FindNearLocation.py

from __future__ import print_function
import sys
import math
import time


db = []

with open("./lonlat", 'rb') as fi:
	for l in fi:
		p = l.split()
		db.append((float(p[0]), float(p[1]), p[2]))

"""
Hermosillo
latitude = float("29.100045")
longitude = float("-111.007476")
"""

#Monterrey
latitude = float("25.666667")
longitude = float("-100.316667")

if len(sys.argv) >= 3:
	latitude = float(sys.argv[1])
	longitude = float(sys.argv[2])

def determine_timezone(latitude, longitude):
	mindistance = 999999
	timezone = 'no se'

	for loc in db:
		lat, lon, name = loc
		latdif = abs(lat - latitude)
		londif = abs(lon - longitude)
		rawdif = math.sqrt(pow(latdif, 2) + pow(londif, 2))
		if rawdif < mindistance:
			mindistance = rawdif
			timezone = name
			lastrawdif = rawdif

	return (timezone, lastrawdif)
	
if len(sys.argv) >= 4:
	n = int(sys.argv[3])
else:
	n = 1

print_stuff = '--print' in sys.argv

ftime = time.time()

for i in range(n):
	tz, dif = determine_timezone(latitude, longitude)
	if print_stuff:
		print("Discrepancia: %.15f" % dif)
		print("Zona horaria: %s" % tz)

ltime = time.time() - ftime
print("Tiempo: %.3f" % ltime)