Basic distinction time, date, datetime, timedelta like datetime module

datetime in the project using:

datetime is a library on time, consisting essentially of:

• date date object, commonly used attributes are year, month, day

• time-time objects, hour, minute, second, millisecond

• datetime datetime objects, commonly used attributes hour, minute, second, microsecond

• timedelta time interval, the length of time between the two points

date：

import datetime
date = datetime.date(2020,3,24)
print(date)
print(type(date))
-----------------
2020-03-24
<class 'datetime.date'>

time：

import datetime
time_1 = datetime.time()
time_2 = datetime.time(7,33,44)
time_3 = datetime.time(7,33,44,1020)
print(time_1)
print(time_2)
print(time_3)
print(type(time_1))
-------------------------------------
00:00:00
07:33:44
07:33:44.001020
<class 'datetime.time'>

Datetime:

import datetime
datetime = datetime.datetime(2020,2,2,18,33,44)
print(datetime)
------------------------------------------------
2020-02-02 18:33:44
<class 'datetime.datetime'>

hour delta:

import datetime
from datetime import timedelta
dlt = timedelta(seconds=30)
print(dlt)
print(type(dlt))
-------------------------------------------
0:00:30
<class 'datetime.timedelta'>