save project

diy2.py

+i=4
+username = "a"
+userpassword = "123456"
+while True:
+    if i >= 0:
+        name = input("\n请输入用户账号_")
+        password = input("请输入账号密码_")
+        if name == username and password == userpassword:
+            print("\n登录成功!")
+            break
+        if name!=username:
+            print("\n用户账号错误,请重新输入")
+            continue
+        if password!=userpassword:
+            if i == 1:
+                print("\n账号密码错误，请重新输入\n您还有最后一次机会，失败后将会封锁") 
+                i-=1
+                continue
+            elif i>0:
+                print("\n账号密码错误,请重新输入")
+                print("密码输入次数还剩 "+str(i)+" 次")
+            i-=1    
+    else:
+        print("\n您的账号已被封锁，请拿身份证到我公司解锁")
+        exit()
+print("欢迎来到贝尔编程!")
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