match("dog", 1) # Match as "o" is the 2nd character of "dog". <re.Match object; span=(1, 2), match='o'> 如果你想定位匹配在 string 中的位置,使用 search() 来替代(另参考 search() vs. match())。 Pattern.fullmatch(string[, pos[, endpos]]) 如果整个 string 匹配这个正则表达式...
绝大部分重要的应用,总是会先将正则表达式编译,之后在进行操作。 在3.6 版更改: 标志常量现在是RegexFlag类的实例,这个类是enum.IntFlag的子类。 re.compile(pattern,flags=0) 将正则表达式的样式编译为一个正则表达式对象(正则对象),可以用于匹配,通过这个对象的方法match(),search()以及其他如下描述。 这个表达式...
any character, * any character zero or more times txt = '''Apple and banana are fruits''' matches = re.findall(regex_pattern, txt) print(matches) # ['and banana are fruits'] 零次或一次(?) 零次或一次。该模式可能不会出现,也可能只出现一次。 txt = '''I am not sure if there is...
>>> pattern = re.compile("o") >>> pattern.match("dog") # No match as "o" is not at the start of "dog". >>> pattern.match("dog", 1) # Match as "o" is the 2nd character of "dog". <re.Match object; span=(1, 2), match='o'> Pattern.search(string[, pos[, endpos]...
match metacharacters inside the character class 4[\^\.-+*/]\d 4^3 4.2 44 23 Repetition Rather than matching single instances of characters, you can match repeated characters. Syntax Description Example pattern Example matches Example non-matches x* match zero or more times ar...
... """ >>> regex.findall(text) ['support@example.com', 'sales@example.com'] The pattern variable holds a raw string that makes up a regular expression to match email addresses. Note how the string contains several backslashes that are escaped and inserted into the resulting string as ...
match.groupdict(default=None)Returns a dictionary of named captured groups.match.groupdict() returns a dictionary of all named groups captured with the (?P<name><regex>) metacharacter sequence. The dictionary keys are the group names and the dictionary values are the corresponding group values:...
import re regex = re.compile(r'coop') # 正则匹配替换 regex.sub('$$$','sdl...
. This special sequence can only be used to match one of the first 99 groups. If the first digit ofnumberis 0, ornumberis 3 octal digits long, it will not be interpreted as a group match, but as the character with octal valuenumber. Inside the'['and']'of a character class, all ...
re.ASCII同re.A,对应的内联标识为(?a),用于向后兼容。使元字符\w, \W, \b, \B, \d, \D, \s和\S仅匹配ASCII字符。该模式只在string模式下有意义,在byte模式...