Have problems checking class variable type to ensure that value will be typecasted accordingly

parser.py

def parser(passed_object, request_data):
	for item in request_data.values:
		if hasattr(passed_object, item) and request_data.values.get(item) != None:
			inputval = request_data.values.get(item)
			#TODO: check the corresponding class variable type before typecasting
			setattr(passed_object, item, inputval)
	return passed_object