def search(pattern, string, flags=0):"""Scan through string looking for a match to the pattern, returning a match object, or None if no match was found."""return _compile(pattern, flags).search(string) 3. findall(pattern, string, flags=0) match和search均用于匹配单值,即:只能匹配字符串...
用操作符in 判断。
1. match(pattern, string, flags=0) 从字符串的开头进行匹配, 匹配成功就返回一个匹配对象,匹配失败就返回None flags的几种值 X 忽略空格和注释 I 忽略大小写的区别 case-insensitive matching S . 匹配任意字符,包括新行 match(pattern, string, flags=0) 2. search(pattern, string, flags=0) 浏览整个字...
lookahead = re.search(r"\b\w+(?= string)", text) # Word before ' string' lookbehind = re.search(r"(?<=Search )\w+", text) # Word after 'Search ' if lookahead: print(lookahead.group()) if lookbehind: print(lookbehind.group()) 11. Flags to Modify Pattern Matching Behavior To...
I IGNORECASE Perform case-insensitive matching. L LOCALE Make \w, \W, \b, \B, dependent on the current locale. M MULTILINE "^" matches the beginning of lines (after a newline) as well as the string. "$" matches the end of lines (before a newline) as well ...
re.search(pattern, string [, flags]) 这个方法用来测试正则表达式pattern能否在string中找到匹配,flags是可选参数是匹配模式(aiLmsux)的按位OR结果。如果能找到匹配,则返回MatchObject,否则返回None。 re.match(pattern, string [, flags]) re.match()和re.search()非常相似,参数相同,返回值也行通,非常容易混...
If it is a callable, it's passed the match object and must return a replacement string to be used. template(pattern, flags=0) Compile a template pattern, returning a pattern object 1) 单项查找函数 查找一个匹配项的函数有3个: search: 查找任意位置的匹配项 match: 必须从字符串开头匹配 ...
Just join the word_list with | as delimiter. (?i) case-insensitive modifier helps to do a case-insensitive match. for line in shakes: if re.search(r"(?i)"+'|'.join(word_lst), line): print line, Example: >>> f = ['hello','foo','bar'] ...
pattern=re.compile(old,re.IGNORECASE)new_string=pattern.sub(new,string)returnnew_stringif__name__=="__main__":string="Hello World"old="World"new="Python"new_string=case_insensitive_replace(string,old,new)print(new_string) 方法三:使用字符串库 ...
Regex search groups or multiple patterns Search multiple words using regex Case insensitive regex search How to usere.search() Before moving further, let’s see the syntax of it. Syntax re.search(pattern, string, flags=0) The regular expression pattern and target string are the mandatory argume...