title: How to read CSV file with of data frame with row names in Pandas
body: <p>I have a CSV file  (<code>tmp.csv</code>) that looks like this:</p>
  
  <pre><code>        x       y       z
  bar     0.55    0.55    0.0
  foo     0.3     0.4     0.1
  qux     0.0     0.3     5.55
  </code></pre>
  
  <p>It was created with Pandas this way:</p>
  
  <pre><code>    In [103]: df_dummy 
      Out[103]: 
            x     y     z
      bar  0.55  0.55  0.00
      foo  0.30  0.40  0.10
      qux  0.00  0.30  5.55
  
     In [104]: df_dummy.to_csv("tmp.csv",sep="\t")   
  </code></pre>
  
  <p>What I want to do is to read that CSV into the same dataframe representation.
  I tried this but doesn't give what I want:</p>
  
  <pre><code>In [108]: pd.io.parsers.read_csv("tmp.csv",sep="\t")
  Out[108]: 
    Unnamed: 0     x     y     z
  0        bar  0.55  0.55  0.00
  1        foo  0.30  0.40  0.10
  2        qux  0.00  0.30  5.55
  </code></pre>
  
  <p>What's the right way to do it?</p>