段落)、table(表格)、character(字符)。我现在要分析的word文档基本都是段落和表格。本文主要讲述从word...
allows 0 or 1 word boundaries \nITEM or \n ITEM I # the first word on the line must begin with a capital I [tT][eE][mM] #then we need one character from each of the three sets this allows for unknown case \s+ # one or more white spaces this does allow for another \n not ...
Python内置的正则库 re 正则表达式(regular expression,regex)是一种用于匹配和操作文本的强大工具,它是由一系列字符和特殊字符组成的模式,用于描述要匹配的文本模式。 正则表达式可以在文本中查找、替换、提取和验证特定的模式。 正则表达式模式(pattern) 字符 普通字符和元字符 大多数字母和符号都会简单地匹配自身。例如...
字符与字符类(characters and character classes) 最简单的表达式就是字面意义上的字符,比如a或5,如果没有显式地指定量词, 就默认为“匹配一次”。比如,tune这一 regex包含了 4个表达式,每个都隐式地定量为匹配一次,因此,tune可以匹配的是t后跟随u,再之后是n,然后是...
\s -- (lowercase s) matches a single whitespace character -- space, newline, return, tab, form [ \n\r\t\f]. \S (upper case S) matches any non-whitespace character. \t, \n, \r -- tab, newline, return \d -- decimal digit [0-9] (some older regex utilities do not support...
5.1 字符集Character Classes 5.2 限定符Quantifiers(数量表示) 5.3 基本字符Basic Characters 5.4 集合Sets 5.5 分组Groups 5.6 断言Assertions 5.7 标志位Flags 正则表达式速查表 六、Python RegEx functions and methods常用函数及方法 七、常用正则表达式示例 八、Python正则表达式练习案例 正则表达式参考网站 1.Python官...
Regex$dollar metacharacter This time we are going to have a look at the dollar sign metacharacter, which does the exact opposite of the caret (^) . In Python, The dollar ($) operator or sign matches the regular expression patternat the end of the string.Let’s test this by matching ...
\sReturns a match where the string contains a white space character"\s"Try it » \SReturns a match where the string DOES NOT contain a white space character"\S"Try it » \wReturns a match where the string contains any word characters (characters from a to Z, digits from 0-9, an...
\$amatch if a string contains$followed bya. Here,$is not interpreted by a RegEx engine in a special way. If you are unsure if a character has special meaning or not, you can put\in front of it. This makes sure the character is not treated in a special way. ...
re.escape(<regex>) returns a copy of <regex> with each nonword character (anything other than a letter, digit, or underscore) preceded by a backslash.This is useful if you’re calling one of the re module functions, and the <regex> you’re passing in has a lot of special characters...