Make a list of class methods and dynamically call class methods

Question

Is it possible to get a list of class methods and then call methods in an instance of the class? I came across code that makes up a list of class methods, but I did not find an example that also calls methods in 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 will create a list of class methods:

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

I would like to call each method in methodList in an instance of the class, for example:

 for method in methodList: a.method() 

The result will 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() 

gives

 one two 

---

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

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

so that you can directly call methods without requiring getattr :

 for method in methodList: method() 

Answer 2

You can call your dynamically obtained methods as follows:

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

But the problem is that this code will only work for methods that take no parameters.

Answer 3

Why do you save the name of the method, not the method itself? inspect.getmembers returns a related method that can be called directly:

 for name, method in inspect.getmembers(a, inspect.ismethod): print "Method", name, "returns", method() 

Answer 4

As David Heffernan noted, this will only work for methods that take no parameters.

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

Answer 5

 for method in methodList: eval ("a.%s()" % method) 

For a method without parameters other than self.