Grid widget __getitem__() returns iterator.

README.md

@@ -1127,7 +1127,7 @@ Constructor args:
  in the `Label` as defined by `lwidth`.
 
 Method:  
- * `__getitem__` Return a list containing one or more `Label` instances.
+ * `__getitem__` Returns an iterator enabling `Label` instances to be accessed.
  * `__setitem__` Assign a value to one or more labels. If multiple labels are
  specified and a single text value is passed, all labels will receive that
  value. If an iterator is passed, consecutive labels will receive values from
@@ -1156,7 +1156,11 @@ grid[1:3, 1:3] = (str(n) for n in range(2))  # Produces
 # 0 1
 # 1 1
 ```
-
+Read access:
+```python
+for label in grid[2, 0:]:
+    v = label.value()  # Access text of each label in row 2
+```
 Example uses:
 ```python
 colwidth = (20, 30)  # Col 0 width is 20, subsequent columns 30

gui/widgets/grid.py

@@ -46,12 +46,10 @@ class Grid(Widget):
             r += self.cheight
             c = col
 
-    def __getitem__(self, *args):  # Return the Label instance
+    def __getitem__(self, *args):
         indices = do_args(args, self.nrows, self.ncols)
-        res = []
         for i in indices:
-            res.append(self.cells[i])
+            yield self.cells[i]
-        return res
 
     # allow grid[[r, c]] = "foo" or kwargs for Label:
     # grid[[r, c]] = {"text": str(n), "fgcolor" : RED}