alexhawat hw3

Market.py

class Market(object):
    '''
    classdocs
    '''
    ### THIS IS NOT NEEDED
    #counter is a "Class Variable" for the number of created instances of Currency
    counter = 0

    def __init__(self, ref_date):
        '''
        Constructor
        '''

        self.market_observables = {}
        self.reference_date=ref_date
        ## YOU ALSO NEED A REFERENCE CURRENCY

    def set_market_observable(self, observable):
        ## I RECOMMEND EXPANDING THIS INTERFACE TO TAKE (self, observable_id, observable)
        ## Otherwise, you effectively require all observables to implement an "id"
        ## This is a preference--and you may very well require all Observables to implement
        ## a common method but be aware of this requirement.
        ## Also, don't capitalize ID--sshould be 'obs_id'
        self.market_observables[observable.obs_ID] = observable

    def get_market_observable(self, observable_id):
        return self.market_observables.get(observable_id)

def make(ref_date):
    return Market(ref_date)