10. Python string concatenation and formatting

Let's look at the splicing at runtime:

In addition to this formatting, we have learned that sprintf of C language can format and output a string, and set this through some formatting fields;
we also have such a syntax in python:

String length: It

can be seen that the corresponding Chinese characters and ASCII codes actually occupy 1 bit. The function len obtains not the size of the space, but the entire number of words.