code: def validate_query(self, query):
          
          # Make sure all variables are in the dataset
          return bool(query.var) and all(var in self.variables for var in query.var)
docs: Validate a query.
  
          Determines whether `query` is well-formed. This includes checking for all
          required parameters, as well as checking parameters for valid values.
  
          Parameters
          ----------
          query : NCSSQuery
              The query to validate
  
          Returns
          -------
          valid : bool
              Whether `query` is valid.