code: def __dir__():
      backend_name = get_backend()
      if backend_name not in _LOADED_BACKENDS:
          register_sparse_backend(backend_name)
  
      return [
          k
          for k in dir(_LOADED_BACKENDS[backend_name])
          if not k.startswith("_")
      ]
  
file_path: tensorly/tensorly/contrib/sparse/backend/__init__.py
imports: import importlib
  from contextlib import contextmanager
  import functools
  from ....backend import backend_context, get_backend
  from ....None import backend, base, cp_tensor, tucker_tensor, tt_tensor
label_desc: Use image node_id 4 for calling a global function with example usage: __dir__() and returns: unknown