import time
import datetime
timestamp = 1570774556514
转换成localtime
time_local = time.localtime(timestamp/1000)
转换成新的时间格式(精确到秒)
dt = time.strftime("%Y-%m-%d %H:%M:%S", time_local)
print(dt) # 2019-10-11 14:15:56
d = datetime.datetime.fromtimestamp(timestamp/1000)
精确到毫秒
str1 = d.strftime("%Y-%m-%d %H:%M:%S.%f")
print(str1) # 2019-10-11 14:15:56.514000
