我在下面具有此功能;
def time_in_range(start, end, x):
"""Return true if x is in the range [start, end]"""
if start <= end:
return start <= x <= end
else:
return start <= x or x <= end
函数参数均为日期时间类型。我想向函数添加键入提示。这就是我所做的;
def time_in_range(start: datetime, end: datetime, x: datetime) -> bool:
"""Return true if x is in the range [start, end]"""
if start <= end:
return start <= x <= end
else:
return start <= x or x <= end
我收到错误NameError: name 'datetime' is not defined
。为该功能添加类型的正确方法是什么?
我正在使用python v3.7
答案 0 :(得分:3)
您需要导入datetime
。
>>> def f(x: datetime):
... pass
...
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
NameError: name 'datetime' is not defined
>>> from datetime import datetime
>>> def f(x: datetime):
... pass
...
>>>
Python 3.7.4
答案 1 :(得分:3)
import datetime
并使用datetime.datetime
作为提示,或者from datetime import datetime
并使用datetime
作为提示。