Python Learning Notes (yield and adorner)

Yeild: Returns a Generator object;

Adorner: itself is a function that functions to decorate other functions (calling other functions)

Function: Enhance the function of the decorated function

Adorners generally accept a function object as a parameter, so that it can be enhanced

@ The original function name to invoke other functions

Recursion: Recursive requires boundary condition, recursive forward segment and recursive return segment;

10*9*8*7*6*5*4*3*2*1

10*9

10* (10-1) * (10-1)-1)

Co-process:

Design Specifications for Functions:

Coupling:

(1) The input is accepted by the parameter, and the output is produced by return to ensure the independence of the function;

(2) Minimizing the use of global variables for inter-function communication;

(3) Do not modify the parameters of the variable type in the function;

(4) Avoid directly changing the variables defined in another module;

Polymerization of

(1) Each function should have a single, unified goal;

(2) The function of each function should be relatively simple;

Exercises:

1: Each line in the/etc/passwd file is divided into a list;

2: Separate each row into a list by user-specified delimiter;

3: Use the Folding method (reduce) to find factorial;

Python Learning Notes (yield and adorner)