如何使用python regex从字符串中删除指定的模式？

Question

Here is my string '2018-01-31 05:29:37 | Jan Pong Lee | [Number of contacts]:1' '2018-01-31 05:29:37 | Jan Pong Lee | [Number of contacts]:1'

I would like to remove '| Jan Pong Lee |' '| Jan Pong Lee |' . The name can have 2 or 4 words, is there a way to do that?

Answer 1

You can use this regex to match and replace it with empty string,

\|[^|]*\|

Explanation of this regex: This regex basically captures a | followed by any character (except | ) zero or more times and finally captures a | character and then stops capturing and replaces all matched characters with empty string.

Live Demo

Here is the python code for same,

import re

s = '2018-01-31 05:29:37 | Jan Pong Lee | [Number of contacts]:1'
ret = re.sub(r'\|[^|]*\|', '', s)
print (ret)

Which prints the remaining string after removal of | Jan Pong Lee | | Jan Pong Lee | . This will work no matter whatever number of words you have inside those pipes.

2018-01-31 05:29:37  [Number of contacts]:1

Answer 2

Here is solution:

old_str =  '2018-01-31 05:29:37 | Jan Pong Lee | [Number of contacts]:1'
new_str = "{} | {}".format(old_str.split('|')[0], old_str.split('|')[2])