update source code

Author: chfw

pyexcel_io/plugins.py

@@ -37,10 +37,10 @@ def add_a_reader(self, relative_plugin_class_path=None,
                      file_types=None, stream_type=None):
         """ add pyexcle-io reader plugin info """
         a_plugin_info = IOPluginInfo(
-                READER_PLUGIN,
-                self._get_abs_path(relative_plugin_class_path),
-                file_types=file_types,
-                stream_type=stream_type)
+            READER_PLUGIN,
+            self._get_abs_path(relative_plugin_class_path),
+            file_types=file_types,
+            stream_type=stream_type)
         return self.add_a_plugin_instance(a_plugin_info)
 
     def add_a_writer(self, relative_plugin_class_path=None,

pyexcel_io/readers/csvr.py

@@ -33,6 +33,12 @@
 
 
 class CSVMemoryMapIterator(compact.Iterator):
+    """
+    Wrapper class for mmap object
+
+    mmap object does not handle encoding at all. This class
+    provide the necessary transcoding for utf-8, utf-16 and utf-32
+    """
     def __init__(self, mmap_obj, encoding):
         self.__mmap_obj = mmap_obj
         self.__encoding = encoding