# Path: dreamer/tools/nested.py
# def zip_(*structures, **kwargs):
# def map_(function, *structures, **kwargs):
#   def impl(function, *structures):
# def flatten_(structure):
# def filter_(predicate, *structures, **kwargs):
#   def impl(predicate, *structures):


import collections
import pathlib
import sys
import tensorflow as tf
from dreamer.tools import nested

  def test_empty(self):
    self.assertEqual({}, nested.filter(lambda x: True, {}))
    self.assertEqual({}, nested.filter(lambda x: False, {}))

  def test_base_case(self):
    self.assertEqual((), nested.filter(lambda x: False, 1))

  def test_single_dict(self):
    predicate = lambda x: x % 2 == 0
    data = {'a': 1, 'b': 2, 'c': 3, 'd': 4}
    self.assertEqual({'b': 2, 'd': 4}, nested.filter(predicate, data))

  def test_multiple_lists(self):
    a = [1, 2, 3]
    b = [4, 5, 6]
    c = [7, 8, 9]
    predicate = lambda *args: any(x % 4 == 0 for x in args)
    result = nested.filter(predicate, a, b, c)
    self.assertEqual([(1, 4, 7), (2, 5, 8)], result)

  def test_multiple_dicts(self):
    a = {'a': 1, 'b': 2, 'c': 3}
    b = {'a': 4, 'b': 5, 'c': 6}
    c = {'a': 7, 'b': 8, 'c': 9}
    predicate = lambda *args: any(x % 4 == 0 for x in args)
    result = nested.filter(predicate, a, b, c)
    self.assertEqual({'a': (1, 4, 7), 'b': (2, 5, 8)}, result)

  def test_mixed_structure(self):

# Path: dreamer/tools/nested.py
# def zip_(*structures, **kwargs):
# def map_(function, *structures, **kwargs):
#   def impl(function, *structures):
# def flatten_(structure):
# def filter_(predicate, *structures, **kwargs):
#   def impl(predicate, *structures):


# Path: tests/test_nested.py
import collections
import pathlib
import sys
import tensorflow as tf
from dreamer.tools import nested


  def test_empty(self):
    self.assertEqual({}, nested.filter(lambda x: True, {}))
    self.assertEqual({}, nested.filter(lambda x: False, {}))

  def test_base_case(self):
    self.assertEqual((), nested.filter(lambda x: False, 1))

  def test_single_dict(self):
    predicate = lambda x: x % 2 == 0
    data = {'a': 1, 'b': 2, 'c': 3, 'd': 4}
    self.assertEqual({'b': 2, 'd': 4}, nested.filter(predicate, data))

  def test_multiple_lists(self):
    a = [1, 2, 3]
    b = [4, 5, 6]
    c = [7, 8, 9]
    predicate = lambda *args: any(x % 4 == 0 for x in args)
    result = nested.filter(predicate, a, b, c)
    self.assertEqual([(1, 4, 7), (2, 5, 8)], result)

  def test_multiple_dicts(self):
    a = {'a': 1, 'b': 2, 'c': 3}
    b = {'a': 4, 'b': 5, 'c': 6}
    c = {'a': 7, 'b': 8, 'c': 9}
    predicate = lambda *args: any(x % 4 == 0 for x in args)
    result = nested.filter(predicate, a, b, c)
    self.assertEqual({'a': (1, 4, 7), 'b': (2, 5, 8)}, result)

  def test_mixed_structure(self):

    predicate = lambda x: x % 2 == 0