Dynamic method invocation in python

In this article will see how to invoke a method with arguments

Code :

#sample class

class demo:

#method need to be invoked dynamically

def mymethod(self,myarg):

print(myarg)

#method to invoke a method in object

def invoke_method(method_name,args,obj):

kwargs =args

#get the method from the instance

method=getattr(obj,method_name)

return method(**kwargs)

#argument & value object

arg ={"myarg" : "hello world"}

invoke_method('mymethod',arg,demo())

How it works

1. Created a sample class demo with a method mymethod
2. new method invoke_method takes three method name , arguments (name value pairs),instance of the object
3. Method object is fetched for the instance using getattr() function
4. Method was invoked with keyworded arguments (**kwargs) - more on kwargs