Python automated Development (7): internal functions of float and long, internal functions of str, context management analysis, and internal functions of List,

Python automated Development (7): internal functions of float and long, internal functions of str, context management analysis, and internal functions of List,

Python automated Development (7): internal functions of float and long, internal functions of str, context management analysis, and internal functions of List

 

Essentially, it is an operation on strings and collections. The set has list dictionary tuples.

View which members of the class use dir ()

In addition to dir, vars () is also used in the module. Not only list members, but also what are members ....????

 

String formatting

 

This method is used for _ getattribute _ reflection.

_ Getitem __

Something useful

If you need to ** how to handle it, there is a fill character

First put utf8-> unicode --> Other

The value range is greater than or equal to 0.