title: How to read first and last column in pandas?
body: <p>I looking for solution but can't find anything working.</p>
  <p>So I have a txt file. It's looks like this:</p>
  <pre><code>geneName1, sampleName1, Allel, allel2, 055, 33, tumor
  geneName2, sampleName1, Allel, allel2, 321, 1, ntn
  geneName3, sampleName1, Allel, allel2, 32, 44, ddd
  geneName4, sampleName1, Allel, allel2, 123, 2, aga2
  geneName1, sampleName2, Allel, allel2, 01255, 23, tumorD
  geneName2, sampleName2, Allel, allel2, 33, 1, ad2
  geneName1, sampleName3, Allel, allel2, yyu
  geneName2, sampleName3, Allel, allel2, hhf
  geneName4, sampleName3, Allel, allel2, vgv
  geneName5, sampleName3, Allel, allel2, aga5
  </code></pre>
  <p>And it's don't have a header. But for clear:</p>
  <pre><code>nameOfGene, sampleNumber, Allel1, Allel2, GS1, GS2, descr
  </code></pre>
  <p>Do as u can see some lines has not <code>GS1</code>, <code>GS2</code> data, but all have a <code>descr</code>.
  All what I need is <code>[nameOfGene,sampleNumber,Allel1,Allel2,descr]</code></p>
  <p>And that's the problem. I tried many solution from internet but can't solve it.</p>
  <p>I tried to modify <code>usecols=[]</code> parameter in <code>pd.read_csv</code> to <code>usecols=[0,1,2,3,4,:-1]</code>, but pandas don't understand something like that and I got olny syntax error.
  I tried read whole df but then <code>desc</code> is readed as <code>GS1</code> (if <code>GS1</code> is not in line).</p>
  <p>I tried <code>concat</code>, but result is the same like above, and when line don't have GS1 the desc is loaded as GS1, and next to cols are 0 or NaN.</p>
  <p>Maybe I just ommit something and exist good solution to solve that problem?</p>