.stringreturns the string passed into the function .group()returns the part of the string where there was a match Example Print the position (start- and end-position) of the first match occurrence. The regular expression looks for any words that starts with an upper case "S": ...
m.string[m.start(g):m.end(g)] 注意m.start(group) 将会等于 m.end(group) ,如果 group 匹配一个空字符串的话。比如,在 m = re.search('b(c?)', 'cba') 之后,m.start(0) 为1, m.end(0) 为2, m.start(1) 和m.end(1) 都是2, m.start(2) raise 一个 IndexError 例外。 这个例子...
- `\A` matches only the start of a string. - `\Z` matches only the end of a string. - `$` matches the end of a string, and also end of a line in re.MULTILINE mode. - `^` matches the start of a string, and also start of a line in re.MULTILINE mode. 代码语言:ja...
match from the beginning of the string re.search: scan through the whole string to find a match dash '-' inside square '[]' means a range. put dash in the end to just match a dash
\b Returns a match where the specified characters are at the beginning or at the end of a word(the "r" in the beginning is making sure that the string is being treated as a "raw string") r"\bain"r"ain\b" Try it »Try it » \B Returns a match where the specified characters...
返回指定的组截获的子串在string中的起始索引(子串第一个字符的索引)。group默认值为0。 end([group]):返回指定的组截获的子串在string中的结束索引(子串最后一个字符的索引+1)。group默认值为0。 span([group]):返回(start(group), end(group))。
Python Code Editor: Have another way to solve this solution? Contribute your code (and comments) through Disqus. Write a Python program that matches a string that has an 'a' followed by anything, ending in 'b'. Next:Write a Python program that matches a word at end of string, with opt...
Regex example to split a string into words Now, let’s see how to usere.split()with the help of a simple example. In this example, we will split the target string at eachwhite-spacecharacter using the\sspecial sequence. Let’s add the+metacharacterat the end of\s. Now, The\s+reg...
^ Match start of the string, see re.MULTILINE $ Match end of the string, see re.MULTILINE [] Enclose a set of matchable chars R|S Match either regex R or regex S. () Create capture group, & indicate precedence After '[', enclose a set, the only special chars are: ...
re.MULTILINE (re.M): This flag treats^and$as the start and end of each line, not just the string. This is useful when working with multi-line strings and you want to match patterns at the start or end of each line. re.DOTALL (re.S): This flag allows the.character to match new...