python regular expression match example

Personally, the main use of it to do some complex string analysis, extract the desired informationLearning principles: Enough on the line, when needed in depth The summary is as follows: Special symbols in regular expressions: "." Table any character"^" Table string Start"$" Table string end"*" "+" "?" followed by the characters, 0--Multiple, 1--Multiple, 0, or one*?, +?, ?? Match the conditions of the c

This module provides a regular expression matching operation similar to that of Perl L. The same is true for Unicode strings. The regular expression uses the backslash "\" to represent a special form or as an escape character, which conflicts with the syntax of Python, so

:^(\d{3})-(\d{3,8})$Two groups are defined separately, and the area code and local numbers can be extracted directly from the matching string: >>> m = Re.match (r ' ^ ( \D{3})-(\d{3,8}) $ ', ' 010-12345 ') >>> m0, 9), Match= ' 010-12345 ' > >>> m.group (0) ' 010-12345 ' >>> m.group (1) ' 010 ' Span class= "Hljs-prompt" >>>> m.group (2) ' 12345 ' >>> m.groups () ( ' 010 ', ' 12345 ') Through the experiment, if you do not use parentheses, the res

From a string perspective, Chinese is not as neat and standard as English, which is an unavoidable reality. This article combines the online data and personal experience, take Python language as an example, a little summary. Welcome to add or pick the wrong. A little experience you can use the repr () function to view the original format of a string. This is useful for writing

pattern match, the regular expression in Python is greedy pattern matching, it will meet the requirements of the entire expression, as much as possible to match the characters, the concrete effect is shown in the following exampl

parameters, and returns a tuple in which the tuple is defined in a regular expression.#!python>>> p = re.compile (' (A (b) c) d ')>>> m = p.match (' ABCD ')>>> m.groups ()(' abc ', ' B ')Use the index to get the appropriate group content, for example: m.groups () [0]P2=re.compile (R "' (\d) +\w", Re. X>>> p2.

'ifM is notNone:Print("Match Success") Print(M.group ())Else: Print("Match failed")Run Result: Dot match ' 0 ' match succeeded#search for a real period (decimal point), and we escaped by using a backslash for the function of the period:patt314 ='3.14' #the point number that represents the

This module provides a regular expression matching operation similar to that of Perl L. The same is true for Unicode strings.The regular expression uses the backslash "\" to represent a special form or as an escape character, which conflicts with the syntax of Python, so

"Brown", "Martin" =brown only match Martin. ( !...) Matches only if the specified expression does not match the next regular expression element, which is (= ...) The reverse operation. ( If the prefix string at the current position of the str

the entire matching string, that is, the content of the entire variable x. 15 // http://www.cnblogs.com/sosoft/16 17 string x = "Live for nothing, die for something"; 18 Regex r = new Regex (@ "^ Live for no (? (8) greedy and non-greedyThe engine of the regular expression is greedy. As long as the mode permits, it will match as many characters as possible. Add

This article mainly introduces the regular expression handler functions commonly used in Python. The syntax for the regular expressions in Python will summarize one more blog post.Re.matchRe.match tries to match a pattern from the

regular expressions to get, remove (filter), or replace HTML Tag code examples 1. Python uses a regular expression to retrieve html Zhongtian information. Example code: #! /Usr/bin/env python #-*-coding: utf8-*-import re html = "

characters. III. regular expressions 1. use the compile () function to compile regular expressions Because the python code is eventually translated into bytecode and then executed on the interpreter. Therefore, it is easier to execute regular expressions that are frequently used in our code for pre-compilation. Most