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How to use nest method in gabbi

Best Python code snippet using gabbi_python
nest_test.py
Source:nest_test.py
1# Copyright 2016 The TensorFlow Authors. All Rights Reserved.2#3# Licensed under the Apache License, Version 2.0 (the "License");4# you may not use this file except in compliance with the License.5# You may obtain a copy of the License at6#7#     http://www.apache.org/licenses/LICENSE-2.08#9# Unless required by applicable law or agreed to in writing, software10# distributed under the License is distributed on an "AS IS" BASIS,11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.12# See the License for the specific language governing permissions and13# limitations under the License.14# ==============================================================================15"""Tests for utilities working with arbitrarily nested structures."""16from __future__ import absolute_import17from __future__ import division18from __future__ import print_function19import collections20import time21import numpy as np22from six.moves import xrange  # pylint: disable=redefined-builtin23from tensorflow.python.framework import constant_op24from tensorflow.python.framework import dtypes25from tensorflow.python.framework import test_util26from tensorflow.python.ops import array_ops27from tensorflow.python.ops import math_ops28from tensorflow.python.platform import test29from tensorflow.python.util import nest30class NestTest(test.TestCase):31  PointXY = collections.namedtuple("Point", ["x", "y"])  # pylint: disable=invalid-name32  @test_util.assert_no_new_pyobjects_executing_eagerly33  def testFlattenAndPack(self):34    structure = ((3, 4), 5, (6, 7, (9, 10), 8))35    flat = ["a", "b", "c", "d", "e", "f", "g", "h"]36    self.assertEqual(nest.flatten(structure), [3, 4, 5, 6, 7, 9, 10, 8])37    self.assertEqual(38        nest.pack_sequence_as(structure, flat), (("a", "b"), "c",39                                                 ("d", "e", ("f", "g"), "h")))40    structure = (NestTest.PointXY(x=4, y=2),41                 ((NestTest.PointXY(x=1, y=0),),))42    flat = [4, 2, 1, 0]43    self.assertEqual(nest.flatten(structure), flat)44    restructured_from_flat = nest.pack_sequence_as(structure, flat)45    self.assertEqual(restructured_from_flat, structure)46    self.assertEqual(restructured_from_flat[0].x, 4)47    self.assertEqual(restructured_from_flat[0].y, 2)48    self.assertEqual(restructured_from_flat[1][0][0].x, 1)49    self.assertEqual(restructured_from_flat[1][0][0].y, 0)50    self.assertEqual([5], nest.flatten(5))51    self.assertEqual([np.array([5])], nest.flatten(np.array([5])))52    self.assertEqual("a", nest.pack_sequence_as(5, ["a"]))53    self.assertEqual(54        np.array([5]), nest.pack_sequence_as("scalar", [np.array([5])]))55    with self.assertRaisesRegexp(ValueError, "Structure is a scalar"):56      nest.pack_sequence_as("scalar", [4, 5])57    with self.assertRaisesRegexp(TypeError, "flat_sequence"):58      nest.pack_sequence_as([4, 5], "bad_sequence")59    with self.assertRaises(ValueError):60      nest.pack_sequence_as([5, 6, [7, 8]], ["a", "b", "c"])61  @test_util.assert_no_new_pyobjects_executing_eagerly62  def testFlattenDictOrder(self):63    """`flatten` orders dicts by key, including OrderedDicts."""64    ordered = collections.OrderedDict([("d", 3), ("b", 1), ("a", 0), ("c", 2)])65    plain = {"d": 3, "b": 1, "a": 0, "c": 2}66    ordered_flat = nest.flatten(ordered)67    plain_flat = nest.flatten(plain)68    self.assertEqual([0, 1, 2, 3], ordered_flat)69    self.assertEqual([0, 1, 2, 3], plain_flat)70  def testPackDictOrder(self):71    """Packing orders dicts by key, including OrderedDicts."""72    ordered = collections.OrderedDict([("d", 0), ("b", 0), ("a", 0), ("c", 0)])73    plain = {"d": 0, "b": 0, "a": 0, "c": 0}74    seq = [0, 1, 2, 3]75    ordered_reconstruction = nest.pack_sequence_as(ordered, seq)76    plain_reconstruction = nest.pack_sequence_as(plain, seq)77    self.assertEqual(78        collections.OrderedDict([("d", 3), ("b", 1), ("a", 0), ("c", 2)]),79        ordered_reconstruction)80    self.assertEqual({"d": 3, "b": 1, "a": 0, "c": 2}, plain_reconstruction)81  Abc = collections.namedtuple("A", ("b", "c"))  # pylint: disable=invalid-name82  @test_util.assert_no_new_pyobjects_executing_eagerly83  def testFlattenAndPack_withDicts(self):84    # A nice messy mix of tuples, lists, dicts, and `OrderedDict`s.85    mess = [86        "z",87        NestTest.Abc(3, 4),88        {89            "c": [90                1,91                collections.OrderedDict([92                    ("b", 3),93                    ("a", 2),94                ]),95            ],96            "b": 597        },98        1799    ]100    flattened = nest.flatten(mess)101    self.assertEqual(flattened, ["z", 3, 4, 5, 1, 2, 3, 17])102    structure_of_mess = [103        14,104        NestTest.Abc("a", True),105        {106            "c": [107                0,108                collections.OrderedDict([109                    ("b", 9),110                    ("a", 8),111                ]),112            ],113            "b": 3114        },115        "hi everybody",116    ]117    unflattened = nest.pack_sequence_as(structure_of_mess, flattened)118    self.assertEqual(unflattened, mess)119    # Check also that the OrderedDict was created, with the correct key order.120    unflattened_ordered_dict = unflattened[2]["c"][1]121    self.assertIsInstance(unflattened_ordered_dict, collections.OrderedDict)122    self.assertEqual(list(unflattened_ordered_dict.keys()), ["b", "a"])123  def testFlatten_numpyIsNotFlattened(self):124    structure = np.array([1, 2, 3])125    flattened = nest.flatten(structure)126    self.assertEqual(len(flattened), 1)127  def testFlatten_stringIsNotFlattened(self):128    structure = "lots of letters"129    flattened = nest.flatten(structure)130    self.assertEqual(len(flattened), 1)131    unflattened = nest.pack_sequence_as("goodbye", flattened)132    self.assertEqual(structure, unflattened)133  def testPackSequenceAs_notIterableError(self):134    with self.assertRaisesRegexp(TypeError,135                                 "flat_sequence must be a sequence"):136      nest.pack_sequence_as("hi", "bye")137  def testPackSequenceAs_wrongLengthsError(self):138    with self.assertRaisesRegexp(139        ValueError,140        "Structure had 2 elements, but flat_sequence had 3 elements."):141      nest.pack_sequence_as(["hello", "world"],142                            ["and", "goodbye", "again"])143  @test_util.assert_no_new_pyobjects_executing_eagerly144  def testIsSequence(self):145    self.assertFalse(nest.is_sequence("1234"))146    self.assertTrue(nest.is_sequence([1, 3, [4, 5]]))147    self.assertTrue(nest.is_sequence(((7, 8), (5, 6))))148    self.assertTrue(nest.is_sequence([]))149    self.assertTrue(nest.is_sequence({"a": 1, "b": 2}))150    self.assertFalse(nest.is_sequence(set([1, 2])))151    ones = array_ops.ones([2, 3])152    self.assertFalse(nest.is_sequence(ones))153    self.assertFalse(nest.is_sequence(math_ops.tanh(ones)))154    self.assertFalse(nest.is_sequence(np.ones((4, 5))))155  def testFlattenDictItems(self):156    dictionary = {(4, 5, (6, 8)): ("a", "b", ("c", "d"))}157    flat = {4: "a", 5: "b", 6: "c", 8: "d"}158    self.assertEqual(nest.flatten_dict_items(dictionary), flat)159    with self.assertRaises(TypeError):160      nest.flatten_dict_items(4)161    bad_dictionary = {(4, 5, (4, 8)): ("a", "b", ("c", "d"))}162    with self.assertRaisesRegexp(ValueError, "not unique"):163      nest.flatten_dict_items(bad_dictionary)164    another_bad_dictionary = {(4, 5, (6, 8)): ("a", "b", ("c", ("d", "e")))}165    with self.assertRaisesRegexp(166        ValueError, "Key had [0-9]* elements, but value had [0-9]* elements"):167      nest.flatten_dict_items(another_bad_dictionary)168  # pylint does not correctly recognize these as class names and169  # suggests to use variable style under_score naming.170  # pylint: disable=invalid-name171  Named0ab = collections.namedtuple("named_0", ("a", "b"))172  Named1ab = collections.namedtuple("named_1", ("a", "b"))173  SameNameab = collections.namedtuple("same_name", ("a", "b"))174  SameNameab2 = collections.namedtuple("same_name", ("a", "b"))175  SameNamexy = collections.namedtuple("same_name", ("x", "y"))176  SameName1xy = collections.namedtuple("same_name_1", ("x", "y"))177  SameName1xy2 = collections.namedtuple("same_name_1", ("x", "y"))178  NotSameName = collections.namedtuple("not_same_name", ("a", "b"))179  # pylint: enable=invalid-name180  class SameNamedType1(SameNameab):181    pass182  @test_util.assert_no_new_pyobjects_executing_eagerly183  def testAssertSameStructure(self):184    structure1 = (((1, 2), 3), 4, (5, 6))185    structure2 = ((("foo1", "foo2"), "foo3"), "foo4", ("foo5", "foo6"))186    structure_different_num_elements = ("spam", "eggs")187    structure_different_nesting = (((1, 2), 3), 4, 5, (6,))188    nest.assert_same_structure(structure1, structure2)189    nest.assert_same_structure("abc", 1.0)190    nest.assert_same_structure("abc", np.array([0, 1]))191    nest.assert_same_structure("abc", constant_op.constant([0, 1]))192    with self.assertRaisesRegexp(193        ValueError,194        ("The two structures don't have the same nested structure\\.\n\n"195         "First structure:.*?\n\n"196         "Second structure:.*\n\n"197         "More specifically: Substructure "198         r'"type=tuple str=\(\(1, 2\), 3\)" is a sequence, while '199         'substructure "type=str str=spam" is not')):200      nest.assert_same_structure(structure1, structure_different_num_elements)201    with self.assertRaisesRegexp(202        ValueError,203        ("The two structures don't have the same nested structure\\.\n\n"204         "First structure:.*?\n\n"205         "Second structure:.*\n\n"206         r'More specifically: Substructure "type=list str=\[0, 1\]" '207         r'is a sequence, while substructure "type=ndarray str=\[0 1\]" '208         "is not")):209      nest.assert_same_structure([0, 1], np.array([0, 1]))210    with self.assertRaisesRegexp(211        ValueError,212        ("The two structures don't have the same nested structure\\.\n\n"213         "First structure:.*?\n\n"214         "Second structure:.*\n\n"215         r'More specifically: Substructure "type=list str=\[0, 1\]" '216         'is a sequence, while substructure "type=int str=0" '217         "is not")):218      nest.assert_same_structure(0, [0, 1])219    self.assertRaises(TypeError, nest.assert_same_structure, (0, 1), [0, 1])220    with self.assertRaisesRegexp(221        ValueError,222        ("don't have the same nested structure\\.\n\n"223         "First structure: .*?\n\nSecond structure: ")):224      nest.assert_same_structure(structure1, structure_different_nesting)225    self.assertRaises(TypeError, nest.assert_same_structure, (0, 1),226                      NestTest.Named0ab("a", "b"))227    nest.assert_same_structure(NestTest.Named0ab(3, 4),228                               NestTest.Named0ab("a", "b"))229    self.assertRaises(TypeError, nest.assert_same_structure,230                      NestTest.Named0ab(3, 4), NestTest.Named1ab(3, 4))231    with self.assertRaisesRegexp(232        ValueError,233        ("don't have the same nested structure\\.\n\n"234         "First structure: .*?\n\nSecond structure: ")):235      nest.assert_same_structure(NestTest.Named0ab(3, 4),236                                 NestTest.Named0ab([3], 4))237    with self.assertRaisesRegexp(238        ValueError,239        ("don't have the same nested structure\\.\n\n"240         "First structure: .*?\n\nSecond structure: ")):241      nest.assert_same_structure([[3], 4], [3, [4]])242    structure1_list = [[[1, 2], 3], 4, [5, 6]]243    with self.assertRaisesRegexp(TypeError,244                                 "don't have the same sequence type"):245      nest.assert_same_structure(structure1, structure1_list)246    nest.assert_same_structure(structure1, structure2, check_types=False)247    nest.assert_same_structure(structure1, structure1_list, check_types=False)248    with self.assertRaisesRegexp(ValueError,249                                 "don't have the same set of keys"):250      nest.assert_same_structure({"a": 1}, {"b": 1})251    nest.assert_same_structure(NestTest.SameNameab(0, 1),252                               NestTest.SameNameab2(2, 3))253    # This assertion is expected to pass: two namedtuples with the same254    # name and field names are considered to be identical.255    nest.assert_same_structure(256        NestTest.SameNameab(NestTest.SameName1xy(0, 1), 2),257        NestTest.SameNameab2(NestTest.SameName1xy2(2, 3), 4))258    expected_message = "The two structures don't have the same.*"259    with self.assertRaisesRegexp(ValueError, expected_message):260      nest.assert_same_structure(261          NestTest.SameNameab(0, NestTest.SameNameab2(1, 2)),262          NestTest.SameNameab2(NestTest.SameNameab(0, 1), 2))263    self.assertRaises(TypeError, nest.assert_same_structure,264                      NestTest.SameNameab(0, 1), NestTest.NotSameName(2, 3))265    self.assertRaises(TypeError, nest.assert_same_structure,266                      NestTest.SameNameab(0, 1), NestTest.SameNamexy(2, 3))267    self.assertRaises(TypeError, nest.assert_same_structure,268                      NestTest.SameNameab(0, 1), NestTest.SameNamedType1(2, 3))269  EmptyNT = collections.namedtuple("empty_nt", "")  # pylint: disable=invalid-name270  @test_util.assert_no_new_pyobjects_executing_eagerly271  def testMapStructure(self):272    structure1 = (((1, 2), 3), 4, (5, 6))273    structure2 = (((7, 8), 9), 10, (11, 12))274    structure1_plus1 = nest.map_structure(lambda x: x + 1, structure1)275    nest.assert_same_structure(structure1, structure1_plus1)276    self.assertAllEqual(277        [2, 3, 4, 5, 6, 7],278        nest.flatten(structure1_plus1))279    structure1_plus_structure2 = nest.map_structure(280        lambda x, y: x + y, structure1, structure2)281    self.assertEqual(282        (((1 + 7, 2 + 8), 3 + 9), 4 + 10, (5 + 11, 6 + 12)),283        structure1_plus_structure2)284    self.assertEqual(3, nest.map_structure(lambda x: x - 1, 4))285    self.assertEqual(7, nest.map_structure(lambda x, y: x + y, 3, 4))286    # Empty structures287    self.assertEqual((), nest.map_structure(lambda x: x + 1, ()))288    self.assertEqual([], nest.map_structure(lambda x: x + 1, []))289    self.assertEqual({}, nest.map_structure(lambda x: x + 1, {}))290    self.assertEqual(NestTest.EmptyNT(), nest.map_structure(lambda x: x + 1,291                                                            NestTest.EmptyNT()))292    # This is checking actual equality of types, empty list != empty tuple293    self.assertNotEqual((), nest.map_structure(lambda x: x + 1, []))294    with self.assertRaisesRegexp(TypeError, "callable"):295      nest.map_structure("bad", structure1_plus1)296    with self.assertRaisesRegexp(ValueError, "at least one structure"):297      nest.map_structure(lambda x: x)298    with self.assertRaisesRegexp(ValueError, "same number of elements"):299      nest.map_structure(lambda x, y: None, (3, 4), (3, 4, 5))300    with self.assertRaisesRegexp(ValueError, "same nested structure"):301      nest.map_structure(lambda x, y: None, 3, (3,))302    with self.assertRaisesRegexp(TypeError, "same sequence type"):303      nest.map_structure(lambda x, y: None, ((3, 4), 5), [(3, 4), 5])304    with self.assertRaisesRegexp(ValueError, "same nested structure"):305      nest.map_structure(lambda x, y: None, ((3, 4), 5), (3, (4, 5)))306    structure1_list = [[[1, 2], 3], 4, [5, 6]]307    with self.assertRaisesRegexp(TypeError, "same sequence type"):308      nest.map_structure(lambda x, y: None, structure1, structure1_list)309    nest.map_structure(lambda x, y: None, structure1, structure1_list,310                       check_types=False)311    with self.assertRaisesRegexp(ValueError, "same nested structure"):312      nest.map_structure(lambda x, y: None, ((3, 4), 5), (3, (4, 5)),313                         check_types=False)314    with self.assertRaisesRegexp(ValueError, "Only valid keyword argument"):315      nest.map_structure(lambda x: None, structure1, foo="a")316    with self.assertRaisesRegexp(ValueError, "Only valid keyword argument"):317      nest.map_structure(lambda x: None, structure1, check_types=False, foo="a")318  ABTuple = collections.namedtuple("ab_tuple", "a, b")  # pylint: disable=invalid-name319  @test_util.assert_no_new_pyobjects_executing_eagerly320  def testMapStructureWithStrings(self):321    inp_a = NestTest.ABTuple(a="foo", b=("bar", "baz"))322    inp_b = NestTest.ABTuple(a=2, b=(1, 3))323    out = nest.map_structure(lambda string, repeats: string * repeats,324                             inp_a,325                             inp_b)326    self.assertEqual("foofoo", out.a)327    self.assertEqual("bar", out.b[0])328    self.assertEqual("bazbazbaz", out.b[1])329    nt = NestTest.ABTuple(a=("something", "something_else"),330                          b="yet another thing")331    rev_nt = nest.map_structure(lambda x: x[::-1], nt)332    # Check the output is the correct structure, and all strings are reversed.333    nest.assert_same_structure(nt, rev_nt)334    self.assertEqual(nt.a[0][::-1], rev_nt.a[0])335    self.assertEqual(nt.a[1][::-1], rev_nt.a[1])336    self.assertEqual(nt.b[::-1], rev_nt.b)337  def testMapStructureOverPlaceholders(self):338    inp_a = (array_ops.placeholder(dtypes.float32, shape=[3, 4]),339             array_ops.placeholder(dtypes.float32, shape=[3, 7]))340    inp_b = (array_ops.placeholder(dtypes.float32, shape=[3, 4]),341             array_ops.placeholder(dtypes.float32, shape=[3, 7]))342    output = nest.map_structure(lambda x1, x2: x1 + x2, inp_a, inp_b)343    nest.assert_same_structure(output, inp_a)344    self.assertShapeEqual(np.zeros((3, 4)), output[0])345    self.assertShapeEqual(np.zeros((3, 7)), output[1])346    feed_dict = {347        inp_a: (np.random.randn(3, 4), np.random.randn(3, 7)),348        inp_b: (np.random.randn(3, 4), np.random.randn(3, 7))349    }350    with self.test_session() as sess:351      output_np = sess.run(output, feed_dict=feed_dict)352    self.assertAllClose(output_np[0],353                        feed_dict[inp_a][0] + feed_dict[inp_b][0])354    self.assertAllClose(output_np[1],355                        feed_dict[inp_a][1] + feed_dict[inp_b][1])356  def testAssertShallowStructure(self):357    inp_ab = ["a", "b"]358    inp_abc = ["a", "b", "c"]359    expected_message = (360        "The two structures don't have the same sequence length. Input "361        "structure has length 2, while shallow structure has length 3.")362    with self.assertRaisesRegexp(ValueError, expected_message):363      nest.assert_shallow_structure(inp_abc, inp_ab)364    inp_ab1 = [(1, 1), (2, 2)]365    inp_ab2 = [[1, 1], [2, 2]]366    expected_message = (367        "The two structures don't have the same sequence type. Input structure "368        "has type <(type|class) 'tuple'>, while shallow structure has type "369        "<(type|class) 'list'>.")370    with self.assertRaisesRegexp(TypeError, expected_message):371      nest.assert_shallow_structure(inp_ab2, inp_ab1)372    nest.assert_shallow_structure(inp_ab2, inp_ab1, check_types=False)373    inp_ab1 = {"a": (1, 1), "b": {"c": (2, 2)}}374    inp_ab2 = {"a": (1, 1), "b": {"d": (2, 2)}}375    expected_message = (376        r"The two structures don't have the same keys. Input "377        r"structure has keys \['c'\], while shallow structure has "378        r"keys \['d'\].")379    with self.assertRaisesRegexp(ValueError, expected_message):380      nest.assert_shallow_structure(inp_ab2, inp_ab1)381    inp_ab = collections.OrderedDict([("a", 1), ("b", (2, 3))])382    inp_ba = collections.OrderedDict([("b", (2, 3)), ("a", 1)])383    nest.assert_shallow_structure(inp_ab, inp_ba)384    # This assertion is expected to pass: two namedtuples with the same385    # name and field names are considered to be identical.386    inp_shallow = NestTest.SameNameab(1, 2)387    inp_deep = NestTest.SameNameab2(1, [1, 2, 3])388    nest.assert_shallow_structure(inp_shallow, inp_deep, check_types=False)389    nest.assert_shallow_structure(inp_shallow, inp_deep, check_types=True)390  def testFlattenUpTo(self):391    # Shallow tree ends at scalar.392    input_tree = [[[2, 2], [3, 3]], [[4, 9], [5, 5]]]393    shallow_tree = [[True, True], [False, True]]394    flattened_input_tree = nest.flatten_up_to(shallow_tree, input_tree)395    flattened_shallow_tree = nest.flatten_up_to(shallow_tree, shallow_tree)396    self.assertEqual(flattened_input_tree, [[2, 2], [3, 3], [4, 9], [5, 5]])397    self.assertEqual(flattened_shallow_tree, [True, True, False, True])398    # Shallow tree ends at string.399    input_tree = [[("a", 1), [("b", 2), [("c", 3), [("d", 4)]]]]]400    shallow_tree = [["level_1", ["level_2", ["level_3", ["level_4"]]]]]401    input_tree_flattened_as_shallow_tree = nest.flatten_up_to(shallow_tree,402                                                              input_tree)403    input_tree_flattened = nest.flatten(input_tree)404    self.assertEqual(input_tree_flattened_as_shallow_tree,405                     [("a", 1), ("b", 2), ("c", 3), ("d", 4)])406    self.assertEqual(input_tree_flattened, ["a", 1, "b", 2, "c", 3, "d", 4])407    # Make sure dicts are correctly flattened, yielding values, not keys.408    input_tree = {"a": 1, "b": {"c": 2}, "d": [3, (4, 5)]}409    shallow_tree = {"a": 0, "b": 0, "d": [0, 0]}410    input_tree_flattened_as_shallow_tree = nest.flatten_up_to(shallow_tree,411                                                              input_tree)412    self.assertEqual(input_tree_flattened_as_shallow_tree,413                     [1, {"c": 2}, 3, (4, 5)])414    # Namedtuples.415    ab_tuple = NestTest.ABTuple416    input_tree = ab_tuple(a=[0, 1], b=2)417    shallow_tree = ab_tuple(a=0, b=1)418    input_tree_flattened_as_shallow_tree = nest.flatten_up_to(shallow_tree,419                                                              input_tree)420    self.assertEqual(input_tree_flattened_as_shallow_tree,421                     [[0, 1], 2])422    # Nested dicts, OrderedDicts and namedtuples.423    input_tree = collections.OrderedDict(424        [("a", ab_tuple(a=[0, {"b": 1}], b=2)),425         ("c", {"d": 3, "e": collections.OrderedDict([("f", 4)])})])426    shallow_tree = input_tree427    input_tree_flattened_as_shallow_tree = nest.flatten_up_to(shallow_tree,428                                                              input_tree)429    self.assertEqual(input_tree_flattened_as_shallow_tree, [0, 1, 2, 3, 4])430    shallow_tree = collections.OrderedDict([("a", 0), ("c", {"d": 3, "e": 1})])431    input_tree_flattened_as_shallow_tree = nest.flatten_up_to(shallow_tree,432                                                              input_tree)433    self.assertEqual(input_tree_flattened_as_shallow_tree,434                     [ab_tuple(a=[0, {"b": 1}], b=2),435                      3,436                      collections.OrderedDict([("f", 4)])])437    shallow_tree = collections.OrderedDict([("a", 0), ("c", 0)])438    input_tree_flattened_as_shallow_tree = nest.flatten_up_to(shallow_tree,439                                                              input_tree)440    self.assertEqual(input_tree_flattened_as_shallow_tree,441                     [ab_tuple(a=[0, {"b": 1}], b=2),442                      {"d": 3, "e": collections.OrderedDict([("f", 4)])}])443    ## Shallow non-list edge-case.444    # Using iterable elements.445    input_tree = ["input_tree"]446    shallow_tree = "shallow_tree"447    flattened_input_tree = nest.flatten_up_to(shallow_tree, input_tree)448    flattened_shallow_tree = nest.flatten_up_to(shallow_tree, shallow_tree)449    self.assertEqual(flattened_input_tree, [input_tree])450    self.assertEqual(flattened_shallow_tree, [shallow_tree])451    input_tree = ["input_tree_0", "input_tree_1"]452    shallow_tree = "shallow_tree"453    flattened_input_tree = nest.flatten_up_to(shallow_tree, input_tree)454    flattened_shallow_tree = nest.flatten_up_to(shallow_tree, shallow_tree)455    self.assertEqual(flattened_input_tree, [input_tree])456    self.assertEqual(flattened_shallow_tree, [shallow_tree])457    # Using non-iterable elements.458    input_tree = [0]459    shallow_tree = 9460    flattened_input_tree = nest.flatten_up_to(shallow_tree, input_tree)461    flattened_shallow_tree = nest.flatten_up_to(shallow_tree, shallow_tree)462    self.assertEqual(flattened_input_tree, [input_tree])463    self.assertEqual(flattened_shallow_tree, [shallow_tree])464    input_tree = [0, 1]465    shallow_tree = 9466    flattened_input_tree = nest.flatten_up_to(shallow_tree, input_tree)467    flattened_shallow_tree = nest.flatten_up_to(shallow_tree, shallow_tree)468    self.assertEqual(flattened_input_tree, [input_tree])469    self.assertEqual(flattened_shallow_tree, [shallow_tree])470    ## Both non-list edge-case.471    # Using iterable elements.472    input_tree = "input_tree"473    shallow_tree = "shallow_tree"474    flattened_input_tree = nest.flatten_up_to(shallow_tree, input_tree)475    flattened_shallow_tree = nest.flatten_up_to(shallow_tree, shallow_tree)476    self.assertEqual(flattened_input_tree, [input_tree])477    self.assertEqual(flattened_shallow_tree, [shallow_tree])478    # Using non-iterable elements.479    input_tree = 0480    shallow_tree = 0481    flattened_input_tree = nest.flatten_up_to(shallow_tree, input_tree)482    flattened_shallow_tree = nest.flatten_up_to(shallow_tree, shallow_tree)483    self.assertEqual(flattened_input_tree, [input_tree])484    self.assertEqual(flattened_shallow_tree, [shallow_tree])485    ## Input non-list edge-case.486    # Using iterable elements.487    input_tree = "input_tree"488    shallow_tree = ["shallow_tree"]489    expected_message = ("If shallow structure is a sequence, input must also "490                        "be a sequence. Input has type: <(type|class) 'str'>.")491    with self.assertRaisesRegexp(TypeError, expected_message):492      flattened_input_tree = nest.flatten_up_to(shallow_tree, input_tree)493    flattened_shallow_tree = nest.flatten_up_to(shallow_tree, shallow_tree)494    self.assertEqual(flattened_shallow_tree, shallow_tree)495    input_tree = "input_tree"496    shallow_tree = ["shallow_tree_9", "shallow_tree_8"]497    with self.assertRaisesRegexp(TypeError, expected_message):498      flattened_input_tree = nest.flatten_up_to(shallow_tree, input_tree)499    flattened_shallow_tree = nest.flatten_up_to(shallow_tree, shallow_tree)500    self.assertEqual(flattened_shallow_tree, shallow_tree)501    # Using non-iterable elements.502    input_tree = 0503    shallow_tree = [9]504    expected_message = ("If shallow structure is a sequence, input must also "505                        "be a sequence. Input has type: <(type|class) 'int'>.")506    with self.assertRaisesRegexp(TypeError, expected_message):507      flattened_input_tree = nest.flatten_up_to(shallow_tree, input_tree)508    flattened_shallow_tree = nest.flatten_up_to(shallow_tree, shallow_tree)509    self.assertEqual(flattened_shallow_tree, shallow_tree)510    input_tree = 0511    shallow_tree = [9, 8]512    with self.assertRaisesRegexp(TypeError, expected_message):513      flattened_input_tree = nest.flatten_up_to(shallow_tree, input_tree)514    flattened_shallow_tree = nest.flatten_up_to(shallow_tree, shallow_tree)515    self.assertEqual(flattened_shallow_tree, shallow_tree)516  def testMapStructureUpTo(self):517    # Named tuples.518    ab_tuple = collections.namedtuple("ab_tuple", "a, b")519    op_tuple = collections.namedtuple("op_tuple", "add, mul")520    inp_val = ab_tuple(a=2, b=3)521    inp_ops = ab_tuple(a=op_tuple(add=1, mul=2), b=op_tuple(add=2, mul=3))522    out = nest.map_structure_up_to(523        inp_val, lambda val, ops: (val + ops.add) * ops.mul, inp_val, inp_ops)524    self.assertEqual(out.a, 6)525    self.assertEqual(out.b, 15)526    # Lists.527    data_list = [[2, 4, 6, 8], [[1, 3, 5, 7, 9], [3, 5, 7]]]528    name_list = ["evens", ["odds", "primes"]]529    out = nest.map_structure_up_to(530        name_list, lambda name, sec: "first_{}_{}".format(len(sec), name),531        name_list, data_list)532    self.assertEqual(out, ["first_4_evens", ["first_5_odds", "first_3_primes"]])533  def testGetTraverseShallowStructure(self):534    scalar_traverse_input = [3, 4, (1, 2, [0]), [5, 6], {"a": (7,)}, []]535    scalar_traverse_r = nest.get_traverse_shallow_structure(536        lambda s: not isinstance(s, tuple),537        scalar_traverse_input)538    self.assertEqual(scalar_traverse_r,539                     [True, True, False, [True, True], {"a": False}, []])540    nest.assert_shallow_structure(scalar_traverse_r,541                                  scalar_traverse_input)542    structure_traverse_input = [(1, [2]), ([1], 2)]543    structure_traverse_r = nest.get_traverse_shallow_structure(544        lambda s: (True, False) if isinstance(s, tuple) else True,545        structure_traverse_input)546    self.assertEqual(structure_traverse_r,547                     [(True, False), ([True], False)])548    nest.assert_shallow_structure(structure_traverse_r,549                                  structure_traverse_input)550    with self.assertRaisesRegexp(TypeError, "returned structure"):551      nest.get_traverse_shallow_structure(lambda _: [True], 0)552    with self.assertRaisesRegexp(TypeError, "returned a non-bool scalar"):553      nest.get_traverse_shallow_structure(lambda _: 1, [1])554    with self.assertRaisesRegexp(555        TypeError, "didn't return a depth=1 structure of bools"):556      nest.get_traverse_shallow_structure(lambda _: [1], [1])557  def testYieldFlatStringPaths(self):558    for inputs_expected in ({"inputs": [], "expected": []},559                            {"inputs": 3, "expected": [()]},560                            {"inputs": [3], "expected": [(0,)]},561                            {"inputs": {"a": 3}, "expected": [("a",)]},562                            {"inputs": {"a": {"b": 4}},563                             "expected": [("a", "b")]},564                            {"inputs": [{"a": 2}], "expected": [(0, "a")]},565                            {"inputs": [{"a": [2]}], "expected": [(0, "a", 0)]},566                            {"inputs": [{"a": [(23, 42)]}],567                             "expected": [(0, "a", 0, 0), (0, "a", 0, 1)]},568                            {"inputs": [{"a": ([23], 42)}],569                             "expected": [(0, "a", 0, 0), (0, "a", 1)]},570                            {"inputs": {"a": {"a": 2}, "c": [[[4]]]},571                             "expected": [("a", "a"), ("c", 0, 0, 0)]},572                            {"inputs": {"0": [{"1": 23}]},573                             "expected": [("0", 0, "1")]}):574      inputs = inputs_expected["inputs"]575      expected = inputs_expected["expected"]576      self.assertEqual(list(nest.yield_flat_paths(inputs)), expected)577  def testFlattenWithStringPaths(self):578    for inputs_expected in (579        {"inputs": [], "expected": []},580        {"inputs": [23, "42"], "expected": [("0", 23), ("1", "42")]},581        {"inputs": [[[[108]]]], "expected": [("0/0/0/0", 108)]}):582      inputs = inputs_expected["inputs"]583      expected = inputs_expected["expected"]584      self.assertEqual(585          nest.flatten_with_joined_string_paths(inputs, separator="/"),586          expected)587  # Need a separate test for namedtuple as we can't declare tuple definitions588  # in the @parameterized arguments.589  def testFlattenNamedTuple(self):590    # pylint: disable=invalid-name591    Foo = collections.namedtuple("Foo", ["a", "b"])592    Bar = collections.namedtuple("Bar", ["c", "d"])593    # pylint: enable=invalid-name594    test_cases = [595        (Foo(a=3, b=Bar(c=23, d=42)),596         [("a", 3), ("b/c", 23), ("b/d", 42)]),597        (Foo(a=Bar(c=23, d=42), b=Bar(c=0, d="something")),598         [("a/c", 23), ("a/d", 42), ("b/c", 0), ("b/d", "something")]),599        (Bar(c=42, d=43),600         [("c", 42), ("d", 43)]),601        (Bar(c=[42], d=43),602         [("c/0", 42), ("d", 43)]),603    ]604    for inputs, expected in test_cases:605      self.assertEqual(606          list(nest.flatten_with_joined_string_paths(inputs)), expected)607class NestBenchmark(test.Benchmark):608  def run_and_report(self, s1, s2, name):609    burn_iter, test_iter = 100, 30000610    for _ in xrange(burn_iter):611      nest.assert_same_structure(s1, s2)612    t0 = time.time()613    for _ in xrange(test_iter):614      nest.assert_same_structure(s1, s2)615    t1 = time.time()616    self.report_benchmark(iters=test_iter, wall_time=(t1 - t0) / test_iter,617                          name=name)618  def benchmark_assert_structure(self):619    s1 = (((1, 2), 3), 4, (5, 6))620    s2 = ((("foo1", "foo2"), "foo3"), "foo4", ("foo5", "foo6"))621    self.run_and_report(s1, s2, "assert_same_structure_6_elem")622    s1 = (((1, 2), 3), 4, (5, 6)) * 10623    s2 = ((("foo1", "foo2"), "foo3"), "foo4", ("foo5", "foo6")) * 10624    self.run_and_report(s1, s2, "assert_same_structure_60_elem")625if __name__ == "__main__":...
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