save project

diy1.py

 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
+i=3
 while True:
 while True:
-    yourname=input("输入")
-    yourpassword=input("输入密码")
-    if username==yourname and userpassword==yourpassword:
-        print("登录成功") 
-    break
-    if username!=yourname:
-        print("用户名错误！！！！！")
-        continue
-    if userpassword!=yourpassword:
-        print("密码！！！！！")
+    if i>0:
+        yourname=input("输入")
+        yourpassword=input("输入密码")
+        i-=1
+        if username==yourname and userpassword==yourpassword:
+            print("登录成功") 
+            break
+        if username!=yourname:
+            print("用户名错误！！！！！")
+            print("您还有"+str(i)+"次机会")
+            continue
+        if userpassword!=yourpassword:
+            print("密码！！！！！")
+            print("您还有"+str(i)+"次机会")
+    else:
+        print("封号！！！！！！！！！！")
+        exit()
 print("欢迎")
 print("欢迎")
 
 
 
 
+