146 lines
8.9 KiB
Markdown
146 lines
8.9 KiB
Markdown
# blender-python-stubs
|
|
|
|
|
|
|
|
|
|
[](https://pypi.org/project/blender-python-stubs/)
|
|
|
|
Strict type stubs for the Blender Python API. Provides autocomplete, type checking, and inline documentation for `bpy`, `mathutils`, `bmesh`, `gpu`, `freestyle`, and all other Blender Python modules. Generated stubs pass [basedpyright](https://docs.basedpyright.com) `all` mode with 0 errors and use zero `typing.Any`.
|
|
|
|
## Installation
|
|
|
|
```bash
|
|
pip install blender-python-stubs
|
|
```
|
|
|
|
The version matches your target Blender version:
|
|
|
|
| Blender Version | Install Command | PyPI |
|
|
| --------------- | ---------------------------------------------- | ----------------------------------------------------------------------------------------------------------------------- |
|
|
| 5.1 | `pip install "blender-python-stubs>=5.1,<5.2"` | [](https://pypi.org/project/blender-python-stubs/5.1.0.1/) |
|
|
| 5.0 | `pip install "blender-python-stubs>=5.0,<5.1"` | [](https://pypi.org/project/blender-python-stubs/5.0.1.0/) |
|
|
| 4.5 | `pip install "blender-python-stubs>=4.5,<4.6"` | [](https://pypi.org/project/blender-python-stubs/4.5.8.1/) |
|
|
| 4.4 | `pip install "blender-python-stubs>=4.4,<4.5"` | |
|
|
| 4.3 | `pip install "blender-python-stubs>=4.3,<4.4"` | |
|
|
| 4.2 | `pip install "blender-python-stubs>=4.2,<4.3"` | |
|
|
| 4.1 | `pip install "blender-python-stubs>=4.1,<4.2"` | |
|
|
| 4.0 | `pip install "blender-python-stubs>=4.0,<4.1"` | |
|
|
|
|
## Usage
|
|
|
|
Install alongside your Blender addon project for type checking with mypy, pyright, basedpyright, ty or your IDE.
|
|
|
|
```python
|
|
import bpy
|
|
|
|
# Full autocomplete and type checking
|
|
obj = bpy.context.active_object
|
|
assert obj is not None
|
|
obj.location.x = 1.0
|
|
|
|
# Collection types with proper methods
|
|
bpy.data.objects.new("Cube", bpy.data.meshes.new("Mesh"))
|
|
bpy.data.images.remove(bpy.data.images["old"])
|
|
|
|
# GPU module fully typed
|
|
import gpu
|
|
shader = gpu.shader.from_builtin('UNIFORM_COLOR')
|
|
gpu.state.blend_set('ALPHA')
|
|
```
|
|
|
|
## Features
|
|
|
|
- **Full Blender API coverage** — `bpy.types`, `bpy.ops`, `bpy.props`, `bpy.utils`, `bpy.path`, `bpy.app`, `mathutils`, `bmesh`, `gpu`, `gpu_extras`, `bpy_extras`, `freestyle`, `aud`, `blf`, `bl_math`, `imbuf`, `idprop`
|
|
- **Accurate collection types** — `bpy.data.objects` returns `BlendDataObjects` (not generic `bpy_prop_collection`), exposing `new()`, `remove()`, and other collection-specific methods
|
|
- **Readonly properties** — uses `@property` decorators for readonly RNA attributes
|
|
- **Context members** — `bpy.context.active_object`, `selected_objects`, `edit_object`, and ~100 other screen context attributes are properly typed
|
|
- **Constructor signatures** — GPU types, mathutils types (`Vector`, `Matrix`, `Euler`, etc.) have typed `__init__` methods
|
|
- **Literal enum types** — string parameters like `gpu.state.blend_set(mode)` use `Literal["NONE", "ALPHA", ...]` instead of plain `str`
|
|
- **Docstrings** — inline documentation on properties, methods, and functions
|
|
- **Classmethod detection** — `Matrix.Identity()`, `Vector.Fill()`, etc. correctly typed as `@classmethod`
|
|
- **Dunder methods** — `__getitem__`, `__len__`, `__add__`, `__matmul__`, and other operators introspected with correct return types (e.g. `Matrix[0]` returns `Vector`)
|
|
- **Operator metadata** — `bpy.ops.mesh.primitive_cube_add.poll()`, `.idname()`, `.get_rna_type()`, and `.bl_options` are typed via introspected `_BPyOpsSubModOp` wrapper
|
|
- **GPU uniform types** — `shader.uniform_float()` accepts `Matrix`, `Vector`, `Euler`, `Quaternion`, and `Color` in addition to `float | Sequence[float]`, matching the C implementation
|
|
- **Typed `Context.copy()`** — returns a `ContextDict` TypedDict instead of `dict[str, object]`, so unpacking into `context.temp_override(**ctx)` type-checks correctly
|
|
- **Dynamic array types** — `Image.pixels` typed as `bpy_prop_array[float]` (not `list[float]` or `float`)
|
|
- **Zero `Any` usage** — precise types throughout, no `typing.Any` fallbacks
|
|
- **[basedpyright](https://docs.basedpyright.com) `all` mode** — 0 errors on generated stubs (4.0+), validated with `typeCheckingMode: "all"` (the strictest setting)
|
|
|
|
## How It Works
|
|
|
|
Stubs are generated by running introspection **inside Blender itself**. A script runs in Blender's embedded Python interpreter using `--background` mode and collects:
|
|
|
|
1. **RNA type definitions** via `rna_info.BuildRNAInfo()` — all `bpy.types` classes, their properties, methods, inheritance, and readonly status
|
|
2. **C extension signatures** via `inspect.signature()` and RST docstring parsing — for `mathutils`, `bmesh.types`, `gpu.types`, `aud`, etc.
|
|
3. **Screen context members** via `dir(bpy.context)` — dynamically injected context attributes with type inference from runtime values, hardcoded overrides, and name-pattern heuristics
|
|
4. **Collection wrapper classes** via RNA `srna` attributes — maps `bpy.data.objects` to `BlendDataObjects(bpy_prop_collection[Object])` instead of generic `bpy_prop_collection[Object]`
|
|
|
|
The introspection data is then passed through a stub generator that handles type cleaning, import resolution, docstring formatting, and `black` formatting.
|
|
|
|
## Comparison with Alternatives
|
|
|
|
### vs [fake-bpy-module](https://github.com/nutti/fake-bpy-module)
|
|
|
|
| Feature | blender-python-stubs | fake-bpy-module |
|
|
| ------------------------ | -------------------------- | ----------------------------- |
|
|
| `@property` for readonly | Yes (1700+) | No |
|
|
| `Any` usage | 0 | 1800+ |
|
|
| Collection wrapper types | `BlendDataObjects` | `bpy_prop_collection[Object]` |
|
|
| `bpy_struct` methods | Introspected | Missing |
|
|
| `rna_type` attribute | Yes | Missing |
|
|
| Operator metadata | `poll()`, `idname()`, etc. | Missing |
|
|
| Constructor `__init__` | Yes (mathutils, gpu, etc.) | No |
|
|
| Literal enum types | Yes | Yes (via stub_internal) |
|
|
| Context members | ~100 typed | ~100 typed |
|
|
| basedpyright `all` mode | 0 errors (4.0+) | Not tested |
|
|
| Docstrings | Yes | Yes |
|
|
|
|
### vs [bpystubgen](https://github.com/mysticfall/bpystubgen)
|
|
|
|
bpystubgen generates stubs from Blender's Sphinx documentation, not from runtime introspection. This means it can miss C-level methods, dynamic context members, and runtime-only type information. Our approach introspects the actual running Blender instance, ensuring stubs match the real API.
|
|
|
|
## Supported Versions
|
|
|
|
Blender 4.0 through 5.1. Each Blender version gets its own stub package version.
|
|
|
|
## Generating Stubs
|
|
|
|
To generate stubs for a specific Blender version, run:
|
|
|
|
```bash
|
|
uv run poe generate 5.1
|
|
```
|
|
|
|
This will automatically download the corresponding Blender executable and run the introspection and stub generation process. You can also type-check the generated stubs:
|
|
|
|
```bash
|
|
uv run poe typecheck-stubs 5.1
|
|
```
|
|
|
|
## Contributing
|
|
|
|
Pull requests are welcome. The project uses:
|
|
|
|
- `uv` for dependency management
|
|
- `poe` for task running
|
|
- `basedpyright` for type checking
|
|
- `black` for formatting
|
|
- `ruff` for linting
|
|
|
|
```bash
|
|
# Run all checks (format, lint, typecheck, tests)
|
|
uv run poe check
|
|
```
|
|
|
|
## Disclaimer
|
|
|
|
This project was coded with assistance of AI.
|
|
|
|
## License
|
|
|
|
[MIT](LICENSE)
|
|
|
|
---
|
|
|
|
Made with ❤️ at [Autour de Minuit (ADV)](https://blog.autourdeminuit.com/) <img src="https://upload.wikimedia.org/wikipedia/commons/0/0c/Blender_logo_no_text.svg" alt="blender" width="20"/>
|