class_docstr: A wrapper class for the PARAFAC2 decomposition.
code: def __repr__(self):
      message = f"(weights, factors, projections) : rank-{self.rank} Parafac2Tensor of shape {self.shape} "
      return message
  
imports: from .None import backend
  from .base import unfold, tensor_to_vec
  from ._factorized_tensor import FactorizedTensor
label_desc: Use image node_id 6 for calling the Parafac2Tensor obj's underlying member method code with example usage: obj.__repr__() and returns: message