字符串--时间元祖---时间戳转换

import datetime,os
import time
time_str = time.strftime('%Y-%m-%d')    #时间字符串
print(time_str)
time_tuple = time.strptime(time_str,'%Y-%m-%d')
print(time_tuple)
cur_mk = time.mktime(time_tuple)
print(cur_mk)