save project

diy2.py

+b=6
+username = "20170904"
+userpassword = "19481201"
+while True:
+    if  b>0:
+        name = input("给我输入用户名:")
+        password = input("给我输入密码:")
+        b=b-1
+        if name == username and password == userpassword:
+            print("登录成功!")
+
+            break   
+        if name!=username:
+            print("用户名错误!给我重新输入")
+            print("你还有"+str(i)"次机会")
+            
+        else:
+            if password != userpassword:
+                print("密码错误!给我重新输入")
+                print("你还有"+str(i)"次机会")
+    else:
+        print("**账号去世，请换一个")
+        exit()
+print("欢迎来到贝尔编程!")
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