title: How to select specific columns in numpy array?
body: <p>Supposing I have 20x100 numpy array. I want to select all columns except say 50th. 
  So I was following this thread <a href="https://stackoverflow.com/questions/8386675/extracting-specific-columns-in-numpy-array">Extracting specific columns in numpy array</a>
  but it didn't help. I tried using </p>
  
  <pre><code> x=Z[:,[:49,51:]] 
  </code></pre>
  
  <p>but was giving error. In R it is easy to do this  </p>
  
  <pre><code>x=Z[,c(1:49,51:100)] 
  </code></pre>
  
  <p>But could not figure out in Python. 
  Please help. Thanks</p>