test.py

from diffusers.modular_pipelines import ModularPipelineBlocks

expander_qwen = ModularPipelineBlocks.from_pretrained(
    "diffusers-internal-dev/qwen-prompt-expander",
    trust_remote_code=True,
)
expander_qwen = expander_qwen.init_pipeline()
output = expander_qwen(prompt="a dog sitting by the river, watching the sunset")
print(f"{output.values['prompt']=}")