def node_to_graph(node, ctx, nocompile_decorators):
"""Convert Python code to equivalent TF graph mode code.
Args:
node: A Python AST node representing the code to convert.
ctx: An EntityContext object.
nocompile_decorators: A tuple containing decorators to be stripped from
functions during conversion.
Returns:
A tuple (node, deps):
* node: A Python ast node, representing the converted code.
* deps: A set of strings, the fully qualified names of entity
dependencies that this node has.
"""
# TODO(mdan): Verify arguments for correctness.
# TODO(mdan): Factor out common elements.
# These include:
# * code move between blocks
# * visiting blocks in transformers
# Certain steps, especially canonicalization, insert new symbols into the
# tree, which must be accounted. Although less efficient, it is most robust
# to re-run the analysis.
node = _static_analysis_pass(node, ctx)
# Past this point, line numbers are no longer accurate so we ignore the
# source.
# TODO(mdan): Is it feasible to reconstruct intermediate source code?
ctx.source_code = None
node, deps = decorators.transform(node, nocompile_decorators)
node = break_statements.transform(node, ctx)
node = asserts.transform(node, ctx)
# Note: sequencing continue canonicalization before for loop one avoids
# dealing with the extra loop increment operation that the for
# canonicalization creates.
node = continue_statements.transform(node, ctx)
ctx.namespace['len'] = len
node = _static_analysis_pass(node, ctx)
node = for_loops.transform(node, ctx)
# for_loops may insert new global references.
node = builtin_functions.transform(node, ctx)
node = _static_analysis_pass(node, ctx)
node = call_trees.transform(node, ctx, config.DEFAULT_UNCOMPILED_MODULES,
nocompile_decorators)
node = control_flow.transform(node, ctx)
# control_flow may create new symbols and change scopes.
node = _static_analysis_pass(node, ctx)
node = logical_expressions.transform(node)
node = side_effect_guards.transform(node, ctx)
node = name_scopes.transform(node, ctx)
return node, deps
def test_basic_name(self):
def test_fn(l):
a = 5
l += a
return l
node = self.parse_and_analyze(test_fn, {})
node = name_scopes.transform(node, self.ctx)
with self.compiled(node, ops.name_scope) as result:
result_op = result.test_fn(constant_op.constant([1, 2, 3]))
self.assertIn('test_fn/', result_op.op.name)
def test_basic_name(self):
def test_fn(l):
a = 5
l += a
return l
node = self.parse_and_analyze(test_fn, {})
node = name_scopes.transform(node, self.ctx)
with self.compiled(node, ops.name_scope) as result:
result_op = result.test_fn(constant_op.constant([1, 2, 3]))
self.assertIn('test_fn/', result_op.op.name)
def test_nested_name(self):
def test_fn(l):
def body(i):
return i**2
l += [4]
return body(l)
node = self.parse_and_analyze(test_fn, {})
node = name_scopes.transform(node, self.ctx)
with self.compiled(node, ops.name_scope) as result:
result_op = result.test_fn(constant_op.constant([1, 2, 3]))
first_result_input_name = result_op.op.inputs[0].name
second_result_input_name = result_op.op.inputs[1].name
self.assertIn('test_fn/', first_result_input_name)
self.assertNotIn('body/', first_result_input_name)
self.assertIn('test_fn/body/', second_result_input_name)
def test_nested_name(self):
def test_fn(l):
def body(i):
return i**2
l += [4]
return body(l)
node = self.parse_and_analyze(test_fn, {})
node = name_scopes.transform(node, self.ctx)
with self.compiled(node, ops.name_scope) as result:
result_op = result.test_fn(constant_op.constant([1, 2, 3]))
first_result_input_name = result_op.op.inputs[0].name
second_result_input_name = result_op.op.inputs[1].name
self.assertIn('test_fn/', first_result_input_name)
self.assertNotIn('body/', first_result_input_name)
self.assertIn('test_fn/body/', second_result_input_name)
def test_class_name(self):
class TestClass(object):
def test_fn(self, l):
def body(i):
return i**2
l += [4]
return body(l)
# Note that 'TestClass' was needed in the namespace here.
node = self.parse_and_analyze(TestClass, {'TestClass': TestClass},
owner_type=TestClass)
node = name_scopes.transform(node, self.ctx)
with self.compiled(node, ops.name_scope) as result:
result_op = result.TestClass().test_fn(
constant_op.constant([1, 2, 3]))
first_result_input_name = result_op.op.inputs[0].name
second_result_input_name = result_op.op.inputs[1].name
self.assertIn('TestClass/test_fn/', first_result_input_name)
self.assertNotIn('body/', first_result_input_name)
self.assertIn('TestClass/test_fn/body/', second_result_input_name)
def test_class_name(self):
class TestClass(object):
def test_fn(self, l):
def body(i):
return i**2
l += [4]
return body(l)
# Note that 'TestClass' was needed in the namespace here.
node = self.parse_and_analyze(
TestClass, {'TestClass': TestClass}, owner_type=TestClass)
node = name_scopes.transform(node, self.ctx)
with self.compiled(node, ops.name_scope) as result:
result_op = result.TestClass().test_fn(constant_op.constant([1, 2, 3]))
first_result_input_name = result_op.op.inputs[0].name
second_result_input_name = result_op.op.inputs[1].name
self.assertIn('TestClass/test_fn/', first_result_input_name)
self.assertNotIn('body/', first_result_input_name)
self.assertIn('TestClass/test_fn/body/', second_result_input_name)