问将datetime对象转换为字符串

EN

import datetime

datetime.datetime.now().strftime('%Y-%m-%d %H:%M:%S.%f')

>>> '2022-07-28 10:27:34.986848'

np.array(datetime.datetime.now(), dtype='datetime64[s]')

>>> array('2022-07-28T10:32:19', dtype='datetime64[s]')

import datetime

yourdt = yourdt.astype(datetime.datetime)
yourdt_str = yourdt.strftime("%Y-%m-%d %H:%M:%S")

from datetime import datetime

now = datetime.now() # current date and time

year = now.strftime("%Y")
print("year:", year)

month = now.strftime("%m")
print("month:", month)

day = now.strftime("%d")
print("day:", day)

time = now.strftime("%H:%M:%S")
print("time:", time)

date_time = now.strftime("%m/%d/%Y, %H:%M:%S")
print("date and time:",date_time)