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 = 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)
# TODO(mdan): Kept for CL consistency. Remove.
# builtin_functions may insert new global references.
ctx.namespace['print'] = print
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)
return node
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 = decorators.transform(node, nocompile_decorators)
node = break_canonicalization.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_canonicalization.transform(node, ctx)
ctx.namespace['len'] = len
node = _static_analysis_pass(node, ctx)
node = for_canonicalization.transform(node, ctx)
# for_canonicalization may insert new global references.
node = builtin_functions.transform(node, ctx)
# builtin_functions may insert new global references.
ctx.namespace['print'] = print
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)
return node
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:
# * keeping track of symbols that have been created
# * marking nodes (e.g. py_func wrappers) to suppress further processing
# * code move between blocks
# * insertion of new global references
# * 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)
node = decorators.transform(node, nocompile_decorators)
node = break_canonicalization.transform(node, ctx.namer)
# Note: sequencing continue canonicalization before for loop one avoids
# dealing with the extra loop increment operation that the for
# canonicalization creates.
node = continue_canonicalization.transform(node, ctx.namer)
ctx.namespace['len'] = len
node = _static_analysis_pass(node, ctx)
node = for_canonicalization.transform(node, ctx.namer)
# for_canonicalization may insert new global references.
node = builtin_functions.transform(node)
# builtin_functions may insert new global references.
ctx.namespace['print'] = print
node = _static_analysis_pass(node, ctx)
node = print_functions.transform(node)
node = call_trees.transform(node, ctx.namer, ctx.namespace,
config.DEFAULT_UNCOMPILED_MODULES,
nocompile_decorators)
node = control_flow.transform(node, ctx.namer)
node = logical_expressions.transform(node)
node = side_effect_guards.transform(node, ctx.namer)
return node
def test_print(self):
def test_fn(a):
print(a)
node = self.parse_and_analyze(test_fn, {'print': print})
node = builtin_functions.transform(node, self.ctx)
result = compiler.ast_to_object(node)
result.test_fn('a')
self.assertTrue(isinstance(node.body[0].body[0].value, gast.Call))
def test_print(self):
def test_fn(a):
print(a)
node = self.parse_and_analyze(test_fn, {'print': print})
node = builtin_functions.transform(node, self.ctx)
result = compiler.ast_to_object(node)
result.test_fn('a')
self.assertTrue(isinstance(node.body[0].body[0].value, gast.Call))
def test_len(self):
def test_fn(a):
return len(a)
node = self.parse_and_analyze(test_fn, {'len': len})
node = builtin_functions.transform(node, self.ctx)
with self.compiled(node, array_ops.shape) as result:
with self.test_session() as sess:
self.assertEqual(
3, sess.run(result.test_fn(constant_op.constant([0, 0,
0]))))
def test_len(self):
def test_fn(a):
return len(a)
node = self.parse_and_analyze(test_fn, {'len': len})
node = builtin_functions.transform(node)
result = compiler.ast_to_object(node)
setattr(result, 'tf', array_ops)
with self.test_session() as sess:
self.assertEqual(
3, sess.run(result.test_fn(constant_op.constant([0, 0, 0]))))
def test_len(self):
def test_fn(a):
return len(a)
node = self.parse_and_analyze(test_fn, {'len': len})
node = builtin_functions.transform(node, self.ctx)
with self.compiled(node, array_ops.shape) as result:
with self.test_session() as sess:
self.assertEqual(3,
sess.run(
result.test_fn(constant_op.constant([0, 0, 0]))))
def test_len(self):
def test_fn(a):
return len(a)
node = self.parse_and_analyze(test_fn, {'len': len})
node = builtin_functions.transform(node, self.ctx)
result = compiler.ast_to_object(node)
setattr(result, 'tf', array_ops)
with self.test_session() as sess:
self.assertEqual(3,
sess.run(
result.test_fn(constant_op.constant([0, 0, 0]))))
def test_print(self):
def test_fn(a):
print(a)
node = self.parse_and_analyze(test_fn, {'print': print})
node = builtin_functions.transform(node, self.ctx)
with self.compiled(node) as result:
try:
out_capturer = six.StringIO()
sys.stdout = out_capturer
result.test_fn('a')
self.assertEqual(out_capturer.getvalue(), 'a\n')
finally:
sys.stdout = sys.__stdout__
def test_print_with_py_func(self):
def test_fn(a, b, c):
print(a, b, c)
node = self.parse_and_analyze(test_fn, {'print': print})
node = builtin_functions.transform(node, self.ctx)
# Note: it's relevant not to include logging_ops.Print here, to verify
# that py_func is used.
with self.compiled(node, script_ops.py_func) as result:
with self.test_session() as sess:
try:
out_capturer = six.StringIO()
sys.stdout = out_capturer
result.test_fn('a', 1, [2, 3])
sess.run(sess.graph.get_operations())
self.assertEqual(out_capturer.getvalue(), 'a 1 [2, 3]\n')
finally:
sys.stdout = sys.__stdout__
def test_print_with_py_func(self):
def test_fn(a, b, c):
print(a, b, c)
node = self.parse_and_analyze(test_fn, {'print': print})
node = builtin_functions.transform(node, self.ctx)
# Note: it's relevant not to include logging_ops.Print here, to verify
# that py_func is used.
with self.compiled(node, script_ops.py_func) as result:
with self.test_session() as sess:
try:
out_capturer = six.StringIO()
sys.stdout = out_capturer
result.test_fn('a', 1, [2, 3])
sess.run(sess.graph.get_operations())
self.assertEqual(out_capturer.getvalue(), 'a 1 [2, 3]\n')
finally:
sys.stdout = sys.__stdout__
def test_print_tuple(self):
def test_fn(a, b, c):
print(a, b, c)
node = self.parse_and_analyze(test_fn, {'print': print})
node = builtin_functions.transform(node, self.ctx)
with self.compiled(node) as result:
try:
out_capturer = six.StringIO()
sys.stdout = out_capturer
result.test_fn('a', 1, [2, 3])
# It appears that the print output looks odd only under Python 2.
if six.PY2:
self.assertEqual(out_capturer.getvalue(), "('a', 1, [2, 3])\n")
else:
self.assertEqual(out_capturer.getvalue(), 'a 1 [2, 3]\n')
finally:
sys.stdout = sys.__stdout__