Python-yield ternary operation Lambda expression

Yield (saves the execution state of the function)

A function with yield is a generator, which, unlike a normal function, generates a generator that looks like a function call, but does not execute any function code until it calls next () (which is automatically called next () in the For loop) to begin execution. Although the execution process still executes according to the process of the function, each execution to a yield statement is interrupted and an iteration value is returned, and the next execution proceeds from the next statement of yield. It looks as if a function was interrupted several times by yield during normal execution, and each break returns the current iteration value through yield.

The benefits of yield are obvious, and the ability to rewrite a function into a generator yields an iterative capability that computes the value of the next next () rather than the instance of the class, not only the code is concise, but the execution process is exceptionally clear.

#!usr/bin/env python#Coding:utf-8defReadLines (): Seek=0" "Start Position" "     whileTrue:with Open ('E:/temp.txt','R') as F:f.seek (seek) data=F.readline ()ifData:seek=F.tell ()" "finish reading the last position as the next first position" "                yieldDataElse:                return  forIteminchreadlines ():PrintItem

Ternary operation Judgment (simplified code)

temp=Noneif 1>3:    Temp='gt'else:    Temp='lt'    restult='gt' if Else ' LT ' Print Restult

Lambda expressions do operations (simplify code)

def foo (x, y    , z): return x*y+zprint foo (1,3,4) Temp=Lambda x,y,z:x*y+z  Print temp (1,3,4)

Python-yield ternary operation Lambda expression