code: def norm(x, ord=None, axis=None):
      if axis is None:
          return _torch.linalg.norm(x, ord=ord)
      return _torch.linalg.norm(x, ord=ord, dim=axis)
  
file_path: geomstats/geomstats/_backend/pytorch/linalg.py
imports: import numpy
  import scipy
  import torch
  from .._backend_config import np_atol
  from ..numpy import linalg
  from ._dtype import _cast_out_to_input_dtype
label_desc: Use image node_id 3 for calling a global function with example usage: norm(x, ord, axis) and returns: _torch, _torch