1.简介

在编写代码时，往往涉及时间、日期、时间戳的相互转换。

2.示例

# 引入模块

import time, datetime

from sqlalchemy_utils.types.arrow import arrow

2.1 str类型的日期转换为时间戳

# 字符类型的时 tss1 = '2013-10-10 23:40:00'

# 转为时间数组timeArray = time.strptime(tss1, "%Y-%m-%d %H:%M:%S")

print timeArray

# timeArray可以调用tm_year等

print timeArray.tm_year # 2013

# 转为时间戳

timeStamp = int(time.mktime(timeArray))

print timeStamp # 1381419600

# 结果如下

time.struct_time(tm_year=2013, tm_mon=10, tm_mday=10, tm_hour=23, tm_min=40, tm_sec=0, tm_wday=3, tm_yday=283, tm_isdst=-1)

2013

1381419600

2.2 更改str类型日期的显示格式

tss2 = "2013-10-10 23:40:00"

# 转为数组

timeArray = time.strptime(tss2, "%Y-%m-%d %H:%M:%S")

# 转为其它显示格式

otherStyleTime = time.strftime("%Y/%m/%d %H:%M:%S", timeArray)

print otherStyleTime # 2013/10/10 23:40:00

tss3 = "2013/10/10 23:40:00"

timeArray = time.strptime(tss3, "%Y/%m/%d %H:%M:%S")

otherStyleTime = time.strftime("%Y-%m-%d %H:%M:%S", timeArray)

print otherStyleTime # 2013-10-10 23:40:00

2.3 时间戳转换为指定格式的日期

# 使用time

timeStamp = 1381419600

timeArray = time.localtime(timeStamp)

otherStyleTime = time.strftime("%Y--%m--%d %H:%M:%S", timeArray)

print(otherStyleTime) # 2013--10--10 23:40:00

# 使用datetime

timeStamp = 1381419600

dateArray = datetime.datetime.fromtimestamp(timeStamp)

otherStyleTime = dateArray.strftime("%Y--%m--%d %H:%M:%S")

print(otherStyleTime) # 2013--10--10 23:40:00

# 使用datetime，指定utc时间，相差8小时

timeStamp = 1381419600

dateArray = datetime.datetime.utcfromtimestamp(timeStamp)

otherStyleTime = dateArray.strftime("%Y--%m--%d %H:%M:%S")

print(otherStyleTime) # 2013--10--10 15:40:00

2.4 获取当前时间并且用指定格式显示

# time获取当前时间戳

now = int(time.time()) # 1533952277

timeArray = time.localtime(now)

print timeArray

otherStyleTime = time.strftime("%Y--%m--%d %H:%M:%S", timeArray)

print otherStyleTime

# 结果如下

time.struct_time(tm_year=2018, tm_mon=8, tm_mday=11, tm_hour=9, tm_min=51, tm_sec=17,

tm_wday=5, tm_yday=223, tm_isdst=0)

2018--08--11 09:51:17

# datetime获取当前时间，数组格式

now = datetime.datetime.now()

print now

otherStyleTime = now.strftime("%Y--%m--%d %H:%M:%S")

print otherStyleTime

# 结果如下：

2018-08-11 09:51:17.362986

2018--08--11 09:51:17

2.5 使用arrow转换时间

logging.warning(arrow.get(1593515266000 / 1000).format("YYYY-MM-DD HH:mm:ss"))

# 相差8小时

logging.warning(arrow.get(1593515266000 / 1000).to("local").format("YYYY-MM-DD HH:mm:ss"))

# 结果如下：

WARNING:root:2020-06-30 11:07:46

WARNING:root:2020-06-30 19:07:46