How to solve the problem of Python string substitution

This article focuses on "how to solve the problem of Python string substitution", interested friends may wish to take a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to solve the problem of Python string substitution.

A string replacement problem was encountered in the project.

We know that string substitution can be used directly with the replace method, but this method is only suitable for simple character substitution, as long as you know exactly what you want to replace.

For example, remove "java"

S = "java python" print (s.replace ("java", ")) # python

When you encounter a complex scene, you have to replace it with a regular expression.

For example, there is a piece of html text.

S = ""! function (e) w3i9df xxx this is the html text "

I want to get rid of the script script and leave only the html text. This can be achieved by the re.sub method in the regular expression.

Import res = ""! function (e) w3i9df xxx this is the html text "result=re.sub (r")