title: Python azure uploaded file content type changed to application/octet-stream
body: <p>I am using python <a href="https://github.com/Azure/azure-sdk-for-python" rel="nofollow noreferrer">Azure</a> sdk. When the file uploaded its content type changed to application/octet-stream. </p>
  
  <p>I want to set its default content type like <strong>image/png</strong> for PNG image.</p>
  
  <p>I am using following method for upload the file <strong>put_block_blob_from_path()</strong></p>
  
  <p>is there any way to retain default content type? Thanks</p>