Explore the use of encode and decode (Python)

A lot of times when you write a Python program, you add such a line of code to your head.

# Coding:utf-8

Or is that so?

# -*-coding:utf-8-*-

Wait a minute

This line of code means that the same encoding format is set to Utf-8

The data stored in the computer is encoded in various ways, such as Unicode, Utf-8, GBK, etc.

Under Windows System, the text file should be saved by default in the format GBK

When you save a file in an encoded format, you should use the same encoding to parse the file, or it may appear garbled

Today I want to record what I'm doing when I write a Python program, when I use decode when parsing string strings, when to use encode

Typically convert from non-Unicode encoding to Unicode encoding using decode (decode), instead of converting from Unicode encoding to non-Unicode encoding using encode (encoding)

# Coding:utf-8  = [' hello ']print L  

Output

Now it's utf-8 encoding, a kanji account of 3 bytes

Use decode to decode and convert "Hello" encoding to Unicode

# Coding:utf-8  = [' hello ']print [L[0].decode ('utf-8') 

Output

You can see that the success is converted to Unicode encoding, and a kanji account is 2 bytes

So now I want to convert utf-8 encoded "Hello" to gbk how to do it?

Try this.

# Coding:utf-8  = [' hello ']print [L[0].encode ('gbk') )]  # Error Example

An error has occurred

The correct way is to convert Utf-8 to Unicode using decode, and convert Unicode using encode to the desired encoding GBK

# Coding:utf-8  = [' hello ']print [L[-1].decode ('utf-8') ). Encode ('gbk')]   #  utf-8, Unicode-GBK

Output

Successfully converted to GBK encoding, and a kanji account of 2 bytes

Summary :

(non-Unicode encoding). Decode (' non-Unicode ') converted to Unicode

(Unicode encoding). Encode (' non-Unicode ') conversion to non-Unicode

If you want to convert from a non-Unicode encoding to another non-Unicode encoding, you need to use Unicode as a springboard for decode, and then encode

The end of this section ...

Explore the use of encode and decode (Python)