Merge pull request #212 from LaurentBlanc73/master

 check for native endianness

mdfreader/mdfreader.py

@@ -1529,11 +1529,15 @@ def return_pandas_dataframe(self, master_channel_name):
                     temporary_dataframe = pd.DataFrame(index=self.get_channel_data(master_channel_name))
             else:  # no master channel
                 temporary_dataframe = pd.DataFrame()
-            for channel in self.masterChannelList[master_channel_name]:
-                data = self.get_channel_data(channel)
+            channel_dict = {key: None for key in self.masterChannelList[master_channel_name]}
+            for key, value in channel_dict.items():
+                data = self.get_channel_data(key)
+                if data.dtype.byteorder not in ['=', '|']:
+                    data = data.byteswap().newbyteorder()
                 if data.ndim == 1 and data.shape[0] == temporary_dataframe.shape[0] \
                         and not data.dtype.char == 'V':
-                    temporary_dataframe[channel] = data
+                    value = data
+            temporary_dataframe = pd.DataFrame(data=channel_dict, index=temporary_dataframe.index)
             return temporary_dataframe
         else:
             warn('Master channel name not in mdf')