由字符串格式轉(zhuǎn)化為日期格式的函數(shù)為:
datetime.datetime.strptime()
由日期格式轉(zhuǎn)化為字符串格式的函數(shù)為:
datetime.datetime.strftime()
示例：
import datetime
day = datetime.datetime.strptime('2020-2-18 10:54:45', '%Y-%m-%d %H:%M:%S')
print(day)
print type(day)
day = datetime.datetime.strftime(day, '%Y-%m-%d %H:%M:%S')
print(day)
print type(day)
輸出：
root@tao:/var/www/html/python# python 3.py
2020-02-18 10:54:45
<type 'datetime.datetime'>
2020-02-18 10:54:45
<type 'str'>
