utils: Move and reuse apply_all

Author: ales-erjavec

Orange/widgets/utils/__init__.py

@@ -1,5 +1,7 @@
 import inspect
 import sys
+from collections import deque
+from typing import TypeVar, Deque, Callable, Any, Iterable
 
 from AnyQt.QtCore import QObject
 
@@ -77,3 +79,14 @@ def mypredicate(x):
     else:
         mypredicate = predicate
     return inspect.getmembers(obj, mypredicate)
+
+
+
+_T1 = TypeVar("_T1")
+
+
+def apply_all(seq, op):
+    # type: (Iterable[_T1], Callable[[_T1], Any]) -> None
+    """Apply `op` on all elements of `seq`."""
+    # from itertools recipes `consume`
+    deque(map(op, seq), maxlen=0)

Orange/widgets/utils/graphicstextlist.py

@@ -7,15 +7,12 @@
     QGraphicsWidget, QSizePolicy, QGraphicsItemGroup, QGraphicsSimpleTextItem,
     QGraphicsItem, QGraphicsScene, QGraphicsSceneResizeEvent
 )
+from . import apply_all
 from .graphicslayoutitem import scaled
 
 __all__ = ["TextListWidget"]
 
 
-def apply_all(iter, op):
-    for el in iter:  op(el)
-
-
 class TextListWidget(QGraphicsWidget):
     """
     A linear text list widget.

Orange/widgets/visualize/utils/heatmap.py

@@ -1,11 +1,9 @@
 import math
 import enum
-from collections import deque
 from itertools import chain, zip_longest
 
 from typing import (
-    Optional, List, NamedTuple, Iterable, Sequence, Tuple, Dict, TypeVar,
-    Callable, Any, Deque, Union,
+    Optional, List, NamedTuple, Sequence, Tuple, Dict, Union,
 )
 
 import numpy as np
@@ -24,6 +22,7 @@
 
 from Orange.clustering import hierarchical
 from Orange.clustering.hierarchical import Tree
+from Orange.widgets.utils import apply_all
 from Orange.widgets.utils.colorpalettes import DefaultContinuousPalette
 from Orange.widgets.utils.graphicslayoutitem import SimpleLayoutItem, scaled
 from Orange.widgets.utils.graphicspixmapwidget import GraphicsPixmapWidget
@@ -33,16 +32,6 @@
 from Orange.widgets.utils.dendrogram import DendrogramWidget
 
 
-_T1 = TypeVar("_T1")
-
-
-def apply_all(seq, op):
-    # type: (Iterable[_T1], Callable[[_T1], Any]) -> None
-    """Apply `op` on all elements of `seq`."""
-    d = deque(maxlen=0)  # type: Deque[_T1]
-    d.extend(map(op, seq))
-
-
 def leaf_indices(tree: Tree) -> Sequence[int]:
     return [leaf.value.index for leaf in hierarchical.leaves(tree)]