def apply(self, arg_values, settings):
"""See base class."""
try:
return value.OperationValue((arg_values[0].value, arg_values[1].value),
self, arg_values)
except ValueError:
return None
def extract_values_with_collapsed_subtrees(
value: value_module.Value) -> List[value_module.Value]:
"""Collapses subtrees, see docstring of extract_examples_from_value."""
if not isinstance(value, value_module.OperationValue):
# Base case: the value is a leaf.
return [value]
value = typing.cast(value_module.OperationValue, value)
results = [] # type: List[value_module.Value]
# Each OperationApplication namedtuple represents one way of reaching this
# Value by applying an operation to some arguments. Choose one at random.
# If we recursed through all possible choices, we would heavily bias the
# dataset toward Values with many possible expressions, e.g., those using many
# commutative ops.
operation_application = random.choice(value.operation_applications)
children_possibilities = [extract_values_with_collapsed_subtrees(child)
for child in operation_application.arg_values]
for children_choices in itertools.product(*children_possibilities):
results.append(value_module.OperationValue(
value=value.value,
operation=operation_application.operation,
arg_values=children_choices))
# Include the case where the entire AST is replaced with a new input. Skip
# tensor conversion, meaning don't convert a tuple of tensors into a single
# tensor with one greater rank; keep the object as-is.
results.append(value_module.InputValue(value=value.value,
name=NEW_INPUT_NAME,
skip_tensor_conversion=True))
return results
def apply(self, arg_values, settings):
"""See base class."""
try:
return value.OperationValue(
arg_values[0].value[:, int(arg_values[1].value)], self, arg_values)
except Exception: # pylint: disable=broad-except
return None
def apply(self, arg_values, settings):
"""See base class."""
try:
result = self._evaluate_slice(
[arg_values[0].value] +
[int(arg_value.value) for arg_value in arg_values[1:]])
return value.OperationValue(result, self, arg_values)
except Exception: # pylint: disable=broad-except
return None
def apply(self, arg_values, settings):
"""See base class."""
value_objects = [arg_value.value for arg_value in arg_values]
arg_dict = dict(zip(self.arg_names, value_objects))
arg_dict.update(self.constant_kwargs)
try:
result_value = self._function_obj(**arg_dict)
except Exception: # pylint: disable=broad-except
return None
try:
return value.OperationValue(result_value, self, arg_values)
except ValueError:
if settings.printing.tensor_size_warnings:
self._print_warnings(arg_values, result_value)
return None
def test_reconstruct_expression(self):
tensor_value = value.InputValue([[1, 3, 2], [-3, 0, 4]], 'my_input')
axis_value = value.ConstantValue(1)
operation_value = value.OperationValue(tf.constant([3, 4]),
self.operation,
[tensor_value, axis_value])
expected_expression = 'tf.reduce_max(my_input, axis=1)'
self.assertEqual(operation_value.reconstruct_expression(),
expected_expression)
self.assertEqual(operation_value.reconstruct_expression(),
expected_expression) # Cached.
operation_value_apply = self.operation.apply([tensor_value, axis_value],
self.settings)
self.assertEqual(operation_value, operation_value_apply)
self.assertEqual(operation_value_apply.reconstruct_expression(),
expected_expression)
def apply(self, arg_values, settings):
"""See base class."""
return value.OperationValue(arg_values[0].value + arg_values[1].value,
self, arg_values)