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Completed about_dictionaries koan #6
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Original file line number | Diff line number | Diff line change |
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@@ -13,47 +13,47 @@ def test_creating_dictionaries(self): | |
empty_dict = dict() | ||
self.assertEqual(dict, type(empty_dict)) | ||
self.assertEqual(dict(), empty_dict) | ||
self.assertEqual(__, len(empty_dict)) | ||
self.assertEqual(0, len(empty_dict)) | ||
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def test_dictionary_literals(self): | ||
empty_dict = {} | ||
self.assertEqual(dict, type(empty_dict)) | ||
babel_fish = {'one': 'uno', 'two': 'dos'} | ||
self.assertEqual(__, len(babel_fish)) | ||
self.assertEqual(2, len(babel_fish)) | ||
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def test_accessing_dictionaries(self): | ||
babel_fish = {'one': 'uno', 'two': 'dos'} | ||
self.assertEqual(__, babel_fish['one']) | ||
self.assertEqual(__, babel_fish['two']) | ||
self.assertEqual('uno', babel_fish['one']) | ||
self.assertEqual('dos', babel_fish['two']) | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Q2: Can There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Also can. There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. May sound like an Idle question, but |
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def test_changing_dictionaries(self): | ||
babel_fish = {'one': 'uno', 'two': 'dos'} | ||
babel_fish['one'] = 'eins' | ||
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expected = {'two': 'dos', 'one': __} | ||
expected = {'two': 'dos', 'one': "eins"} | ||
self.assertEqual(expected, babel_fish) | ||
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def test_dictionary_is_unordered(self): | ||
dict1 = {'one': 'uno', 'two': 'dos'} | ||
dict2 = {'two': 'dos', 'one': 'uno'} | ||
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self.assertEqual(____, dict1 == dict2) | ||
self.assertEqual(True, dict1 == dict2) | ||
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def test_dictionary_keys_and_values(self): | ||
babel_fish = {'one': 'uno', 'two': 'dos'} | ||
self.assertEqual(__, len(babel_fish.keys())) | ||
self.assertEqual(__, len(babel_fish.values())) | ||
self.assertEqual(__, 'one' in babel_fish.keys()) | ||
self.assertEqual(__, 'two' in babel_fish.values()) | ||
self.assertEqual(__, 'uno' in babel_fish.keys()) | ||
self.assertEqual(__, 'dos' in babel_fish.values()) | ||
self.assertEqual(2, len(babel_fish.keys())) | ||
self.assertEqual(2, len(babel_fish.values())) | ||
self.assertEqual(True, 'one' in babel_fish.keys()) | ||
self.assertEqual(False, 'two' in babel_fish.values()) | ||
self.assertEqual(False, 'uno' in babel_fish.keys()) | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. Q: What type are the return values of There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. It returns |
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self.assertEqual(True, 'dos' in babel_fish.values()) | ||
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def test_making_a_dictionary_from_a_sequence_of_keys(self): | ||
cards = {}.fromkeys( | ||
('red warrior', 'green elf', 'blue valkyrie', 'yellow dwarf', | ||
'confused looking zebra'), | ||
42) | ||
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self.assertEqual(__, len(cards)) | ||
self.assertEqual(__, cards['green elf']) | ||
self.assertEqual(__, cards['yellow dwarf']) | ||
self.assertEqual(5, len(cards)) | ||
self.assertEqual(42, cards['green elf']) | ||
self.assertEqual(42, cards['yellow dwarf']) | ||
There was a problem hiding this comment. Choose a reason for hiding this commentThe reason will be displayed to describe this comment to others. Learn more. nit: line break before end of file. |
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Q1: Can
None
be a valid key?There was a problem hiding this comment.
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Yes, it can.