code: def test_fail_on_mismatching_dimensionality(self):
      from lasagne.layers.conv import BaseConvLayer
  
      with pytest.raises(ValueError) as exc:
          BaseConvLayer((10, 20, 30), 1, 3, n=2)
      assert "Expected 4 input dimensions" in exc.value.args[0]
      with pytest.raises(ValueError) as exc:
          BaseConvLayer((10, 20, 30, 40), 1, 3, n=1)
      assert "Expected 3 input dimensions" in exc.value.args[0]
  
imports: import numpy
  import pytest
  import importlib
  import theano
  from theano import tensor
  import lasagne
  from lasagne.utils import floatX, as_tuple
label_desc: Use image node_id 3 for calling the TestBaseConvLayer obj's underlying member method code with example usage: obj.test_fail_on_mismatching_dimensionality() without return types