code: def f(x):
      # dummy function which can be passed as the parameter f to simultaneous_move and single_move
      return 2 * np.log(
          np.random.uniform(low=0, high=1.0, size=np.shape(x)[0])
      )
  
imports: import numpy
  from deepchem.utils.electron_sampler import ElectronSampler
label_desc: Use image node_id 1 for calling a global function with example usage: f(x) and returns: unknown