old_contents: # -*- coding: utf-8 -*-
  
  # Copyright 2013 Tomo Krajina
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  # http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import logging        as mod_logging
  import os             as mod_os
  import urllib         as mod_urllib
  import re             as mod_re
  import pickle         as mod_pickle
  import os.path        as mod_path
  
  import data           as mod_data
  
  def retrieve_all_files_urls(url):
      mod_logging.info('Retrieving {0}'.format(url))
      url_stream = mod_urllib.urlopen(url)
      contents = url_stream.read()
      url_stream.close()
  
      url_candidates = mod_re.findall('href="(.*?)"', contents)
      urls = {}
  
      for url_candidate in url_candidates:
          if url_candidate.endswith('/') and not url_candidate in url:
              files_url = '{0}/{1}'.format(url, url_candidate)
  
              urls.update(get_files(files_url))
  
      return urls
  	
  def get_files(url):
      mod_logging.info('Retrieving {0}'.format(url))
      url_stream = mod_urllib.urlopen(url)
      contents = url_stream.read()
      url_stream.close()
  
      result = {}
  
      url_candidates = mod_re.findall('href="(.*?)"', contents)
      for url_candidate in url_candidates:
          if url_candidate.endswith('.hgt.zip'):
              file_url = '{0}/{1}'.format(url, url_candidate)
              result[url_candidate.replace('.zip', '')] = file_url
  
      mod_logging.info('Found {0} files'.format(len(result)))
  
      return result
  
  if __name__ == '__main__':
      latitude = 45.
      longitude = 45.
  
      print get_geo_elevation_data()
  
  
new_contents: # -*- coding: utf-8 -*-
  
  # Copyright 2013 Tomo Krajina
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  # http://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import logging        as mod_logging
  import os             as mod_os
  import urllib         as mod_urllib
  import re             as mod_re
  import pickle         as mod_pickle
  import os.path        as mod_path
  
  import data           as mod_data
  
  def retrieve_all_files_urls(url):
      mod_logging.info('Retrieving {0}'.format(url))
      url_stream = mod_urllib.urlopen(url)
      contents = url_stream.read()
      url_stream.close()
  
      url_candidates = mod_re.findall('href="(.*?)"', contents)
      urls = {}
  
      for url_candidate in url_candidates:
          if url_candidate.endswith('/') and not url_candidate in url:
              files_url = '{0}/{1}'.format(url, url_candidate)
  
              urls.update(get_files(files_url))
  
      return urls
  	
  def get_files(url):
      mod_logging.info('Retrieving {0}'.format(url))
      url_stream = mod_urllib.urlopen(url)
      contents = url_stream.read()
      url_stream.close()
  
      result = {}
  
      url_candidates = mod_re.findall('href="(.*?)"', contents)
      for url_candidate in url_candidates:
          if url_candidate.endswith('.hgt.zip'):
              file_url = '{0}/{1}'.format(url, url_candidate)
              result[url_candidate.replace('.zip', '')] = file_url
  
      mod_logging.info('Found {0} files'.format(len(result)))
  
      return result
  
  if __name__ == '__main__':
      latitude = 45.
      longitude = 45.
  
      print(get_geo_elevation_data())
  
  
subject: Update retriever.py