To instantiate the python class, we need to get the class name first. This is achieved by following code
def get_class( kls ):
parts = kls.split('.')
module = ".".join(parts[:-1])
m = __import__( module )
for comp in parts[1:]:
m = getattr(m, comp)
return mm is the class
We can instantiate this class as follows
a = m() b = m(arg1, arg2) # passing args to the constructor