import json

book = moneydance.getCurrentAccountBook()
currencies = book.getCurrencies()

def dump_symbol_attributes(filename):
    output = []

    for currency in currencies:
        out_dict = {}
        keys = currency.getParameterKeys()
        for key in keys:
            out_dict[key] =  currency.getParameter(key)
        if 'ticker' in out_dict.keys(): #keep only securities
            output += [out_dict]
        else:
            pass
        print out_dict

    with open(filename, 'w') as file:
         file.write(json.dumps(output))

    return output

if __name__ == '__main__':
    filename = 'location where output file is saved'
    print dump_symbol_attributes(filename)