code: def _einsum_data(self):
      func_name = "einsum"
  
      args = [
          ("...i,...i->...", rand(2, 2), rand(2, 2)),
          ("...i,...i->...", rand(2, 2), rand(2)),
          ("...i,...i->...", rand(2), rand(2, 2)),
          ("...i,...i->...", rand(2), rand(2)),
          ("...,...i->...i", rand(1), rand(1, 3)),
          ("...,...i->...i", rand(1), rand(3)),
          ("...,...i->...i", 5.0, rand(1, 3)),
          ("...,...i->...i", 5.0, rand(3)),
          ("...,...i->...i", rand(3), rand(1, 3)),
          ("...,...i->...i", rand(3), rand(3)),
          ("...ij,...ik->...jk", rand(3, 2, 2), rand(3, 2, 2)),
          ("...ij,...ik->...jk", rand(2, 2), rand(3, 2, 2)),
          ("...ij,...ik->...jk", rand(3, 2, 2), rand(2, 2)),
          ("...ij,...ik->...jk", rand(2, 2), rand(2, 2)),
          ("...i,...ijk->...jk", rand(3), rand(3, 3, 3)),
          ("...i,...ijk->...jk", rand(3), rand(1, 3, 3, 3)),
          ("...i,...ijk->...jk", rand(2, 3), rand(2, 3, 3, 3)),
          ("...i,...ijk->...jk", rand(2, 3), rand(3, 3, 3)),
          ("...k,...j,...i->...kji", rand(3), rand(3), rand(3)),
          ("...k,...j,...i->...kji", rand(2, 3), rand(3), rand(3)),
      ]
      return [{"func_name": func_name, "args": args_} for args_ in args]
  
file_path: geomstats/tests/tests_geomstats/test_backend/data/against_numpy.py
imports: import geomstats.backend
  from geomstats.geometry.spd_matrices import SPDMatrices
  from geomstats.geometry.symmetric_matrices import SymmetricMatrices
  from geomstats.test.data import TestData
label_desc: Use image node_id 4 for calling the AgainstNumpyTestData obj's underlying member method code with example usage: obj._einsum_data() and returns: unknown