title: module.__init__() takes at most 2 arguments error in Python
body: <p>I have 3 files, factory_imagenet.py, imdb.py and imagenet.py</p>
  
  <p><strong>factory_imagenet.py has:</strong></p>
  
  <pre><code>import datasets.imagenet
  </code></pre>
  
  <p>It also has a function call as       </p>
  
  <pre><code>datasets.imagenet.imagenet(split,devkit_path))
  ...
  </code></pre>
  
  <p><strong>imdb.py has:</strong></p>
  
  <pre><code>class imdb(object):
  def __init__(self, name):
      self._name = name
      ...
  </code></pre>
  
  <p><strong>imagenet.py has:</strong></p>
  
  <pre><code>import datasets
  import datasets.imagenet
  import datasets.imdb
  </code></pre>
  
  <p>It also has </p>
  
  <pre><code>class imagenet(datasets.imdb):
      def __init__(self, image_set, devkit_path=None):
          datasets.imdb.__init__(self, image_set)
  </code></pre>
  
  <p>All three files are in the datasets folder.</p>
  
  <p>When I am running another script that interacts with these files, I get this error:</p>
  
  <pre><code>Traceback (most recent call last):
    File "./tools/train_faster_rcnn_alt_opt.py", line 19, in &lt;module&gt;
      from datasets.factory_imagenet import get_imdb
    File "/mnt/data2/abhishek/py-faster-rcnn/tools/../lib/datasets/factory_imagenet.py", line 12, in &lt;module&gt;
      import datasets.imagenet
    File "/mnt/data2/abhishek/py-faster-rcnn/tools/../lib/datasets/imagenet.py", line 21, in &lt;module&gt;
      class imagenet(datasets.imdb):
  TypeError: Error when calling the metaclass bases
  module.__init__() takes at most 2 arguments (3 given)
  </code></pre>
  
  <p>What is the problem here and what is the intuitive explanation to how to solve such inheritance problems? </p>