本地时间实际上没有给出本地时间 [英] localtime not actually giving localtime
问题描述
显然有一个与该问题结合使用的时间模块,但我尚未找到它. 我只是试图在Raspberry Pi上使用Pyephem,以查找日出和日落的时间是我的经度坐标. 代码很简单:
there's obviously a time module that works in combination with this problem, but I have not found it yet. I'm simply trying to use Pyephem on a Raspberry Pi to find out what time sunrise and sunset is for my latitude longitude coordinates. the code is quite simply this:
import ephem
import datetime
import time
now = datetime.datetime.now()
gmNow = time.mktime(time.localtime())
Vancouver = ephem.Observer()
Vancouver.lat = 49.2878
Vancouver.horizon = 0
Vancouver.lon = -123.0502
Vancouver.elevation = 80
Vancouver.date = now
# Vancouver.date = time.localtime()
sun = ephem.Sun()
print("sunrise is at",ephem.localtime(Vancouver.next_rising(sun)))
print("sunset is going to be at ",ephem.localtime(Vancouver.next_setting(sun)))
print("now is ",now)
print("gmNow is",gmNow)
什么出口,但运行8小时仍是错误的.所以看来 ephem.localtime()实际上没有运行.
what exports, when that runs is wrong by 8 hours though. so it appears that the ephem.localtime() is not actually running.
pi@raspberrypi ~ $ sudo python3 vivarium_sun.py
sunrise is at 2014-09-19 12:55:56.000004
sunset is going to be at 2014-09-19 00:52:30.000004
now is 2014-09-19 06:22:24.014859
gmNow is 1411132944.0
这真让我发疯,一旦弄清楚,这显然就是那些简单的事情之一,所以我在这里要振作起来.
It's driving me nuts, and it's obviously one of those simple things once it's figured out, so I'm going to the hive mind here.
编辑**仅在Raspberry Pi的命令行中输入'date'即可返回以下内容:
EDIT** Just typing 'date' into the command line of the Raspberry Pi returns the following:
pi@raspberrypi ~ $ date
Fri Sep 19 18:41:42 PDT 2014
这是准确的.
推荐答案
您应该将datetime.utcnow()
传递给观察者,而不是您的本地时间.
You should pass datetime.utcnow()
to the observer instead of your local time.
ephem
如果以浮点形式传递,则期望以弧度表示的latitude
和longitude
,请改用字符串:
ephem
expects latitude
and longitude
in radians if passed as floats, use strings instead:
from datetime import datetime, timezone
import ephem
now = datetime.now(timezone.utc)
Vancouver = ephem.Observer()
Vancouver.lat = '49.2878'
Vancouver.horizon = 0
Vancouver.lon = '-123.0502'
Vancouver.elevation = 80
Vancouver.date = now
sun = ephem.Sun(Vancouver)
print("sunrise is at", ephem.localtime(Vancouver.next_rising(sun)))
print("sunset is going to be at ",
ephem.localtime(Vancouver.next_setting(sun)))
print("now is ",now.astimezone())
输出
sunrise is at 2014-09-20 06:55:38.000005
sunset is going to be at 2014-09-19 19:16:38.000004
now is 2014-09-19 19:15:04.171486-07:00
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