code: def _get_args(self, xs):
      if self.subscript_type == "str":
          return (self.subscripts,) + xs
      else:
          args = []
          subscripts = self.subscripts.split("->")
          for in_subscript, x in zip(subscripts[0].split(","), xs):
              args.extend([x, _from_str_subscript(in_subscript)])
          if len(subscripts) == 2:
              args.append(_from_str_subscript(subscripts[1]))
          return tuple(args)
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer.functions.math import einsum
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
  from chainer import utils
label_desc: Use image node_id 2 for calling the TestEinSum obj's underlying member method code with example usage: obj._get_args(xs) and returns: unknown, tuple