code: def test_dict_callable_unary_callable_unary_without_size(self):
      with self.assertRaises(ValueError):
          tabular.from_data(({"a": lambda i: i * i, "b": lambda i: -i}))
  
imports: import unittest
  import numpy
  import chainer
  from chainer.dataset import tabular
  from chainer import testing
label_desc: Use image node_id 24 for calling the TestFromData obj's underlying member method code with example usage: obj.test_dict_callable_unary_callable_unary_without_size() without return types