title: Python Pandas - use Multiple Character Delimiter when writing to_csv
body: <p>It appears that the pandas to_csv function only allows single character delimiters/separators. </p>
  
  <p>Is there some way to allow for a string of characters to be used like, "::" or "%%" instead?</p>
  
  <p>I tried:<br></p>
  
  <pre><code>df.to_csv(local_file,  sep = '::', header=None, index=False)
  </code></pre>
  
  <p>and getting:</p>
  
  <pre><code>TypeError: "delimiter" must be a 1-character string
  </code></pre>