title: how to dynamically create an instance of a class in python?
body: <p>I have list of class names and want to create their instances dynamically. for example:</p>
  
  <pre><code>names=[
  'foo.baa.a',
  'foo.daa.c',
  'foo.AA',
   ....
  ]
  
  def save(cName, argument):
   aa = create_instance(cName) # how to do it?
   aa.save(argument)
  
  save(random_from(names), arg)
  </code></pre>
  
  <p>How to dynamically create that instances in Python? thanks!</p>