Simple Python script to download current maps for my Garmin

downloadGarmin.py

#!/usr/bin/env python3
# -*- coding: utf-8 -*-
# Python script for downloading the current GARMIN maps


import os
import requests
import random
import string



def createTempFile(chars=8) :
	'''
	Create and open a temp file
	'''
	while True :
		ret = ""
		for i in range(chars) : ret += random.choice(string.ascii_letters)
		if not os.path.isfile(ret) : return ret
	

def download(url, filename) :
	req = requests.get(url, stream=True)
	downFile = createTempFile()
	print("Downloading '" + url + "' to " + downFile + " ... ")
	try :
		with open(downFile, 'wb') as fd :
			for chunk in req.iter_content(100000):
				fd.write(chunk)
			fd.close()
		if os.path.isfile(filename) : os.remove(filename)
		os.rename(downFile, filename)
	finally :
		if os.path.isfile(downFile) : os.remove(downFile)
	
	

if __name__ == "__main__" : 
	# Main program part.
	# Add maps here, if you need them to be downloaded
	download('http://garmin.opentopomap.org/data/austria/austria_garmin.zip', 'austria_garmin.zip')
	download('http://garmin.opentopomap.org/data/alps/alps_garmin.zip', 'alps_garmin.zip')
	download('http://garmin.opentopomap.org/data/italy/italy_garmin.zip', 'italy_garmin.zip')
	download('http://garmin.opentopomap.org/data/germany/germany_garmin.zip', 'germany_garmin.zip')
	download('http://garmin.opentopomap.org/data/netherlands/netherlands_garmin.zip', 'netherlands_garmin.zip')