Random generation of verification codes and transactions in Python

1. Randomly generated verification code

# import random# print (Random.random ()) #0-1 of decimal # Print (Random.randint (1,3)) #包括1和3 # Print ("--", Random.randrange (1,3)) #不包括1和3 #随机生成四位验证码import Randomcheckcode="' forIinchRange4): current= Random.randrange (0,4)    ifCurrent! =i:temp= Chr (Random.randint ( $, -))    Else: Temp= Random.randint (0,9) Checkcode+=Str (temp) print (checkcode) #KS3G #随机生成8位验证码importstringPrint (string. Ascii_lowercase) #abcdefghijklmnopqrstuvwxyzprint (string. Digits) #0123456789obj= Random.sample (string. ascii_lowercase+string. Digits,8) print (obj) #['I','m','o','9','6','P','g','0']row="". Join (Random.sample (string. ascii_lowercase+string. Digits,8) ) print (row) #417x6kyt

A. Case one:

Try:     fromdjango.db Import transaction with Transaction.atomic (): Models. UpDown.objects.create (user_id=user_id,article_id=article_id,up=False) models. Article.objects.filter (Nid=article_id). Update (Down_count=f ('Down_count')+1) except Exception ase:response['Status'] =False response['msg'] = str (e)

B. Case two:

#函数里面有数据库操作, add to the function  from django.db.transaction Import Atomic @atomicdef cmd (self):    model ...    .. Model ... ..

Random generation of verification codes and transactions in Python