Short script to convert gmap pedometer URLs into GPX files

gmapped2gpx.py

import sys
import urllib.parse
import urllib.request

import numpy as np

in_url = sys.argv[1]

q = urllib.parse.urlparse(in_url).query
d = urllib.parse.parse_qs(q)
route_id = int(d['r'][0])

if route_id < 5000000:
    url = 'https://www.gmap-pedometer.com/getRoute.php'
else:
    url = 'https://www.gmap-pedometer.com/gp/ajaxRoute/get'

data = urllib.parse.urlencode({'rId': route_id}).encode()
req = urllib.request.Request(url, data=data)
resp = urllib.request.urlopen(req).read()

d = urllib.parse.parse_qs(resp)
a = np.array([float(x) for x in d[b'polyline'][0].split(b'a')]).reshape(-1, 2)

print("<gpx>", end='')
print("<trk>", end='')
print("<name>{}</name>".format(in_url), end='')
print("<trkseg>", end='')
for lat, lon in a:
    print('<trkpt lat="{}" lon="{}" />'.format(lat, lon), end='')
print("</trkseg>", end='')
print("</trk>", end='')
print("</gpx>")