1 files changed, 67 insertions, 0 deletions
diff --git a/rigify/utils/misc.py b/rigify/utils/misc.py
index 2ca7b016..b0f79ea7 100644
--- a/rigify/utils/misc.py
+++ b/rigify/utils/misc.py
@@ -19,8 +19,12 @@
 # <pep8 compliant>
 
 import math
+import collections
+
+from itertools import tee, chain, islice, repeat
 from mathutils import Vector, Matrix, Color
 
+
 #=============================================
 # Math
 #=============================================
@@ -82,6 +86,49 @@ def gamma_correct(color):
 
 
 #=============================================
+# Iterators
+#=============================================
+
+
+def padnone(iterable, pad=None):
+    return chain(iterable, repeat(pad))
+
+
+def pairwise_nozip(iterable):
+    "s -> (s0,s1), (s1,s2), (s2,s3), ..."
+    a, b = tee(iterable)
+    next(b, None)
+    return a, b
+
+
+def pairwise(iterable):
+    "s -> (s0,s1), (s1,s2), (s2,s3), ..."
+    a, b = tee(iterable)
+    next(b, None)
+    return zip(a, b)
+
+
+def map_list(func, *inputs):
+    "[func(a0,b0...), func(a1,b1...), ...]"
+    return list(map(func, *inputs))
+
+
+def skip(n, iterable):
+    "Returns an iterator skipping first n elements of an iterable."
+    iterator = iter(iterable)
+    if n == 1:
+        next(iterator, None)
+    else:
+        next(islice(iterator, n, n), None)
+    return iterator
+
+
+def map_apply(func, *inputs):
+    "Apply the function to inputs like map for side effects, discarding results."
+    collections.deque(map(func, *inputs), maxlen=0)
+
+
+#=============================================
 # Misc
 #=============================================
 
@@ -98,3 +145,23 @@ def copy_attributes(a, b):
                 setattr(b, key, getattr(a, key))
             except AttributeError:
                 pass
+
+
+def assign_parameters(target, val_dict=None, **params):
+    data = { **val_dict, **params } if val_dict else params
+    for key, value in data.items():
+        try:
+            target[key] = value
+        except Exception as e:
+            raise Exception("Couldn't set {} to {}: {}".format(key,value,e))
+
+
+def select_object(context, object, deselect_all=False):
+    view_layer = context.view_layer
+
+    if deselect_all:
+        for objt in view_layer.objects:
+            objt.select_set(False)  # deselect all objects
+
+    object.select_set(True)
+    view_layer.objects.active = object