remove cellzero default value

Author: nheir

sage_widget_adapters/generic_grid_view_adapter.py

@@ -210,22 +210,19 @@ def make_dirty(self, l, dirty={}):
             sage: ga.make_dirty(t.to_list(), {(0,2):0, (0,3):0})
             [[1, 2], [3, 7], [4]]
         """
-        cellzero = None
-        if hasattr(self, 'cellzero'):
-            cellzero = self.cellzero
         for p in dirty:
             if p[0] < len(l):
                 if p[1] < len(l[p[0]]):
                     l[p[0]][p[1]] = dirty[p]
-                elif len(l[p[0]]) <= p[1] and dirty[p] != cellzero:
+                elif len(l[p[0]]) <= p[1] and dirty[p] != self.cellzero:
                     # padding with cellzero
-                    l[p[0]] += [cellzero] * (p[1] - len(l[p[0]]))
+                    l[p[0]] += [self.cellzero] * (p[1] - len(l[p[0]]))
                     l[p[0]].append(dirty[p])
             else:
                 for i in range(p[0] - len(l)):
                     l.append([])
                 l.append([cellzero] * p[1] + [dirty[p]])
-        l = [[ val for val in row if val != cellzero ] for row in l]
+        l = [[ val for val in row if val != self.cellzero ] for row in l]
         return [val for val in l if val]
 
     def set_cell(self, obj, pos, val, dirty={}, constructorname=''):
@@ -240,6 +237,7 @@ def set_cell(self, obj, pos, val, dirty={}, constructorname=''):
             sage: from sage.combinat.tableau import Tableau
             sage: t = Tableau([[1, 2, 5, 6], [3, 7], [4]])
             sage: ga = GridViewAdapter()
+            sage: ga.cellzero = None
             sage: ga.set_cell(t, (1,1), 8, constructorname='Tableau')
             [[1, 2, 5, 6], [3, 8], [4]]
             sage: from sage.matrix.constructor import Matrix, matrix