Python|使用正则表达式匹配包含“g”后跟一个或多个 e 的单词的程序

先决条件：正则表达式 |第 1 组，第 2 组

给定一个字符串，任务是检查该字符串是否包含任何g后跟一个或多个e ，否则，打印 No match。

例子：

Input : geeks for geeks
Output : geeks 
         geeks

Input : graphic era
Output : No match

方法：首先，创建一个正则表达式（regex）对象来匹配一个包含'g'后跟一个或多个e的单词，然后在findall方法中传递一个字符串。此方法返回匹配字符串的列表。循环遍历列表并打印每个匹配的单词。

\w – represent Any letter, numeric digit, or the underscore character.
* means zero or more occurrence of the character.
+ means one or more occurrence of the character.

编程需要懂一点英语

下面是实现：

# Python program that matches a word
# containing ‘g’ followed by one or
# more e’s using regex
  
# import re packages
import re
  
# Function check if the any word of
# the string containing 'g' followed
# by one or more e's
def check(string) :
  
      
    # Regex \w * ge+\w * will match 
    # text that contains 'g', followed 
    # by one or more 'e'
    regex = re.compile("ge+\w*")
  
    # The findall() method returns all 
    # matching strings of the regex pattern
    match_object = regex.findall(string)
  
    # If length of match_object is not
    # equal to zero then it contains
    # matched string
    if len(match_object) != 0 :
  
        # looping through the list
        for word in match_object :
            print(word)
              
    else :
        print("No match")
  
  
# Driver Code     
if __name__ == '__main__' :
  
    # Enter the string
    string = "Welcome to geeks for geeks"
  
    # Calling check function
    check(string)

输出：

geeks
geeks