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update to new streamed-graph api
author drewp@bigasterisk.com
date Sun, 07 May 2023 16:02:03 -0700
parents 3c1bc3bc5a6c
children
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1 from datetime import time, timedelta, datetime
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2 from dateutil.tz import tzlocal, tzutc
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3
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4 """
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5 data from http://aa.usno.navy.mil/data/docs/RS_OneYear.php (2013, san francisco)
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6 which I found via http://www.perceptiveautomation.com/userforum/viewtopic.php?t=8627&p=54621
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7 """
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8 _src = """
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9 Jan. Feb. Mar. Apr. May June July Aug. Sept. Oct. Nov. Dec.
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10 Day Begin End Begin End Begin End Begin End Begin End Begin End Begin End Begin End Begin End Begin End Begin End Begin End
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43 """
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44
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45 _data = {} # mm-dd : (morningtime, eveningtime)
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46 for row in _src.splitlines()[4:]:
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47 words = row.split()
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48 day = words[0]
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49 for month, t1, t2 in zip(range(1,13), words[1::2], words[2::2]):
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50 if t1 == 'x':
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51 continue
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52 _data["%02d-%s" % (month, day)] = time(int(t1[:2]), int(t1[2:])), time(int(t2[:2]), int(t2[2:]))
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53
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54 def isWithinTwilight(t):
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55 """is the datetime within the civil twilight for san francisco"""
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56 standardTime = t.astimezone(tzutc()) + timedelta(seconds=-8 * 3600)
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57 t1, t2 = _data["%02d-%02d" % (standardTime.month, standardTime.day)]
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58 return not (t1 < standardTime.time() < t2)
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59
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60 if __name__ == '__main__':
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61 print(isWithinTwilight(datetime.now(tzlocal())))