Python内置模块：datetime

>>> import datetime
>>> type(datetime)
<class 'module'>
>>> datetime.__file__
'C:\\Python38\\lib\\datetime.py'
>>> dir(datetime)
['MAXYEAR', 'MINYEAR', '__builtins__', '__cached__', '__doc__', '__file__', '__loader__', '__name__', '__package__', '__spec__', 'date', 'datetime', 'datetime_CAPI', 'sys', 'time', 'timedelta', 'timezone', 'tzinfo']
>>>
>>> datetime.datetime(2020, 8, 18, 18, 48)
datetime.datetime(2020, 8, 18, 18, 48)