'''
	Sample.py

	This file contains a template to follow for creating a new
	operation object. The filename should the lowercase version
	of the class name, plus a .py extension.
'''

from Condition import Operation

class Sample(Operation.Operation):
	'''Every Operation must inherit from the base Operation class
	found in the operation module. The operations module contains
	abstract classes that can make this process easier, especially
	in terms of argument and return value type chekcing. At the 
	moment these convienence classes are:
		
		NumericalOperation
		BooleanOperation

	If you choose not to have your class inherit from one of the
	above, be aware that the base Operation class defines the following
	default values:
		
		parameter_types = (object)
		return_type = (object)
		
	The abstract subclasses listed above overwrite any number of these
	values. To overwrite any of these, simply redefine them as class
	attributes outside any class methods (alternatively you can define
	them using self in the constructor).

	parameterTypes should be tuple representing the types for each
	non-keyword argument based on position. For example if you require
	the first argument to be an int and the second a string or list:
		
		parameter_types = (int, (str, list))

	return_type should be a tuple containing any number of types that
	the return value of evaluate must be.
	'''
	
	def evaluate(self, *args):
		'''The only required method to overwrite is
		evaluate. The args parameter should be a list of items. 
		Returns the value of the operation.
		'''
		
		# Put logic here
		return None