code: def __call__(self, *args, **kwargs):
      return self.fun(*args, **kwargs)
  
imports: from inspect import signature
  from itertools import chain
  from functools import reduce
  import pytest
  import numpy
  import pennylane
  from pennylane import numpy
  from pennylane.fourier.reconstruct import _reconstruct_equ, _reconstruct_gen, _prepare_jobs, reconstruct
  from pennylane.fourier.utils import join_spectra
label_desc: Use image node_id 2 for calling the Lambda obj's underlying member method code with example usage: obj.__call__() and returns: self