code: def split_from_df(self, col:IntsOrStrs=2):
          "Split the data from the `col` in the dataframe in `self.inner_df`."
          valid_idx = np.where(self.inner_df.iloc[:,df_names_to_idx(col, self.inner_df)])[0]
          return self.split_by_idx(valid_idxf split_from_df(self, col:IntsOrStrs=2):
          "Split the data from the `col` in the dataframe in `self.inner_df`."
          valid_idx = np.where(self.inner_df.iloc[:,df_names_to_idx(col, self.inner_df)])[0]
          return self.split_by_idx(valid_idx)
docs: Split the data from the `col` in the dataframe in `self.inner_df`.