it s called with a MatchObject and should return the replacement string If repl is a string, backreferences such as '\6' are used to refer to groups in the patternThe sequence '\g<name>' is used to refer to a named group count is the maximum number of substitutions to perform By default, all occurrences are replaced Although these functions don t accept a flags parameter like compile(), the same effect can be achieved by using the ( iLmsux) notation described earlier in this section
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subn(pattern, repl, string [, count = 0])
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Same as sub(), but returns a tuple containing the new string and the number of substitutions
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Regular Expression Objects
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A compiled regular-expression object, r, created by the compile() function has the following methods and attributes:
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rflags
The flags argument used when the regular expression object was compiled, or 0 if no flags were specified
rgroupindex
A dictionary mapping symbolic group names defined by r'( P<id>)' to group numbers
rpattern
The pattern string from which the regular expression object was compiled
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rfindall(string [, pos [, endpos]])
Identical to the findall() function pos and endpos specify the starting and ending positions for the search
rfinditer(string [, pos [, endpos]])
Identical to the finditer() function pos and endpos specify the starting and ending positions for the search
rmatch(string [, pos] [, endpos])
Checks whether zero or more characters at the beginning of string match pos and endpos specify the range of string to be searched Returns a MatchObject for a match and returns None otherwise
rsearch(string [, pos] [, endpos])
Searches string for a match pos and endpos specify the starting and ending positions for the search Returns a MatchObject for a match and returns None otherwise
rsplit(string [, maxsplit = 0])
Identical to the split() function
rsub(repl, string [, count = 0])
Identical to the sub() function
rsubn(repl, string [, count = 0])
Identical to the subn() function
Match Objects
The MatchObject instances returned by search() and match() contain information about the contents of groups as well as positional data about where matches occurred A MatchObject instance, m, has the following methods and attributes:
mexpand(template)
Returns a string that would be obtained by doing regular-expression backslash substitution on the string template Numeric back-references such as "\1" and "\2" and named references such as "\g<n>" and "\g<name>" are replaced by the contents of the corresponding group Note that these sequences should be specified using raw strings or with a literal backslash character such as r'\1' or '\\1'
mgroup([group1, group2, ])
Returns one or more subgroups of the matchThe arguments specify group numbers or group names If no group name is given, the entire match is returned If only one group is given, a string containing the text matched by the group is returned Otherwise, a tuple containing the text matched by each of the requested groups is returned An IndexError is raised if an invalid group number or name is given
mgroups([default])
Returns a tuple containing the text matched by all groups in a pattern default is the value returned for groups that didn t participate in the match (the default is None)