code: def parse_all_data(self):
          
          self._master_df.columns = ["domain", "entity", "state", "last_changed"]
  
          # Check if state is float and store in numericals category.
          self._master_df["numerical"] = self._master_df["state"].apply(
              lambda x: functions.isfloat(x)
          )
  
          # Multiindexing
          self._master_df.set_index(
              ["domain", "entity", "numerical", "last_changed"], inplace=True
          )
docs: Parses the master df.