add type validation

src/tablib/core.py

@@ -504,7 +504,10 @@ def pop(self):
     def get(self, index):
         """Returns the row from the :class:`Dataset` at the given index."""
 
-        return self[index]
+        if isinstance(index, int):
+            return self[index]
+
+        raise TypeError('Row indices must be integers.')
 
     # -------
     # Columns

tests/test_tablib.py

@@ -209,6 +209,9 @@ def test_get(self):
         with self.assertRaises(IndexError):
             self.founders.get(3)
 
+        with self.assertRaises(TypeError):
+            self.founders.get('first_name')
+
     def test_get_col(self):
         """Verify getting columns by index"""