example.py

class Demo:
  def __init__(self, n):
    self.iv = n
  
  def hello(self):
    return "Hello, self.iv = %s" % self.iv
  

k = Demo(99)
m = getattr(k, "hello")
print m() # Hello, self.iv = 99
n = k.hello
print n() # Hello, self.iv = 99

# EVAL
print eval("Demo(99).hello()") #  Hello, self.iv = 99It

# EX 2
class Adding:
  def add(self, v1, v2):
    return v1 + v2
  
  def compute(self, method_object, value1, value2):
    return method_object(value1, value2)

calc = Adding()
print calc.compute(getattr(calc, 'add'), 4, 5) # 9