python 补前导零_Python正则表达式| 程序从IP地址中删除前导零

python 补前导零

Given an IP address as input, write a Python program to remove leading zeros from it.

给定一个IP地址作为输入，编写一个Python程序以从中删除前导零。

Examples:

例子：

    Input:  216.08.094.196
Output: 216.8.94.196
Input: 216.08.004.096
Output: 216.8.4.96

In this program, we are using sub() method of "re" module.

在此程序中，我们使用“ re”模块的 sub()方法 。

Syntax:

句法：

    re.sub(pattern, repl, string, count=0, flags=0)

The sub() in the function stands for SubString, a certain regular expression pattern is searched in the given string(3^rd parameter), and upon finding the substring pattern is replaced by repl(2^nd parameter), count checks and maintains the number of times this occurs.

在功能子()代表子串，一个特定正则表达式模式中搜索给定的字符串( ^第三参数)中，并在找到的子图案由^REPL(第2参数)代替，计数检查和维护数这种情况经常发生。

Code

码

# Python program to Remove leading zeros from an IP address
# import re module
# re module provides support
# for regular expressions
import re
# Make a regular expression for 
# finding leading zeros in ip address
regex = '\.[0]*'
# Define a function for Remove
# leading zeros from an IP address
def removeLeadingZeros(ip):
modified_ip = re.sub(regex, '.', ip)
print(modified_ip)
# Main code 
if __name__ == '__main__' : 
# Enter ip address 
ip = "216.08.094.196"
# call function 
removeLeadingZeros(ip)
ip = "216.08.004.096"
removeLeadingZeros(ip)

Output

输出量