How to solve the problem of invalid replacement of python replace function

This article mainly explains "how to solve the problem of invalid replacement of python replace function". The explanation in this article is simple and clear, easy to learn and understand. Please follow the ideas of Xiaobian and study and learn "how to solve the problem of invalid replacement of python replace function" together!

str = "hello,china! "str.replace("hell","well")print(str)

hello，China!

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When writing code, I found that after such replacement, there was no replacement success.

Reason:

Strings are immutable objects in Python.

So the string replace needs to be reassigned to generate a new object.

There was no re-reference before, so the variable pointed to the previous object, which had actually changed, but it was not re-referenced.

So to print out the replaced string, you need to re-assign it, as follows:

str = "hello,china! "str = str.replace("hell","well")print(str)

hello,china!

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This way you can replace it successfully!

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