code: def fetch_data_table(api_key,
                       show_progress,
                       retries):
      
      for _ in range(retries):
          try:
              if show_progress:
                  log.info('Downloading WIKI metadata.')
  
              metadata = pd.read_csv(
                  format_metadata_url(api_key)
              )
              # Extract link from metadata and download zip file.
              table_url = metadata.loc[0, 'file.link']
              if show_progress:
                  raw_file = download_with_progress(
                      table_url,
                      chunk_size=ONE_MEGABYTE,
                      label="Downloading WIKI Prices table from Quandl"
                  )
              else:
                  raw_file = download_without_progress(table_url)
  
              return load_data_table(
                  file=raw_file,
                  index_col=None,
                  show_progress=show_progress,
              )
  
          except Exception:
              log.exception("Exception raised reading Quandl data. Retrying.")
  
      else:
          raise ValueError(
              "Failed to download Quandl data after %d attempts." % (retries)
          )
docs: Fetch WIKI Prices data table from Quandl