title: Pandas guess delimiter with sep=None
body: <p><a href="http://pandas.pydata.org/pandas-docs/version/0.15.2/io.html#io-read-csv-table" rel="noreferrer">Pandas documentation</a> has this:</p>
  
  <blockquote>
    <p>With sep=None, read_csv will try to infer the delimiter automatically
    in some cases by “sniffing”.</p>
  </blockquote>
  
  <p>How can I access pandas' guess for the delimiter?</p>
  
  <p>I want to read in 10 lines of my file, have pandas guess the delimiter, and start up my GUI with that delimiter already selected. But I don't know how to access what pandas thinks is the delimiter. </p>
  
  <p>Also, is there a way to pass pandas a list of strings to restrict it's guesses to?</p>