我有这段自称的代码:
def get_input():
my_var = input('Enter "a" or "b": ')
if my_var != "a" and my_var != "b":
print('You didn\'t type "a" or "b". Try again.')
get_input()
else:
return my_var
print('got input:', get_input())
现在,如果我输入"a"或"b",一切都很好.输出是:
Type "a" or "b": a
got input: a
但是,如果我输入其他内容然后输入"a"或"b",我会得到:
Type "a" or "b": purple
You didn't type "a" or "b". Try again.
Type "a" or "b": a
got input: None
我不知道为什么get_input()要回来None,因为它应该只返回my_var.print语句显示None正确的值,但函数由于某种原因不返回该值.