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class Foo(object):
  """ Here's a class that prints it's constructor parameter when instantiated. """
  def __init__(self, param):
    print "You made a new foo with param: ", param

def make_instance(class_, param):
  """ This is a method that instantiates a new instance of 'class_' with a single parameter. """
  return class_(param)

x = make_instance(Foo, 'bobobobo')
print x