VGroup can now be initialized with VMobject iterables

[NikhilaGurusinghe]

Overview

Updates the add method within the VGroup class to allow it to accept iterables, including generators, and, as was the case before this PR, individual VMobject instances or a list of them. Tests have been added for both the Cairo renderer and OpenGL. Hence, implementation is compatible with OpenGL.

Closes #3540

Changelog

• VGroup can now be initialized with VMobject iterables, such as generators

Reviewer Checklist

• The PR title is descriptive enough for the changelog, and the PR is labeled correctly
• If applicable: newly added non-private functions and classes have a docstring including a short summary and a PARAMETERS section
• If applicable: newly added functions and classes are tested

[JasonGrace2282]

Overall, looks pretty good, thanks for the PR!

I left a few comments, but I think the one thing we need to add here is some
documentation. Maybe a small example like below is a good idea to add?

class VGroupParseIterablesExample(Scene):
    def construct(self):
        v = VGroup(
            Square(),
            [Circle(), Triangle()],
            Dot(),
            (Dot() for _ in range(2)),
        )
        v.arrange()
        self.add(v)

[NikhilaGurusinghe]

Overall, looks pretty good, thanks for the PR!

I left a few comments, but I think the one thing we need to add here is some documentation. Maybe a small example like below is a good idea to add?

class VGroupParseIterablesExample(Scene):
    def construct(self):
        v = VGroup(
            Square(),
            [Circle(), Triangle()],
            Dot(),
            (Dot() for _ in range(2)),
        )
        v.arrange()
        self.add(v)

Thanks for the example, I've added it plus some slight explanation to the add function's docstring in VGroup. You can see it here via the read the docs build.

Let me know if there's a better place to put it or if you need me to add more documentation! 😄

[JasonGrace2282]

Looks good to me! One minor doc comment, and after that I'll merge this. Thanks for the PR :)

[JasonGrace2282]

Thanks :)

[NikhilaGurusinghe]

Thanks for all your feedback and help!