# 时间字符串转时间结构体
>>> time.strptime(format_time,'%Y.%m.%d %H:%M:%S')
time.struct_time(tm_year=2020, tm_mon=5, tm_mday=7, tm_hour=21, tm_min=29, tm_sec=16, tm_wday=3, tm_yday=128, tm_isdst=-1)