Python标准库datetime模块日期和时间数据类型解读

# 导入datetime模块
import datetime
# 创建日期
date = datetime.date(2021, 3, 5)
print(date)
# 获取年
print(date.year)
# 获取月
print(date.month)
# 获取日
print(date.day)

# 创建时间
import datetime
time = datetime.time(13, 14, 20)
print(time)
# 获取小时
print(time.hour)
# 获取分钟
print(time.minute)
# 获取秒
print(time.second)

import datetime
# 创建日期时间
datetime = datetime.datetime(2019, 9, 9, 13, 14, 20)
print(datetime)
# 获取年
print(datetime.year)
# 获取月
print(datetime.month)
# 获取日
print(datetime.day)
# 获取小时
print(datetime.hour)
# 获取分钟
print(datetime.minute)
# 获取秒
print(datetime.second)

import datetime
# 获取当前时间
print(datetime.datetime.now())

2021-03-02 11:18:28.025878

Process finished with exit code 0

import datetime
date_time = datetime.datetime(2021, 3, 5, 13, 14, 20)
print(type(date_time))
print(date_time)
str_date_time = str(date_time)
print(str_date_time)
print(type(str_date_time))

<class 'datetime.datetime'>
2021-03-05 13:14:20
2021-03-05 13:14:20
<class 'str'>

Process finished with exit code 0

import datetime
date_time = datetime.datetime(2021, 3, 5, 13, 14, 20)
str_time = date_time.strftime('%m/%d/%Y %H:%M')

print(str_time)

03/05/2021 13:14

Process finished with exit code 0

import datetime
strp = datetime.datetime.strptime('Aug-23-21 20:13', '%b-%d-%y %H:%M')
print(strp)

2021-08-23 20:13:00

import time
now = datetime.datetime.now()
time_stamp = time.mktime(now.timetuple()) 
print(time_stamp)

>>> 1640851597.0

import time

date_num = 1640851597.0
date_str = time.strftime('%Y-%m-%d %H:%M:%S', time.localtime(date_num)) 

print(date_num)

>>> 2021-12-30 16:06:37

import time
import datetime

date_num = 1640851597.0
dateArray = datetime.datetime.utcfromtimestamp(date_num)

print(dateArray)
print(type(dateArray))

>>> 2021-12-30 08:06:37
>>> <class 'datetime.datetime'>