Make a list of a class's methods and dynamically call the methods on the class

Question

Is it possible to get a list of class's methods and then invoke the methods on an instance of the class? I have come across code that makes a list of a class's methods, but I haven't found an example that also invokes the methods on an instance of the class.

Given the class:

class Test:

def methodOne(self):
    print 'Executed method one'


def methodTwo(self):
    print 'Executed method two'

And you make a list of the class's methods:

import inspect

a = Test()

methodList = [n for n, v in inspect.getmembers(a, inspect.ismethod)]

I would like to invoke every method in the methodList on an instance of the class, like:

for method in methodList:
     a.method()

The result would be equivalent to:

a.methodOne()
a.methodTwo()

Answer 1

Use getattr(a,methodname) to access the actual method, given the string name, methodname:

import inspect
import types

class Test(object):
   def methodOne(self):
      print('one')
   def methodTwo(self):
      print('two')

a = Test()    
methodList = [n for n, v in inspect.getmembers(a, inspect.ismethod)
              if isinstance(v,types.MethodType)]

for methodname in methodList:
   func=getattr(a,methodname)
   func()

yields

one
two

---

As Jochen Ritzel points out, if you are more interested in the actual methods (callable objects) than the method names (strings), then you should change the definition of methodList to

methodList = [v for n, v in inspect.getmembers(a, inspect.ismethod)
              if isinstance(v,types.MethodType)]

so you could call the methods directly without needing getattr:

for method in methodList:
    method()

Answer 2

You can call your dynamically obtained methods like this:

for method in methodList:
    getattr(a, method)()

But the problem you will have is that this code will only work for methods that don't take any parameters.