时间模块(import time)

Posted 2020-12-28 wangjian941118

时间戳时间: fliat数据类型,给机器用的　

print(time.time()) =>1533713657.5423343

结构化时间: 上下两种格式的中间状态 能够通过属性名来获取对象中的值

time_obj = time.localtime() 

print(time_obj) =>time.struct_time(tm_year=2018, tm_mon=8, tm_mday=8, tm_hour=15, tm_min=35, tm_sec=23, tm_wday=2, tm_yday=220, tm_isdst=0)

print(time_obj.tm_year) =>2018

print(time_obj.tm_mday) => 8

localtime() 默认是当前时间戳 可以手动给值
例:
print(time.localtime(1500000000))
=>time.struct_time(tm_year=2017, tm_mon=7, tm_mday=14, tm_hour=10, tm_min=40, tm_sec=0, tm_wday=4, tm_yday=195, tm_isdst=0

格式化时间: 字符串时间,str数据类型 可以根据需要来显示时间

print(time.strftime(‘%Y-%m-%d))      # strftime = str format time
=>2018-08-08

print(time.strftime(‘%Y-%m-%d %A %H:%M:%S‘))
=>2018-08-08 Wednesday 15:39:43

print(time.strftime(‘%y-%m-%d %A %H:%M:%S‘))
=>18-08-08 Wednesday 15:40:33

print(time.strftime(‘%y/%m/%d %H:%M:%S‘))
=>18/08/08 15:41:14

print(time.strftime(‘%c‘))
=>Wed Aug  8 15:41:35 2018

例:计算本月一号的时间戳时间

#结构化时间
struct_time = time.localtime()
struct_time = time.strptime(‘%s-%s-1‘%(struct_time.tm_year,struct_time.tm_mon),‘%Y-%m-%d‘)
print(time.mktime(struct_time))


#格式化时间
ret = time.strftime(‘%Y-%m-1‘)
struct_time = time.strptime(ret,‘%Y-%m-%d‘)
print(time.mktime(struct_time))