class_docstr: Class for the Numpy  backend.
code: def from_numpy(x):
      return x
  
imports: import numpy
  from scipy.spatial.distance import cdist, pdist
  from sklearn.metrics.pairwise import euclidean_distances, pairwise_distances
label_desc: Use image node_id 5 for calling the NumPyBackend obj's underlying member method code with example usage: obj.from_numpy(x) and returns: x