Schedulers are defined by a configuration file that can be used by a variety of schedulers. Load a scheduler with the [`SchedulerMixin.from_pretrained`] method, and specify the `subfolder` parameter to load the configuration file into the correct subfolder of the pipeline repository.  
For example, to load the [`DDIMScheduler`]:  
```py
from diffusers import DDIMScheduler, DiffusionPipeline