title: How get latitude and longitude through address without too many requests error in python
body: <p>I have a database contains 5000 building approx, I want to locate them through its address, so I use GeoPy like this:</p>
  
  <pre><code>def getLalo(address):
      geolocator = Nominatim()
      location = geolocator.geocode(address)
      if location == None:
          return [0,0]
      return [location.latitude,location.longitude]
  
  bmk['latitude'], bmk['longitude']= bmk.apply(lambda row: getLalo(row['full_address']), axis=1)
  </code></pre>
  
  <p>However, seems like I got <code>GeocoderServiceError: HTTP Error 429: Too Many Requests</code></p>
  
  <p>How do I avoid this? thx!</p>