save project

diy2.py

 username = "zsw"
 username = "zsw"
 userpassword = "123456"
 userpassword = "123456"
+i=3
 while True:
 while True:
-    a = input("请输入用户名:")
-    b = input("请输入密码:")
-    if a == username and b == userpassword:
-        print("登录成功!")
-        break
-    if username!=a:  
-        print("用户名错误!请重新输入")
-        continue
-    if userpassword!=b:
-        print("密码错误!请重新输入")
+    if i>0:
+        a = input("请输入用户名:")
+        b = input("请输入密码:")
+        i=i-1
+        if a == username and b == userpassword:
+            print("登录成功!")
+            break
+        if username!=a:  
+            print("用户名错误!请重新输入")
+            print("你还剩"+str(i)+"次机会")
+            continue
+        if userpassword!=b:
+            print("密码错误!请重新输入")
+            print("你还剩"+str(i)+"次机会")
+    else:
+        print("账号锁定")
+        exit()
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")
\ No newline at end of file