code: def get_operator(self):
      def l2_norm(x, axis=None, keepdims=False):
          return np.sqrt(
              np.sum(np.square(x), axis=axis, keepdims=keepdims)
          )
  
      return l2_norm
  
imports: import scipy
  from ._op_reqs import *
label_desc: Use image node_id 2 for calling the reduce_l2_norm obj's underlying member method code with example usage: obj.get_operator() and returns: l2_norm, np