code: def queryDataCollectionByName(self, countryName):
          
          var = self._dataCollectionCodes
          try:
              return [x[0] for x in var[var['Countries'] == countryName]]
          except:
              return None
docs: returns a list of available data collections for a given country
          name.
  
          Inputs:
             countryName - name of the country to file the data collection.
          Output:
             list or None. None implies could not find the countryName