save project

diy2.py

 i=3
 i=3
 username = "python"
 username = "python"
 userpassword = "123456"
 userpassword = "123456"
-if i>0
-    while True:
+
+while True:
+    if i>0:
         name = input("请输入用户名:")
         name = input("请输入用户名:")
         password = input("请输入密码:")
         password = input("请输入密码:")
         i=i-1
         i=i-1
         if name == username and password == userpassword:
         if name == username and password == userpassword:
             print("登录成功!")
             print("登录成功!")
             break
             break
-        if name != username
+        if name != username:
             print("用户名不存在!请重新输入")
             print("用户名不存在!请重新输入")
-            print("您还有"+i+"次重试机会")
-        if password != userpassword
+            print("您还有"+str(i)+"次重试机会")
+        if password != userpassword:
             print("密码错误，请重新输入")
             print("密码错误，请重新输入")
-            print("您还有"+i+"次重试机会")
+            print("您还有"+str(i)+"次重试机会")
 print("欢迎来到贝尔编程!")
 print("欢迎来到贝尔编程!")