code: def set_global_backend(backend):
      """Sets the global fft backend
  
      The global backend has higher priority than registered backends, but lower
      priority than context-specific backends set with `set_backend`.
  
      Parameters
      ----------
      backend : {object, 'scipy'}
          The backend to use.
          Can either be a ``str`` containing the name of a known backend
          {'scipy'} or an object that implements the uarray protocol.
  
      Raises
      ------
      ValueError: If the backend does not implement ``numpy.scipy.fft``.
  
      Notes
      -----
      This will overwrite the previously set global backend, which, by default, is
      the SciPy implementation.
  
      Examples
      --------
      We can set the global fft backend:
  
      >>> from scipy.fft import fft, set_global_backend
      >>> set_global_backend("scipy")  # Sets global backend. "scipy" is the default backend.
      >>> fft([1])  # Calls the global backend
      array([1.+0.j])
      """
      backend = _backend_from_arg(backend)
      ua.set_global_backend(backend)
  
file_path: catboost/contrib/python/scipy/py3/scipy/fft/_backend.py
imports: import scipy._lib.uarray
  from .None import _pocketfft
label_desc: Use image node_id 2 for calling a global function with example usage: set_global_backend(backend) without return types