save project

diy2.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
+i=3
 while True:
 while True:
-    name = input("请输入用户名:")
-    password = input("请输入密码:")
-    if name == username and password == userpassword:
-        break
-        print("登录成功!")
-    print("用户名和密码错误!请重新输入")
+    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("登录成功!")
+            break
+        print("用户名和密码错误!请重新输入")
+        if name!=username:
+            continue
+        print("请重新输入名字")
+        if password!=userpassword:
+            continue
+    else:
+        if i<=0:
+            exit()
+    print("请重新输入密码")
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
-if name!=username:
-    print("请重新输入名字")
-if password!=userpassword:
-    print("请重新输入密码")
\ No newline at end of file