Python Study the next day

Dict Dictionary

Putting data into dict: assigning directly, initializing

Pop Delete key

Set Set

add element

Remove delete Element

The string str is an immutable object, and the operation of the string will return a new string

Pass doesn't do anything.

You can set a default parameter, but it must be an immutable object

*number Passing in mutable parameters

Tail recursion refers to calling the function itself when the function returns.

Slicing operation is a little bit interesting

The function itself is also a variable, can be assigned, just like JS

The function name is also a variable, it's hard to imagine, it's a little free.

Abstract function Map reduce sorted is a particularly good function of encapsulation

Closure notation returns a function

Support for anonymous functions

Python Study the next day