用Python实现账号密码登录

准备

无需数据库

程序简介

运行这个程序，注册后哪怕重新运行，注册的账号依然存在，我们可以把账号密码分别保存到2个txt中，使用的时候再读取txt

为了安全起见，我们可以对账号密码进行加密，在进行保存，读取时也将用户输入的内容进行加密，在进行读取，加密代码如下：

add = 0
s = 1
str_add = ''
inv_str_add = ''
buf = input('请输入账号：')
for i in buf:add += ord(i)str_add += str(ord(i))
for i in str_add:s += 1
for i in range(1, s):inv_str_add += str_add[-i]
print('加密前：{}\n加密后：{}' .format(buf, add + int(inv_str_add)))

因为要考虑周全，所以总体代码较长，代码如下：

s = input('您有账号吗（有回“1”，没有回“2”）：')
if s == '2':print('正在为您注册账号···')add = 0s = 1str_add = ''inv_str_add = ''bu = input('请输入您的新用户名：')for i in bu:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a1 = ('{}{}' .format(bu, add + int(inv_str_add)))p = input('请输入您的密码：')i = input('请再次输入您的密码：')if p==i:print('好的，已为您自动登录')e = open('用户名.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e.write(a1)e.write('\n')e.close()add = 0s = 1str_add = ''inv_str_add = ''for i in p:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a = ('{}{}' .format(p, add + int(inv_str_add)))e1 = open('密码.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e1.write(a)e1.write('\n')e1.close()print(1)else:print('两次密码不一致，请重新输入')while True:print('正在为您注册账号···')add = 0s = 1str_add = ''inv_str_add = ''bu = input('请输入您的新用户名：')for i in bu:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a1 = ('{}{}' .format(bu, add + int(inv_str_add)))p = input('请输入您的密码：')i = input('请再次输入您的密码：')if p==i:print('好的，已为您自动登录')e = open('用户名.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e.write(a1)e.write('\n')e.close()add = 0s = 1str_add = ''inv_str_add = ''for i in p:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a = ('{}{}' .format(p, add + int(inv_str_add)))e1 = open('密码.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e1.write(a)e1.write('\n')e1.close()breakprint(1)else:print('两次密码不一致，请重新输入')
if s =='1':add = 0s = 1str_add = ''inv_str_add = ''bu = input('请输入您的用户名：')for i in bu:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]d = ('{}{}' .format(bu, add + int(inv_str_add)))u = open('用户名.txt','r')h = u.read()if d in h:add = 0s = 1str_add = ''inv_str_add = ''bu = input('请输入您的密码：')for i in bu:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]j = ('{}{}' .format(bu, add + int(inv_str_add)))e1 = open('密码.txt','r')f = e1.read()e1.close()if j in f:print('登录成功！')print(1)else:print('密码错误')add = 0s = 1str_add = ''inv_str_add = ''bu = input('请再次输入：：')for i in bu:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]qw = ('{}{}' .format(bu, add + int(inv_str_add)))if qw in f:print('登录成功')print(1)else:print('正在为您注册账号···')add = 0s = 1str_add = ''inv_str_add = ''bu = input('请输入您的新用户名：')for i in bu:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]y = ('{}{}' .format(bu, add + int(inv_str_add)))p = input('请输入您的密码：')i = input('请再次输入您的密码：')if p==i:e = open('用户名.txt','a+')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e.write(y)e.write('\n')e.close()add = 0s = 1str_add = ''inv_str_add = ''for i in p:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]rt = ('{}{}' .format(p, add + int(inv_str_add)))e1 = open('密码.txt','a+')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e1.write(rt)e1.write('\n')e1.close()print(1)else:print('两次密码不一致，请重新输入')while True:print('正在为您注册账号···')add = 0s = 1str_add = ''inv_str_add = ''bu = input('请输入您的新用户名：')for i in bu:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a1 = ('{}{}' .format(bu, add + int(inv_str_add)))p = input('请输入您的密码：')i = input('请再次输入您的密码：')if p==i:print('好的，已为您自动登录')e = open('用户名.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e.write(a1)e.write('\n')e.close()add = 0s = 1str_add = ''inv_str_add = ''for i in p:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a = ('{}{}' .format(p, add + int(inv_str_add)))e1 = open('密码.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e1.write(a)e1.write('\n')e1.close()breakprint(1)else:print('两次密码不一致，请重新输入')else:print('对不起，没有查询到此账号')n = input('您是否需要注册账号，（回答‘是’或‘否’）:')if n =='是' :print('两次密码不一致，请重新输入')while True:print('正在为您注册账号···')add = 0s = 1str_add = ''inv_str_add = ''bu = input('请输入您的新用户名：')for i in bu:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a1 = ('{}{}' .format(bu, add + int(inv_str_add)))p = input('请输入您的密码：')i = input('请再次输入您的密码：')if p==i:print('好的，已为您自动登录')e = open('用户名.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e.write(a1)e.write('\n')e.close()add = 0s = 1str_add = ''inv_str_add = ''for i in p:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a = ('{}{}' .format(p, add + int(inv_str_add)))e1 = open('密码.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e1.write(a)e1.write('\n')e1.close()breakprint(1)else:print('两次密码不一致，请重新输入')while True:print('正在为您注册账号···')add = 0s = 1str_add = ''inv_str_add = ''bu = input('请输入您的新用户名：')for i in bu:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a1 = ('{}{}' .format(bu, add + int(inv_str_add)))p = input('请输入您的密码：')i = input('请再次输入您的密码：')if p==i:print('好的，已为您自动登录')e = open('用户名.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e.write(a1)e.write('\n')e.close()add = 0s = 1str_add = ''inv_str_add = ''for i in p:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a = ('{}{}' .format(p, add + int(inv_str_add)))e1 = open('密码.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e1.write(a)e1.write('\n')e1.close()breakprint(1)else:print('两次密码不一致，请重新输入')else:while True:add = 0s = 1str_add = ''inv_str_add = ''bu = input('请输入 用户名：')for i in bu:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]d = ('{}{}' .format(bu, add + int(inv_str_add)))u = open('用户名.txt','r')h = u.read()u.close()e1 = open('密码.txt','r')h1 = e1.read()e1.close()if d in h:add = 0s = 1str_add = ''inv_str_add = ''bu = input('请输入密码：')for i in bu:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]j = ('{}{}' .format(bu, add + int(inv_str_add)))if j in h1:print('登录成功！')breakprint(1)else:print('正在为您注册账号···')add = 0s = 1str_add = ''inv_str_add = ''bu = input('请输入您的新用户名：')for i in bu:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a1 = ('{}{}' .format(bu, add + int(inv_str_add)))p = input('请输入您的密码：')i = input('请再次输入您的密码：')if p==i:print('好的，已为您自动登录')e = open('用户名.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e.write(a1)e.write('\n')e.close()add = 0s = 1str_add = ''inv_str_add = ''for i in p:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a = ('{}{}' .format(p, add + int(inv_str_add)))e1 = open('密码.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e1.write(a)e1.write('\n')e1.close()breakprint(1)else:print('两次密码不一致，请重新输入')else:print('对不起，没有查询到此账号')n = input('您是否需要注册账号，（回答‘是’或‘否’）:')if n =='是' :print('对不起，没有查询到此账号')n = input('您是否需要注册账号，（回答‘是’或‘否’）:')if n =='是' :print('两次密码不一致，请重新输入')while True:print('正在为您注册账号···')add = 0s = 1str_add = ''inv_str_add = ''bu = input('请输入您的新用户名：')for i in bu:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a1 = ('{}{}' .format(bu, add + int(inv_str_add)))p = input('请输入您的密码：')i = input('请再次输入您的密码：')if p==i:print('好的，已为您自动登录')e = open('用户名.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e.write(a1)e.write('\n')e.close()add = 0s = 1str_add = ''inv_str_add = ''for i in p:add += ord(i)str_add += str(ord(i))for i in str_add:s += 1for i in range(1, s):inv_str_add += str_add[-i]a = ('{}{}' .format(p, add + int(inv_str_add)))e1 = open('密码.txt','a')#r = '{'+'\''+y+'\''+':'+'\''+p+'\'''}'e1.write(a)e1.write('\n')e1.close()breakbreakprint(1)

运行结果：