相关疑难解决方法(0)

好的,所以我在python中编写成绩检查代码,我的代码是:

unit3Done = str(input("Have you done your Unit 3 Controlled Assessment? (Type y or n): ")).lower()
if unit3Done == "y":
    pass
elif unit3Done == "n":
    print "Sorry. You must have done at least one unit to calculate what you need for an A*"
else:
    print "Sorry. That's not a valid answer."

当我通过我的python编译器运行它并且我选择时"n",我得到一个错误说:

"NameError:名称'n'未定义"

当我选择"y"我再NameError有'y'是问题,但是当我做别的事情,代码运行正常.

任何帮助是极大的赞赏,

谢谢.