日期和时间python 3空闲

Question

你们对此有什么解决方案吗？

from datetime import datetime
a = datetime(2012,9,23)
print(a + timedelta(days = 10))

它出现了日期时间未定义

   a = datetime(2012,9,23)
   NameError: name 'datetime' is not defined

Answer 1

您只导入了datetime但未导入timedelta，因此您可以导入模块并引用其中的类

>>> import datetime
>>> a = datetime.datetime(2012,9,23)
>>> print(a + datetime.timedelta(days = 10))
2012-10-03 00:00:00

或者导入要明确使用的两个类

>>> from datetime import datetime, timedelta
>>> a = datetime(2012,9,23)
>>> print(a + timedelta(days = 10))
2012-10-03 00:00:00

Answer 2

您还需要导入timedelta才能执行此任务。

from datetime import datetime, timedelta

a = datetime(2012,9,23)
print(a + timedelta(days = 10))

Answer 3

您忘记导入timedelta，以下代码应该有效。

from datetime import datetime, timedelta
a = datetime(2012, 9, 23)
print(a + timedelta(days=10))