save project

1.py

+print("hello world!")
\ No newline at end of file

a.py

+name = "aaa"
+i =3
+while True:
+    if i>=0:
+        
+        username = input("输入用户名：")
+        userpassword = input("输入密码：")
+        i=i-1
+        if username == name and userpassword == password:
+            print('登录成功')
+            break
+        
+        if name!=username:
+            print("用户名错误")
+            continue
+        if name!=userpassword:
+            print("密码错误")   
+print("欢迎来到python世界")    
+