1、非捕获分组( non-capturing group) 使用语法:(?:regex)这里的?和:都是语法的组成部分;这种分组正则表达式引擎不会捕获它所匹配的内容即不会为非捕获型分组分配组号; 样例说明:Set(?:Value)?表达式匹配SetValue或者Set,但是不能通过group(1)的方式获取Value文本串,Set(Value)?则可以获取的到 语言支持说明:jav...
() Capture and group Special Sequences A special sequence is a \ followed by one of the characters in the list below, and has a special meaning: CharacterDescriptionExampleTry it \A Returns a match if the specified characters are at the beginning of the string "\AThe" Try it » \b...
Extract capture group, multiple times finditeralso works, but you get the fullMatchobject for each capture importrepattern=r'a(\d+)'re.findall(pattern,'a1 b2 a32')# >>> ['1', '32'] Extract first occurrence of regex This matches a pattern anywhere in the string, butonly once. ...
所以你可以使用(logger\.[tdiwe]\(")[^"]*和替换字符串\1filename:123。你的代码看起来像这样：
elif('<'inhead)or('>'inhead):raiseValueError('%d: invalid rule name "%s"'%(line_num,head))try:pattern=regex_expand(defined,body,guarded=notcapture)exceptValueErrorase:raiseValueError('%d:%s'%(line_num,str(e)))try:re.compile(pattern)exceptre.error:raiseValueError('%d: invalid pattern "...
If <regex> contains more than one capturing group, then re.findall() returns a list of tuples containing the captured groups. The length of each tuple is equal to the number of groups specified:Python 1>>> re.findall(r'(\w+),(\w+)', 'foo,bar,baz,qux,quux,corge') 2[('foo...
Till this point, you might notice that all the examples capture the entire regex pattern. However, you might want to match a regex pattern but only capture a portion (or group) of it. Fortunately, regex provides a simple way of doing this by using the parenthesis(). You can define the...
The first part is ourcapturing group,(hello)— assigned to(1)because it is the first capturing group in our regex. By adding?we make this match optional (otherwise, it will only match when true). We then ask aquestion,?(1)— meaning did capture group(1)match?
output == '':32break33 self.logger.debug("read line:%s", output)34# 查找传输进度信息35 progress_match = progress_regex.search(output)36if progress_match:37 progress_val = int(progress_match.group(1))38 self.logger.debug("adb pull progress:[%d%%]", progress_val)39if callb...
()Capture and group Special Sequences A special sequence is a\followed by one of the characters in the list below, and has a special meaning: CharacterDescriptionExampleTry it \AReturns a match if the specified characters are at the beginning of the string"\AThe"Try it » ...