Merge pull request #499 from nilaybhatia/vgroup-vdict-printable

Make VGroup and VDict printable

Author: leotrs

docs/source/changelog.rst

@@ -60,7 +60,7 @@ Mobjects, Scenes, and Animations
 #. The :code:`Container` class has been made into an AbstractBaseClass, i.e. in cannot be instantiated.  Instead, use one of its children classes
 #. The ``TextMobject`` and ``TexMobject`` objects have been deprecated, due to their confusing names, in favour of ``Tex`` and ``MathTex``. You can still, however, continue to use ``TextMobject`` and ``TexMobject``, albeit with Deprecation Warnings constantly reminding you to switch.
 #. Add a :code:`Variable` class for displaying text that continuously updates to reflect the value of a python variable.
-
+#. :code:`VGroup` now supports printing the class names of contained mobjects and :code:`VDict` supports printing the internal dict of mobjects
 
 
 Documentation

manim/mobject/mobject.py

@@ -62,7 +62,7 @@ def __init__(self, **kwargs):
         self.generate_points()
         self.init_colors()
 
-    def __str__(self):
+    def __repr__(self):
         return str(self.name)
 
     def reset_points(self):

manim/mobject/types/vectorized_mobject.py

@@ -876,6 +876,14 @@ def __init__(self, *vmobjects, **kwargs):
         VMobject.__init__(self, **kwargs)
         self.add(*vmobjects)
 
+    def __repr__(self):
+        return (
+            self.__class__.__name__
+            + "("
+            + ", ".join(str(mob) for mob in self.submobjects)
+            + ")"
+        )
+
     def add(self, *vmobjects):
         """Checks if all passed elements are an instance of VMobject and then add them to submobjects
 
@@ -934,6 +942,9 @@ def __init__(self, mapping_or_iterable={}, show_keys=False, **kwargs):
         self.submob_dict = {}
         self.add(mapping_or_iterable)
 
+    def __repr__(self):
+        return __class__.__name__ + "(" + repr(self.submob_dict) + ")"
+
     def add(self, mapping_or_iterable):
         """Adds the key-value pairs to the :class:`VDict` object.