compile(r".*(.).*\1") >>> pair.match("717ak").group(1) '7' # Error because re.match() returns None, which doesn't have a group() method: >>> pair.match("718ak").group(1) Traceback (most recent call last): File "<pyshell#23>", line 1, in <module> re.match(r"....
print(x.span()) 示例:打印传递给函数的字符串: importre txt ="The rain in Spain" x = re.search(r"\bS\w+", txt) print(x.string) 示例:打印存在匹配项的字符串部分。正则表达式查找以大写字母 "S" 开头的任何单词: importre txt ="The rain in Spain" x = re.search(r"\bS\w+", txt) ...
using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string input = "plum-pear"; string pattern = "(-)"; string[] substrings = Regex.Split(input, pattern); // Split on hyphens foreach (string match in subst...
pour inverser « i » et « e » dans la chaîne correspondante. Les mots restants restent inchangés. C# Copier Exécuter using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string input = "deceive relieve achieve belief fierce rec...
str = re.finditer(r"\d+","I18 want15 to13 go15 to school")#\d返回的是数字 for match in str: print(match.group()) 1. 2. 3. 4. split() 返回一个列表,其中字符串在每次匹配时被拆分 1. 实例:在每个空白字符处进行拆分 import re ...
A character in the range: a-z or A-Z [a-zA-Z] Any single character . Alternate - match either a or b a|b Any whitespace character \s Any non-whitespace character \S Any digit \d Any non-digit \D Any word character \w
using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string input = "plum-pear"; string pattern = "(-)"; string[] substrings = Regex.Split(input, pattern); // Split on hyphens foreach (string match in substrings) { Console.WriteLine("...
In[1]:r'\w''\\w'In[2]:'\\w'\wIn[2]:print(r'\n')\nIn[3]:print('\n')#输出了看不见的换行符,而不是字符`\n` 6.Negative Character Class #要java不要javascriptpattern=r'[Jj]ava[^Ss]' \d数字匹配符 digit,与[0-9]作用相同 ...
In general, the caret symbol represents the start of the string, but when it is typed after the opening square bracket it negates the character set. For example, the regular expression[^c]armeans: any character exceptc, followed by the charactera, followed by the letterr. ...
这个模式与"Who kept all of this cash in a bucket"匹配,与"buckets"不匹配。字符^和$同时使用时,表示精确匹配(字符串与模式一样)。例如: ^bucket$ 只匹配字符串"bucket"。如果一个模式不包括^和$,那么它与任何包含该模式的字符串匹配。例如:模式 ...