如何把字符串转化成时间

import datetimedateTime_p = datetime.datetime.now()  date_p = dateTime_p.date() print(dateTime_p) #2019-01-30 15:17:46.573139print(date_p) #2019-01-30

#!/usr/bin/env python3import datetimedate_p = datetime.datetime.now().date()str_p = str(date_p)print(date_p,type(date_p)) #2019-01-30 <class>print(str_p,type(str_p)) #2019-01-30 <class></class></class>

import datetimestr_p = '2019-01-30 15:29:08'dateTime_p = datetime.datetime.strptime(str_p,'%Y-%m-%d %H:%M:%S')print(dateTime_p) # 2019-01-30 15:29:08

import datetimedateTime_p = datetime.datetime.now()str_p = datetime.datetime.strftime(dateTime_p,'%Y-%m-%d')print(dateTime_p) # 2019-01-30 15:36:19.415157

#!/usr/bin/env python3import datetimestr_p = '2019-01-30'date_p = datetime.datetime.strptime(str_p,'%Y-%m-%d').date()print(date_p,type(date_p)) # 2019-01-30 <class></class>

#!/usr/bin/env python3import datetime# today = datetime.datetime.today()today = datetime.datetime.today().date()yestoday = today + datetime.timedelta(days=-1)tomorrow = today + datetime.timedelta(days=1)print(today) # 2019-01-30print(yestoday)# 2019-01-29print(tomorrow)# 2019-01-31