Making instance variable private and adding back data_label method

Author: ryankarlos

pandas/io/stata.py

@@ -1053,7 +1053,7 @@ def _read_new_header(self, first_char):
 
         self.nobs = self._get_nobs()
         self.path_or_buf.read(11)  # </N><label>
-        self.data_label = self._get_data_label()
+        self._data_label = self._get_data_label()
         self.path_or_buf.read(19)  # </label><timestamp>
         self.time_stamp = self._get_time_stamp()
         self.path_or_buf.read(26)  # </timestamp></header><map>
@@ -1731,6 +1731,12 @@ def _do_convert_categoricals(self, data, value_label_dict, lbllist,
         data = DataFrame.from_dict(OrderedDict(cat_converted_data))
         return data
 
+    def data_label(self):
+        """
+        Return data label of Stata file.
+        """
+        return self.data_label
+
     def variable_labels(self):
         """
         Return variable labels as a dict, associating each variable name