def get(self, key, default=None):
        try:
            val = self[key]
        except KeyError:
            return default
        if val == []:
            return default
        return val
Return the fileHandle whose ID matches the dataFileHandleId in an entity bundle
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-0.96/django/utils/datastructures.py/MultiValueDict.get--crossover with--dataset/ETHPy150Open Sage-Bionetworks/synapsePythonClient/synapseclient/utils.py/find_data_file_handle