nn progress up to introduction of weights and biases

animation/transform.py

@@ -110,6 +110,10 @@ class GrowFromCenter(GrowFromPoint):
     def __init__(self, mobject, **kwargs):
         GrowFromPoint.__init__(self, mobject, mobject.get_center(), **kwargs)
 
+class GrowArrow(GrowFromPoint):
+    def __init__(self, arrow, **kwargs):
+        GrowFromPoint.__init__(self, arrow, arrow.get_start(), **kwargs)
+
 class SpinInFromNothing(GrowFromCenter):
     CONFIG = {
         "path_func" : counterclockwise_path()

mobject/mobject.py

@@ -100,12 +100,15 @@ class Mobject(object):
         )
 
     def copy(self):
-        copy_mobject = copy.copy(self)
-        copy_mobject.points = np.array(self.points)
-        copy_mobject.submobjects = [
-            submob.copy() for submob in self.submobjects
-        ]
-        return copy_mobject
+        #TODO, either justify reason for shallow copy, or
+        #remove this redundancy everywhere
+        return self.deepcopy() 
+        # copy_mobject = copy.copy(self)
+        # copy_mobject.points = np.array(self.points)
+        # copy_mobject.submobjects = [
+        #     submob.copy() for submob in self.submobjects
+        # ]
+        # return copy_mobject
 
     def deepcopy(self):
         return copy.deepcopy(self)

topics/number_line.py

@@ -19,7 +19,7 @@ class NumberLine(VMobject):
         "numbers_to_show" : None,
         "longer_tick_multiple" : 2,
         "number_at_center" : 0,
-        "number_scale_val" : 0.5,
+        "number_scale_val" : 0.75,
         "line_to_number_vect" : DOWN,
         "line_to_number_buff" : MED_SMALL_BUFF,
         "include_tip" : False,