title: np.genfromtxt multiple delimiters?
body: <p>My file looks like this: </p>
  
  <pre><code>1497484825;34425;-4,28,-14;-4,28,-14;-4,28,-14;-4,28,-14;-4,28,-14;-4,28,-14
  1497484837;34476;-4,28,-14;-4,28,-14;-4,28,-14;-4,28,-14;-4,28,-14;-4,28,-14
  </code></pre>
  
  <p>I want to import it into numpy array using np.genfromtxt. The biggest problem is that it has ';' and ',' as delimiters.
  My try:</p>
  
  <pre><code>import numpy as np
  import io
  
  s = io.StringIO(open('2e70dfa1.csv').read().replace(';',','))
  
  data = np.genfromtxt(s,dtype=int,delimiter=',')
  </code></pre>
  
  <p>I get error: </p>
  
  <blockquote>
    <p>TypeError: Can't convert 'bytes' object to str implicitly</p>
  </blockquote>
  
  <p>How to solve it? I'm also open to completely new (better) ideas.</p>