save project

while.py

+i=5
+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("登录成功")
+            break
+        if name!=username:
+            print("用户名错误")
+            print("还剩"+str(i)+"机会")
+            continue
+        if password!=userpassword:
+            print("密码错误")
+            print("还剩"+str(i)+"机会")
+    else:
+        print("密码锁定")
+        exit()
+print("欢迎进入")
\ No newline at end of file