Importing scenes not detected

[erooke]

Description of bug / unexpected behavior

Importing a scene from one file does not expose it in another file.

Expected behavior

I have scenes in multiple files. I was hoping to be able to import them into one main module so I had a single entry point into the animations for this project. I would expect manim to detect the scenes in that module but it does not seem to.

How to reproduce the issue

Code for reproducing the problem

# scene_a.py
from manim import *


class CreateCircle(Scene):
    def construct(self):
        circle = Circle()  # create a circle
        circle.set_fill(PINK, opacity=0.5)  # set the color and transparency
        self.play(Create(circle))  # show the circle on screen

# main.py
from scene_a import CreateCircle

Logs

Terminal output

manim -v DEBUG main.py
Manim Community v0.19.0

[06/03/25 13:24:15] ERROR                                                                                                                                                                                        module_ops.py:93
                                There are no scenes inside that module                                                                                                                                                           
                                                                                                                                                                                                                                 

System specifications

System Details

• OS (with version, e.g., Windows 10 v2004 or macOS 10.15 (Catalina)): Linux 6.12.21 x86_64 GNU/Linux
• Python version (python/py/python3 --version): 3.12.9
• Installed modules (provide output from pip list):

Package              Version
-------------------- -----------
annotated-types      0.7.0
asttokens            3.0.0
av                   13.1.0
beautifulsoup4       4.12.3
brotlicffi           1.1.0.0
certifi              2024.12.14
cffi                 1.17.1
chardet              5.2.0
charset-normalizer   3.4.1
click                8.1.8
click-default-group  1.2.4
cloup                3.0.5
contourpy            1.3.1
cycler               0.12.1
decorator            5.1.1
executing            2.1.0
fonttools            4.55.3
glcontext            3.0.0
idna                 3.10
ipython              8.32.0
isosurfaces          0.1.2
jedi                 0.19.2
Jinja2               3.1.5
kiwisolver           1.4.8
lxml                 5.3.0
manim                0.19.0
manim-slides         5.4.2
ManimPango           0.6.0
mapbox_earcut        1.0.3
markdown-it-py       3.0.0
MarkupSafe           3.0.2
matplotlib           3.10.0
matplotlib-inline    0.1.7
mdurl                0.1.2
moderngl             5.12.0
moderngl-window      3.1.1
networkx             3.4.2
numpy                2.2.3
packaging            24.2
parso                0.8.4
pexpect              4.9.0
pillow               11.1.0
pip                  24.0
prompt_toolkit       3.0.48
ptyprocess           0.7.0
pure_eval            0.2.3
pycairo              1.27.0
pycparser            2.22
pydantic             2.10.5
pydantic_core        2.27.2
pydantic-extra-types 2.10.2
pydub                0.25.1
pyglet               2.0.10
PyGLM                2.7.3
Pygments             2.19.1
pyparsing            3.2.1
python-dateutil      2.9.0.post0
python-pptx          1.0.2
QtPy                 2.4.3
requests             2.32.3
rich                 13.9.4
rtoml                0.10.0
scipy                1.15.2
screeninfo           0.8.1
semver               3.0.3
six                  1.17.0
skia-pathops         0.8.0.post2
soupsieve            2.6
srt                  3.5.3
stack_data           0.6.3
svgelements          1.9.6
toml                 0.10.2
tqdm                 4.67.1
traitlets            5.14.3
typing_extensions    4.12.2
urllib3              2.3.0
watchdog             6.0.0
wcwidth              0.2.13
XlsxWriter           3.2.0

[OliverStrait]

Imported Scenes are purely blocked by this line:

manim/manim/utils/module_ops.py

Line 82 in 3d029c1

and obj.__module__.startswith(module.__name__)

This line has been there from the creationof this functionality. I cannot figure out if there actually is some good reasons not to allow imported Scenes to be found or if this is just Inherited artifact.

[OliverStrait]

I figure it out, this limitation is put into place because all subtypes of Scene still are in same import space. So those will appear alongside with user Scenes.

[henrikmidtiby]

If you adapt your code to the following, you should be able to render the scene named CreateCircleLocal which is identical to the CreateCircle scene defined in scene_a.py.

# main.py
from scene_a import CreateCircle

class CreateCircleLocal(CreateCircle):
    ...