python3 时间转换

time函数

time.time() 

获取当前时间戳   浮点型

#获取当前时间戳 （浮点型）
t = time.time()
print(t)
#1551770368.3962758

time.strftime("%Y-%m-%d %H:%M:%S")   

按指定格式输出当前时间字符串

# 按指定格式输出当前时间字符串
t = time.strftime("%Y-%m-%d %H:%M:%S")
print(t)
#2019-03-05 15:19:28

time.strptime()

将时间字符串  转换为 时间数组

# 把时间格式的字符串转换成 time.struct_time时间
tt = "2019-03-05 15:19:28"
t = time.strptime(tt, "%Y-%m-%d %H:%M:%S")
print(type(t.tm_hour),t.tm_hour)
print("time.strptime(tt, '%Y-%m-%d %H:%M:%S'):", t, type(t))

#    <class 'int'> 15
#    time.strptime(tt, '%Y-%m-%d %H:%M:%S'): time.struct_time(tm_year=2019, tm_mon=3, tm_mday=5, tm_hour=15, tm_min=19, tm_sec=28, tm_wday=1, tm_yday=64, tm_isdst=-1) <class 'time.struct_time'>

time.mktime(变量，时间格式)   

将时间数组  转换成  时间戳

tt = "2019-03-05 15:19:28"
t = time.strptime(tt, "%Y-%m-%d %H:%M:%S")
# 将时间数组 转换 时间戳  （浮点类）
c = time.mktime(t)
print(type(c), c)
#    <class 'float'> 1551770368.0

 

datetime

datetime.now()

from datetime import datetime, time

tt = datetime.now()
print(type(tt), tt)

#<class 'datetime.datetime'> 2019-03-05 16:24:49.866959

datetime.strftime(tt, "%Y-%m-%d %H:%M:%S")

将时间 转换成  时间字符串

from datetime import datetime

tt = datetime.now()
th = datetime.strftime(tt, "%Y-%m-%d %H:%M:%S")
print(type(th), th)

#<class 'str'> 2019-03-05 16:27:45

datetime.strptime(tt, "%Y-%m-%d %H:%M:%S")

将时间字符串 转换 时间  （class 'datetime.datetime'）

from datetime import datetime
tt = "2019-03-05 15:19:28"

datetimeArray = datetime.strptime(tt, "%Y-%m-%d %H:%M:%S")
print(type(datetimeArray), datetimeArray)

#<class 'datetime.datetime'> 2019-03-05 15:19:28

datetime类型.timetuple()

将  时间 类型  转换成  时间元祖

from datetime import datetime, time

tt = "2019-03-05 16:27:45"
th = datetime.strptime(tt, "%Y-%m-%d %H:%M:%S")
ty = th.timetuple()
print(type(ty), ty)

# <class 'time.struct_time'> time.struct_time(tm_year=2019, tm_mon=3, tm_mday=5, tm_hour=16, tm_min=27, tm_sec=45, tm_wday=1, tm_yday=64, tm_isdst=-1)

参考：https://www.cnblogs.com/zhangxinqi/p/7687862.html

https://blog.csdn.net/brucewong0516/article/details/79044905