Python user login interface preparation and implementation flow chart

The code that this article will share with you is about the preparation of Python user login interface and its implementation flow chart. Interested friends can Find out more, I hope it will be helpful to you.

The implementation code is as follows:

# Author: Steven Zeng
'''
作业：编写登录接口
输入用户名密码
认证成功后显示欢迎信息
输错3次后锁定
'''
print("welcome to here")
f1=open('username.txt')
f2=open('password.txt')
f3=open('error.txt')#建立一个Demo记录输错3次密码的用户，并对其锁定
username_true=f1.readlines()#readlines读取方式返回的是逐行一个元素的列表
password_true=f2.readlines()
un_error=f3.readlines()
f1.close()
f2.close()
f3.close()
UK={}
#建立一个字典形式为用户名对密码
for i in range(len(username_true)):
    UK[str(username_true[i])]=str(password_true[i])#注：字典的键必须是不可变更型数据（常用整数和字符串）
# 而键值可以是数字也可以是字符串
#print(un_error)
#print(un_error.count(777+'\n')
#print(UK)
count=0
while count<3:
    username = input("Please, input your username:")
    password = input("Please, input your keywords")
    if un_error.count(str(username+&#39;\n&#39;))>=3:
        print("Out of trying, You are Locking!")
        break
    elif str(username+&#39;\n&#39;) in UK and str(password+&#39;\n&#39;)==UK.get(str(username+&#39;\n&#39;)):
        print("welcome to you, honorable customer!")
        break
    else:
        print(&#39;&#39;&#39;Invalid customer， please try again!
        And you have {count_left1} times left!&#39;&#39;&#39;.format(count_left1=2-count))
        f3=open(&#39;error.txt&#39;,&#39;a&#39;)#建立一个Demo记录输错3次密码的用户，并对其锁定
        f3.write(username+&#39;\n&#39;)
        f3.close()
    count += 1

Flow chart:

Related tutorials: Python video tutorial

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