save project

diy2.py

+i=3
+username = 'python'   
+userpassword = "123456" 
+while True:  
+    if i>0:
+        username2=input("请输入账号")
+        userpassword2=input("请输入密码") 
+        i-=1 
+        if username==username2 and userpassword==userpassword2:
+            print("登陆成功")
+            break  
+        if username2!=username:
+            print("用户错误") 
+            continue
+        if userpassword2!=userpassword:
+            print("账号密码错误")
+    else:
+        print("宁的账户已被锁定，来我司解锁")
+        exit()
+print("欢迎来到贝尔编程")

diy3.py

+i=3
+username = 'python'   
+userpassword = "123456" 
+while True:  
+    if i>0:
+        username2=input("请输入账号")
+        userpassword2=input("请输入密码") 
+        i-=1 
+        if username==username2 and userpassword==userpassword2:
+            print("登陆成功")
+            break  
+        if username2!=username:
+            print("用户错误") 
+            continue
+        if userpassword2!=userpassword:
+            print("账号密码错误")
+    else:
+        print("宁的账户已被锁定，来我司解锁")
+        exit()
+print("欢迎来到贝尔编程")
+

diy4.py

+username = 'python' 
+userpassword = "123456" 
+while True :  
+    username2=input("请输入账号")
+    userpassword2=input("请输入密码")  
+    if username==username2 and userpassword==userpassword2:
+        print("登陆成功")
+        break  
+    if username2!=username:
+        print("用户错误") 
+        continue
+    if userpassword2!=userpassword:
+        print("账号密码错误")
+print("欢迎来到贝尔编程")

diy5.py

+i = 3
+username = "python"
+userpassword = "123456"
+while True:
+    if i>0:
+        name = input("请输入用户名：")
+        password = input("请输入密码:")
+        i-=1
+        if name ==username and password ==userpassword:
+            print("登陆成功")
+            break
+        if name != username:
+            print("用户名错误，请重新输入！")
+            print("温馨提示：您还有"+str(i)+"次登陆机会")
+            continue
+        if  password != userpassword:
+            print("密码输入有误，请重新输入")
+            print("温馨提示：您还有"+str(i)+"次登陆机会")
+    else:
+        print("您的账户崩了，请来我司抢回来")
+        exit()
+print("欢迎来到贝尔编程")
\ No newline at end of file

ssssss.py

+i=3
+username = 'python'   
+userpassword = "123456" 
+while True:  
+    if i>0:
+        username2=input("请输入账号")
+        userpassword2=input("请输入密码") 
+        i-=1 
+        if username==username2 and userpassword==userpassword2:
+            print("登陆成功")
+            break  
+        if username2!=username:
+            print("用户错误") 
+            continue
+        if userpassword2!=userpassword:
+            print("账号密码错误")
+    else:
+        print("宁的账户已被锁定，来我司解锁")
+        exit()
+print("欢迎来到贝尔编程")