title: Using Location-bias in Google Maps API to find all shops in a square
body: <p>I have just recently started to work with the Google maps API and encountered a problem I cannot seem to solve. </p>
  
  <p>I want to find all shops within a certain area using the Google Maps API with <em>find_place</em> and <em>location_bias</em>. My code works if I use places.nearby and a radius. However, if I instead specify the area with a rectangle, as below, it doesn't work:</p>
  
  <pre><code>gmaps = googlemaps.Client(key = API_Key)
  
  results = gmaps.find_place('-34.627041, -58.479310', input_type= 'textquery', location_bias= ("rectangle" ['-34.627041, -58.479310'|'-34.625743, -58.478704']))
  </code></pre>
  
  <p>The error message: </p>
  
  <blockquote>
    <p>TypeError: unsupported operand type(s) for |: 'str' and 'str'</p>
  </blockquote>
  
  <p>Do you have an idea what to do?</p>