This issue was raised because I ask in a post if Weewx can return true if
it is day, or false if it is night. I was tempted by Mr. Tom Keffer to
write a script named daylight.py because he told me this is done
voluntarily and suggested I do it, so I did.
The script ( attachment daylight.py ) is in 3 phases.
1) Parse sunrise and sunset time from Weewx and check if the content is a
time format in this form,
for example:
00:00
12:00am 12:00AM
12:00 am 12:00 AM
12:00pm 12:00PM
12:00 pm 12:00 PM
If nothing applies from the above return N/A.
2)If the time is in 12hr mode convert it to 24hr.
3)Check if it is night or day using sunrise, sunset and current time.
The problem is that I'm not familiar with weewx development, how will I
incorporate and register this script to Weewx so by importing sunrise and
sunset time and giving $current.isDaylight tag, return true or false.
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#!/usr/bin/env python
#
# This script was developed by Antonis Katsonis
#
"""Returns true if it is day, or false if it is night"""
import time
import re
sunriseTime = '--:--' # weewx sunrise
sunsetTime = '--:--' # weewx sunset
def convertTime(timeIn):
if not timeIn.replace(':', '').isdigit():
hour = timeIn.split(':')[0]
minute = timeIn.split(':')[1].replace(' ', '').replace('AM', '').replace('PM', '')
ampm = re.search('AM$|PM$', timeIn).group()
if hour == 12 and ampm == 'AM':
return '00:' + minute
elif hour == 12 and ampm == 'PM':
return '12:' + minute
elif ampm == 'PM':
return str(int(hour) + 12) + minute
else:
return timeIn
else:
return timeIn
def isDayTime(sunrise, sunset):
sunrise = convertTime(sunrise.upper())
sunset = convertTime(sunset.upper())
currentTime = time.strftime("%H%M")
sunrise = sunrise.replace(':', '')
sunset = sunset.replace(':', '')
if sunrise == sunset or sunrise > sunset:
return 'N/A'
elif currentTime >= sunrise and currentTime < sunset:
return 'true'
else:
return 'false'
try:
if time.strptime(sunriseTime, '%H:%M') and time.strptime(sunsetTime, '%H:%M'):
format1 = True
except:
format1 = False
try:
if time.strptime(sunriseTime, '%I:%M%p') and time.strptime(sunsetTime, '%I:%M%p'):
format2 = True
except:
format2 = False
try:
if time.strptime(sunriseTime, '%I:%M %p') and time.strptime(sunsetTime, '%I:%M %p'):
format3 = True
except:
format3 = False
if format1 or format2 or format3:
print isDayTime(sunriseTime, sunsetTime)
else:
print 'N/A'
