datetime64[ns]转化为datetime

#dtype: datetime64[ns]转化为datetime
unix_epoch = np.datetime64(0, 's')
one_second = np.timedelta64(1, 's')
seconds_since_epoch = (t3a2 - unix_epoch) / one_second
seconds_since_epoch
t3a3=datetime.datetime.utcfromtimestamp(seconds_since_epoch)

以下差8小时

# print("将军的春天t3a2",t3a2,'dhakjhdkjafhka',t3a3,type(t3a3))#dtype: datetime64[ns]转化为datetime
#以下方式差8个小时，不知道原因
# #先转化为timestamp：
# # t3a1=(t3a-np.datetime64('1970-01-01T00:00:00Z')) / np.timedelta64(1, 's')
# # 再将timestamp转为datetime格式
# t3a=datetime.datetime.fromtimestamp((t3a2- np.datetime64('1970-01-01T00:00:00Z','s')) / np.timedelta64(1, 's'))
# # print("将军的春天是李长歌t3a",t3a,type(t3a))