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This article mainly introduces how to use Python to query and replace a text string, the article is very detailed, has a certain reference value, interested friends must read it!

How to query and replace a text string with Python?

Answer: you can use the sub () function in the re module or the subn () function to query and replace

Format: sub (replacement, string [, count=0]) (replacement is the text to be replaced, string is the text to be replaced, and count is an optional parameter, which refers to the maximum number of replacements)

> import re > p=re.compile ('blue | white | red') > print (p.sub (' colour','blue socks and redshoes')) colour socks and colourshoes > print (p.sub ('colour','blue socks and redshoes', count=1)) colour socks and redshoes

The subn () method performs the same effect as sub (), but it returns a two-dimensional array, including the new string after replacement and the total number of substitutions

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