title: Convert Parquet to CSV
body: <p>How to convert Parquet to CSV from a local file system (e.g. python, some library etc.) but WITHOUT Spark? (trying to find as simple and minimalistic solution as possible because need to automate everything and not much resources).</p>
  
  <p>I tried with e.g. <code>parquet-tools</code> on my Mac but data output did not look correct. </p>
  
  <p>Need to make output so that when data is not present in some columns - CSV will have corresponding NULL (empty column between 2 commas)..</p>
  
  <p>Thanks.</p>