Python Chinese string interception problem

Web applications will inevitably intercept the need for strings, Python is easy to intercept English, but the interception of Utf-8 Chinese opportunity to intercept half caused some not garbled garbled. In fact, UTF8 intercept is very simple, here to share to everyone

Let's take a look at an example:

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1 2 3 4

#-*-Coding:utf8-*-s = U ' Chinese intercept ' s.decode (' UTF8 ') [0:3].encode (' UTF8 ') # results U ' Chinese interception

Extended reading:

How many bytes does the Chinese character in UTF-8 occupy?

Up to 2 bytes: 0

3 bytes: Basically equivalent to GBK, including more than 21,000 Chinese characters

4 bytes: China, Japan and Korea super large character set inside the Chinese characters, there are more than 50,000

A UTF-8 number for 1 bytes

A UTF-8 English letter for 1 bytes

Find UTF-8 encoded data found that many of the posts said UTF-8 code, a Chinese character occupies 3 bytes, and some also made a proof, probably so, create a UTF-8 encoded text file without a BOM, which saved a few Chinese characters, and then view the size of the file. I think this kind of proof is not a bit convincing, because the UTF-8 is longer, 1-6 bytes, a small number of Chinese character detection is not that all Chinese characters are true.

Later I looked at the character Map-Chinese, found the correct answer, a few are Chinese characters each occupy 3 bytes, most occupy 4 bytes.

The above mentioned is the entire content of this article, I hope you can enjoy.