Python rookie promotion----Python3 's bytes and str

The most important new feature of Python 3 is probably a clearer distinction between text and binary data .

Text is always Unicode, represented by the str type , and binary data is represented by the bytes type . Python 3 does not mix str and bytes in any implicit way, which makes the distinction between them particularly clear. You cannot stitch strings and byte packets , Search for strings in a byte packet (or vice versa), or pass a string into a function with a byte packet (or vice versa). It's a good thing.

In any case, the line between the string and the byte packet is inevitable, and the following diagram is important to keep in mind:

A string can be encoded into a byte packet, and a byte packet can be decoded into a string.

>>> "Hello". Encode ("Utf-8")                            #encode将字符串变成字节b ' \xe4\xbd\xa0\xe5\xa5\xbd ' >>> B ' \xe4\xbd\xa0\xe5\ Xa5\xbd '. Decode (' Utf-8 ')       #decode将字节变成字符串 ' Hello '

Of course, encoding can also be used in other encoding formats, such as GBK

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Python rookie promotion----Python3 's bytes and str