title: TypeError: 'cmp' is an invalid keyword argument for this function
body: <p>I'm using Python3, but the script is not compatible with this version and I hit some errors. Now I have problem with <code>cmp</code> parameter. Here is the code</p>
  
  <pre><code>def my_cmp(x,y):
      counter = lambda x, items: reduce(lambda a,b:a+b, [list(x).count(xx) for xx in items])
      tmp =  cmp(counter(x, [2,3,4,5]), counter(y, [2,3,4,5]))
      return tmp if tmp!=0 else cmp(len(x),len(y)) 
  
  for i, t in enumerate([tmp[0] for tmp in sorted(zip(tracks, self.mapping[idx][track_selection[-1]].iloc[0]), cmp=my_cmp, key=lambda x:x[1])]):
      img[i,:len(t)] = t
  </code></pre>
  
  <p>I would really appreciate any help how to deal with this error in Python3.</p>