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Make sure Flax pipelines can be loaded into PyTorch #4971

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Merged
patrickvonplaten merged 3 commits into from
Sep 11, 2023
+15 −2
Merged

Make sure Flax pipelines can be loaded into PyTorch #4971

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e06c581
Make sure Flax pipelines can be loaded into PyTorch
patrickvonplaten Sep 11, 2023
bcfad60
add test
patrickvonplaten Sep 11, 2023
d3350da
Update src/diffusers/pipelines/pipeline_utils.py
patrickvonplaten Sep 11, 2023
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7 changes: 6 additions & 1 deletion src/diffusers/pipelines/pipeline_utils.py
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Original file line number Diff line number Diff line change
Expand Up @@ -342,7 +342,12 @@ def _get_pipeline_class(
return class_obj

diffusers_module = importlib.import_module(class_obj.__module__.split(".")[0])
pipeline_cls = getattr(diffusers_module, config["_class_name"])
class_name = config["_class_name"]

if class_name.startswith("Flax"):
class_name = class_name[4:]

pipeline_cls = getattr(diffusers_module, class_name)

if load_connected_pipeline:
from .auto_pipeline import _get_connected_pipeline
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10 changes: 9 additions & 1 deletion tests/pipelines/test_pipelines.py
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Original file line number Diff line number Diff line change
Expand Up @@ -57,7 +57,7 @@
UniPCMultistepScheduler,
logging,
)
from diffusers.pipelines.pipeline_utils import variant_compatible_siblings
from diffusers.pipelines.pipeline_utils import _get_pipeline_class, variant_compatible_siblings
from diffusers.schedulers.scheduling_utils import SCHEDULER_CONFIG_NAME
from diffusers.utils import (
CONFIG_NAME,
Expand Down Expand Up @@ -805,6 +805,14 @@ def test_download_ignore_files(self):
assert not any(f in ["vae/diffusion_pytorch_model.bin", "text_encoder/config.json"] for f in files)
assert len(files) == 14

def test_get_pipeline_class_from_flax(self):
flax_config = {"_class_name": "FlaxStableDiffusionPipeline"}
config = {"_class_name": "StableDiffusionPipeline"}

# when loading a PyTorch Pipeline from a FlaxPipeline `model_index.json`, e.g.: https://huggingface.co/hf-internal-testing/tiny-stable-diffusion-lms-pipe/blob/7a9063578b325779f0f1967874a6771caa973cad/model_index.json#L2
# we need to make sure that we don't load the Flax Pipeline class, but instead the PyTorch pipeline class
assert _get_pipeline_class(DiffusionPipeline, flax_config) == _get_pipeline_class(DiffusionPipeline, config)


class CustomPipelineTests(unittest.TestCase):
def test_load_custom_pipeline(self):
Expand Down