class BaseClass(object):
  def commonFunction(self):
    print "tjenis"

class A_1(BaseObject):
  def __init__(self):
    self.name = "class A 1"

class B_1(BaseObject):
  def __init__(self):
    self.name = "class B 1"

myClassName = "B_1"
myObject = myClassName()

print myObject.name
myObject.commonFunction()