Get the correct length and not the # columns.

cml/ports/source_adapters.py

@@ -99,7 +99,13 @@ class PandasBlock:
 
     @property
     def length(self):
-        return len(self.__data_block)
+        return self.__data_block.shape[0]
+
+    def drop_row(self, index):
+        self.__data_block.drop(index, inplace=True)
+
+    def get_column_values(self, column_name):
+        return self.__data_block[column_name]
 
 
 class PandasAdapter:
@@ -113,7 +119,10 @@ class PandasAdapter:
 
     @property
     def length(self):
-        return len(self.__data_frame)
+        return self.__data_frame.shape[0]
+    
+    def get_block_via_index(self, indexes):
+        return PandasBlock(self.__data_frame.iloc[indexes])
 
     def get_block(self, start, end=None, step=None):
         return PandasBlock(self.__data_frame[start:end:step])