cpython/Lib/test/test_pprint.py

# -*- coding: utf-8 -*-

import collections
import contextlib
import dataclasses
import io
import itertools
import pprint
import random
import re
import test.support
import types
import unittest

# list, tuple and dict subclasses that do or don't overwrite __repr__
class list2(list):
    pass

class list3(list):
    def __repr__(self):
        return list.__repr__(self)

class list_custom_repr(list):
    def __repr__(self):
        return '*'*len(list.__repr__(self))

class tuple2(tuple):
    pass

class tuple3(tuple):
    def __repr__(self):
        return tuple.__repr__(self)

class tuple_custom_repr(tuple):
    def __repr__(self):
        return '*'*len(tuple.__repr__(self))

class set2(set):
    pass

class set3(set):
    def __repr__(self):
        return set.__repr__(self)

class set_custom_repr(set):
    def __repr__(self):
        return '*'*len(set.__repr__(self))

class frozenset2(frozenset):
    pass

class frozenset3(frozenset):
    def __repr__(self):
        return frozenset.__repr__(self)

class frozenset_custom_repr(frozenset):
    def __repr__(self):
        return '*'*len(frozenset.__repr__(self))

class dict2(dict):
    pass

class dict3(dict):
    def __repr__(self):
        return dict.__repr__(self)

class dict_custom_repr(dict):
    def __repr__(self):
        return '*'*len(dict.__repr__(self))

@dataclasses.dataclass
class dataclass1:
    field1: str
    field2: int
    field3: bool = False
    field4: int = dataclasses.field(default=1, repr=False)

@dataclasses.dataclass
class dataclass2:
    a: int = 1
    def __repr__(self):
        return "custom repr that doesn't fit within pprint width"

@dataclasses.dataclass(repr=False)
class dataclass3:
    a: int = 1

@dataclasses.dataclass
class dataclass4:
    a: "dataclass4"
    b: int = 1

@dataclasses.dataclass
class dataclass5:
    a: "dataclass6"
    b: int = 1

@dataclasses.dataclass
class dataclass6:
    c: "dataclass5"
    d: int = 1

class Unorderable:
    def __repr__(self):
        return str(id(self))

# Class Orderable is orderable with any type
class Orderable:
    def __init__(self, hash):
        self._hash = hash
    def __lt__(self, other):
        return False
    def __gt__(self, other):
        return self != other
    def __le__(self, other):
        return self == other
    def __ge__(self, other):
        return True
    def __eq__(self, other):
        return self is other
    def __ne__(self, other):
        return self is not other
    def __hash__(self):
        return self._hash

class QueryTestCase(unittest.TestCase):

    def setUp(self):
        self.a = list(range(100))
        self.b = list(range(200))
        self.a[-12] = self.b

    def test_init(self):
        pp = pprint.PrettyPrinter()
        pp = pprint.PrettyPrinter(indent=4, width=40, depth=5,
                                  stream=io.StringIO(), compact=True)
        pp = pprint.PrettyPrinter(4, 40, 5, io.StringIO())
        pp = pprint.PrettyPrinter(sort_dicts=False)
        with self.assertRaises(TypeError):
            pp = pprint.PrettyPrinter(4, 40, 5, io.StringIO(), True)
        self.assertRaises(ValueError, pprint.PrettyPrinter, indent=-1)
        self.assertRaises(ValueError, pprint.PrettyPrinter, depth=0)
        self.assertRaises(ValueError, pprint.PrettyPrinter, depth=-1)
        self.assertRaises(ValueError, pprint.PrettyPrinter, width=0)

    def test_basic(self):
        # Verify .isrecursive() and .isreadable() w/o recursion
        pp = pprint.PrettyPrinter()
        for safe in (2, 2.0, 2j, "abc", [3], (2,2), {3: 3}, b"def",
                     bytearray(b"ghi"), True, False, None, ...,
                     self.a, self.b):
            # module-level convenience functions
            self.assertFalse(pprint.isrecursive(safe),
                             "expected not isrecursive for %r" % (safe,))
            self.assertTrue(pprint.isreadable(safe),
                            "expected isreadable for %r" % (safe,))
            # PrettyPrinter methods
            self.assertFalse(pp.isrecursive(safe),
                             "expected not isrecursive for %r" % (safe,))
            self.assertTrue(pp.isreadable(safe),
                            "expected isreadable for %r" % (safe,))

    def test_stdout_is_None(self):
        with contextlib.redirect_stdout(None):
            # smoke test - there is no output to check
            value = 'this should not fail'
            pprint.pprint(value)
            pprint.PrettyPrinter().pprint(value)

    def test_knotted(self):
        # Verify .isrecursive() and .isreadable() w/ recursion
        # Tie a knot.
        self.b[67] = self.a
        # Messy dict.
        self.d = {}
        self.d[0] = self.d[1] = self.d[2] = self.d

        pp = pprint.PrettyPrinter()

        for icky in self.a, self.b, self.d, (self.d, self.d):
            self.assertTrue(pprint.isrecursive(icky), "expected isrecursive")
            self.assertFalse(pprint.isreadable(icky), "expected not isreadable")
            self.assertTrue(pp.isrecursive(icky), "expected isrecursive")
            self.assertFalse(pp.isreadable(icky), "expected not isreadable")

        # Break the cycles.
        self.d.clear()
        del self.a[:]
        del self.b[:]

        for safe in self.a, self.b, self.d, (self.d, self.d):
            # module-level convenience functions
            self.assertFalse(pprint.isrecursive(safe),
                             "expected not isrecursive for %r" % (safe,))
            self.assertTrue(pprint.isreadable(safe),
                            "expected isreadable for %r" % (safe,))
            # PrettyPrinter methods
            self.assertFalse(pp.isrecursive(safe),
                             "expected not isrecursive for %r" % (safe,))
            self.assertTrue(pp.isreadable(safe),
                            "expected isreadable for %r" % (safe,))

    def test_unreadable(self):
        # Not recursive but not readable anyway
        pp = pprint.PrettyPrinter()
        for unreadable in object(), int, pprint, pprint.isrecursive:
            # module-level convenience functions
            self.assertFalse(pprint.isrecursive(unreadable),
                             "expected not isrecursive for %r" % (unreadable,))
            self.assertFalse(pprint.isreadable(unreadable),
                             "expected not isreadable for %r" % (unreadable,))
            # PrettyPrinter methods
            self.assertFalse(pp.isrecursive(unreadable),
                             "expected not isrecursive for %r" % (unreadable,))
            self.assertFalse(pp.isreadable(unreadable),
                             "expected not isreadable for %r" % (unreadable,))

    def test_same_as_repr(self):
        # Simple objects, small containers and classes that override __repr__
        # to directly call super's __repr__.
        # For those the result should be the same as repr().
        # Ahem.  The docs don't say anything about that -- this appears to
        # be testing an implementation quirk.  Starting in Python 2.5, it's
        # not true for dicts:  pprint always sorts dicts by key now; before,
        # it sorted a dict display if and only if the display required
        # multiple lines.  For that reason, dicts with more than one element
        # aren't tested here.
        for simple in (0, 0, 0+0j, 0.0, "", b"", bytearray(),
                       (), tuple2(), tuple3(),
                       [], list2(), list3(),
                       set(), set2(), set3(),
                       frozenset(), frozenset2(), frozenset3(),
                       {}, dict2(), dict3(),
                       self.assertTrue, pprint,
                       -6, -6, -6-6j, -1.5, "x", b"x", bytearray(b"x"),
                       (3,), [3], {3: 6},
                       (1,2), [3,4], {5: 6},
                       tuple2((1,2)), tuple3((1,2)), tuple3(range(100)),
                       [3,4], list2([3,4]), list3([3,4]), list3(range(100)),
                       set({7}), set2({7}), set3({7}),
                       frozenset({8}), frozenset2({8}), frozenset3({8}),
                       dict2({5: 6}), dict3({5: 6}),
                       range(10, -11, -1),
                       True, False, None, ...,
                      ):
            native = repr(simple)
            self.assertEqual(pprint.pformat(simple), native)
            self.assertEqual(pprint.pformat(simple, width=1, indent=0)
                             .replace('\n', ' '), native)
            self.assertEqual(pprint.pformat(simple, underscore_numbers=True), native)
            self.assertEqual(pprint.saferepr(simple), native)

    def test_container_repr_override_called(self):
        N = 1000
        # Ensure that __repr__ override is called for subclasses of containers

        for cont in (list_custom_repr(),
                     list_custom_repr([1,2,3]),
                     list_custom_repr(range(N)),
                     tuple_custom_repr(),
                     tuple_custom_repr([1,2,3]),
                     tuple_custom_repr(range(N)),
                     set_custom_repr(),
                     set_custom_repr([1,2,3]),
                     set_custom_repr(range(N)),
                     frozenset_custom_repr(),
                     frozenset_custom_repr([1,2,3]),
                     frozenset_custom_repr(range(N)),
                     dict_custom_repr(),
                     dict_custom_repr({5: 6}),
                     dict_custom_repr(zip(range(N),range(N))),
                    ):
            native = repr(cont)
            expected = '*' * len(native)
            self.assertEqual(pprint.pformat(cont), expected)
            self.assertEqual(pprint.pformat(cont, width=1, indent=0), expected)
            self.assertEqual(pprint.saferepr(cont), expected)

    def test_basic_line_wrap(self):
        # verify basic line-wrapping operation
        o = {'RPM_cal': 0,
             'RPM_cal2': 48059,
             'Speed_cal': 0,
             'controldesk_runtime_us': 0,
             'main_code_runtime_us': 0,
             'read_io_runtime_us': 0,
             'write_io_runtime_us': 43690}
        exp = """\
{'RPM_cal': 0,
 'RPM_cal2': 48059,
 'Speed_cal': 0,
 'controldesk_runtime_us': 0,
 'main_code_runtime_us': 0,
 'read_io_runtime_us': 0,
 'write_io_runtime_us': 43690}"""
        for type in [dict, dict2]:
            self.assertEqual(pprint.pformat(type(o)), exp)

        o = range(100)
        exp = '[%s]' % ',\n '.join(map(str, o))
        for type in [list, list2]:
            self.assertEqual(pprint.pformat(type(o)), exp)

        o = tuple(range(100))
        exp = '(%s)' % ',\n '.join(map(str, o))
        for type in [tuple, tuple2]:
            self.assertEqual(pprint.pformat(type(o)), exp)

        # indent parameter
        o = range(100)
        exp = '[   %s]' % ',\n    '.join(map(str, o))
        for type in [list, list2]:
            self.assertEqual(pprint.pformat(type(o), indent=4), exp)

    def test_nested_indentations(self):
        o1 = list(range(10))
        o2 = dict(first=1, second=2, third=3)
        o = [o1, o2]
        expected = """\
[   [0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
    {'first': 1, 'second': 2, 'third': 3}]"""
        self.assertEqual(pprint.pformat(o, indent=4, width=42), expected)
        expected = """\
[   [0, 1, 2, 3, 4, 5, 6, 7, 8, 9],
    {   'first': 1,
        'second': 2,
        'third': 3}]"""
        self.assertEqual(pprint.pformat(o, indent=4, width=41), expected)

    def test_width(self):
        expected = """\
[[[[[[1, 2, 3],
     '1 2']]]],
 {1: [1, 2, 3],
  2: [12, 34]},
 'abc def ghi',
 ('ab cd ef',),
 set2({1, 23}),
 [[[[[1, 2, 3],
     '1 2']]]]]"""
        o = eval(expected)
        self.assertEqual(pprint.pformat(o, width=15), expected)
        self.assertEqual(pprint.pformat(o, width=16), expected)
        self.assertEqual(pprint.pformat(o, width=25), expected)
        self.assertEqual(pprint.pformat(o, width=14), """\
[[[[[[1,
      2,
      3],
     '1 '
     '2']]]],
 {1: [1,
      2,
      3],
  2: [12,
      34]},
 'abc def '
 'ghi',
 ('ab cd '
  'ef',),
 set2({1,
       23}),
 [[[[[1,
      2,
      3],
     '1 '
     '2']]]]]""")

    def test_integer(self):
        self.assertEqual(pprint.pformat(1234567), '1234567')
        self.assertEqual(pprint.pformat(1234567, underscore_numbers=True), '1_234_567')

        class Temperature(int):
            def __new__(cls, celsius_degrees):
                return super().__new__(Temperature, celsius_degrees)
            def __repr__(self):
                kelvin_degrees = self + 273.15
                return f"{kelvin_degrees}°K"
        self.assertEqual(pprint.pformat(Temperature(1000)), '1273.15°K')

    def test_sorted_dict(self):
        # Starting in Python 2.5, pprint sorts dict displays by key regardless
        # of how small the dictionary may be.
        # Before the change, on 32-bit Windows pformat() gave order
        # 'a', 'c', 'b' here, so this test failed.
        d = {'a': 1, 'b': 1, 'c': 1}
        self.assertEqual(pprint.pformat(d), "{'a': 1, 'b': 1, 'c': 1}")
        self.assertEqual(pprint.pformat([d, d]),
            "[{'a': 1, 'b': 1, 'c': 1}, {'a': 1, 'b': 1, 'c': 1}]")

        # The next one is kind of goofy.  The sorted order depends on the
        # alphabetic order of type names:  "int" < "str" < "tuple".  Before
        # Python 2.5, this was in the test_same_as_repr() test.  It's worth
        # keeping around for now because it's one of few tests of pprint
        # against a crazy mix of types.
        self.assertEqual(pprint.pformat({"xy\tab\n": (3,), 5: [[]], (): {}}),
            r"{5: [[]], 'xy\tab\n': (3,), (): {}}")

    def test_sort_dict(self):
        d = dict.fromkeys('cba')
        self.assertEqual(pprint.pformat(d, sort_dicts=False), "{'c': None, 'b': None, 'a': None}")
        self.assertEqual(pprint.pformat([d, d], sort_dicts=False),
            "[{'c': None, 'b': None, 'a': None}, {'c': None, 'b': None, 'a': None}]")

    def test_ordered_dict(self):
        d = collections.OrderedDict()
        self.assertEqual(pprint.pformat(d, width=1), 'OrderedDict()')
        d = collections.OrderedDict([])
        self.assertEqual(pprint.pformat(d, width=1), 'OrderedDict()')
        words = 'the quick brown fox jumped over a lazy dog'.split()
        d = collections.OrderedDict(zip(words, itertools.count()))
        self.assertEqual(pprint.pformat(d),
"""\
OrderedDict([('the', 0),
             ('quick', 1),
             ('brown', 2),
             ('fox', 3),
             ('jumped', 4),
             ('over', 5),
             ('a', 6),
             ('lazy', 7),
             ('dog', 8)])""")

    def test_mapping_proxy(self):
        words = 'the quick brown fox jumped over a lazy dog'.split()
        d = dict(zip(words, itertools.count()))
        m = types.MappingProxyType(d)
        self.assertEqual(pprint.pformat(m), """\
mappingproxy({'a': 6,
              'brown': 2,
              'dog': 8,
              'fox': 3,
              'jumped': 4,
              'lazy': 7,
              'over': 5,
              'quick': 1,
              'the': 0})""")
        d = collections.OrderedDict(zip(words, itertools.count()))
        m = types.MappingProxyType(d)
        self.assertEqual(pprint.pformat(m), """\
mappingproxy(OrderedDict([('the', 0),
                          ('quick', 1),
                          ('brown', 2),
                          ('fox', 3),
                          ('jumped', 4),
                          ('over', 5),
                          ('a', 6),
                          ('lazy', 7),
                          ('dog', 8)]))""")

    def test_empty_simple_namespace(self):
        ns = types.SimpleNamespace()
        formatted = pprint.pformat(ns)
        self.assertEqual(formatted, "namespace()")

    def test_small_simple_namespace(self):
        ns = types.SimpleNamespace(a=1, b=2)
        formatted = pprint.pformat(ns)
        self.assertEqual(formatted, "namespace(a=1, b=2)")

    def test_simple_namespace(self):
        ns = types.SimpleNamespace(
            the=0,
            quick=1,
            brown=2,
            fox=3,
            jumped=4,
            over=5,
            a=6,
            lazy=7,
            dog=8,
        )
        formatted = pprint.pformat(ns, width=60, indent=4)
        self.assertEqual(formatted, """\
namespace(the=0,
          quick=1,
          brown=2,
          fox=3,
          jumped=4,
          over=5,
          a=6,
          lazy=7,
          dog=8)""")

    def test_simple_namespace_subclass(self):
        class AdvancedNamespace(types.SimpleNamespace): pass
        ns = AdvancedNamespace(
            the=0,
            quick=1,
            brown=2,
            fox=3,
            jumped=4,
            over=5,
            a=6,
            lazy=7,
            dog=8,
        )
        formatted = pprint.pformat(ns, width=60)
        self.assertEqual(formatted, """\
AdvancedNamespace(the=0,
                  quick=1,
                  brown=2,
                  fox=3,
                  jumped=4,
                  over=5,
                  a=6,
                  lazy=7,
                  dog=8)""")

    def test_empty_dataclass(self):
        dc = dataclasses.make_dataclass("MyDataclass", ())()
        formatted = pprint.pformat(dc)
        self.assertEqual(formatted, "MyDataclass()")

    def test_small_dataclass(self):
        dc = dataclass1("text", 123)
        formatted = pprint.pformat(dc)
        self.assertEqual(formatted, "dataclass1(field1='text', field2=123, field3=False)")

    def test_larger_dataclass(self):
        dc = dataclass1("some fairly long text", int(1e10), True)
        formatted = pprint.pformat([dc, dc], width=60, indent=4)
        self.assertEqual(formatted, """\
[   dataclass1(field1='some fairly long text',
               field2=10000000000,
               field3=True),
    dataclass1(field1='some fairly long text',
               field2=10000000000,
               field3=True)]""")

    def test_dataclass_with_repr(self):
        dc = dataclass2()
        formatted = pprint.pformat(dc, width=20)
        self.assertEqual(formatted, "custom repr that doesn't fit within pprint width")

    def test_dataclass_no_repr(self):
        dc = dataclass3()
        formatted = pprint.pformat(dc, width=10)
        self.assertRegex(
            formatted,
            fr"<{re.escape(__name__)}.dataclass3 object at \w+>",
        )

    def test_recursive_dataclass(self):
        dc = dataclass4(None)
        dc.a = dc
        formatted = pprint.pformat(dc, width=10)
        self.assertEqual(formatted, """\
dataclass4(a=...,
           b=1)""")

    def test_cyclic_dataclass(self):
        dc5 = dataclass5(None)
        dc6 = dataclass6(None)
        dc5.a = dc6
        dc6.c = dc5
        formatted = pprint.pformat(dc5, width=10)
        self.assertEqual(formatted, """\
dataclass5(a=dataclass6(c=...,
                        d=1),
           b=1)""")

    def test_subclassing(self):
        # length(repr(obj)) > width
        o = {'names with spaces': 'should be presented using repr()',
             'others.should.not.be': 'like.this'}
        exp = """\
{'names with spaces': 'should be presented using repr()',
 others.should.not.be: like.this}"""

        dotted_printer = DottedPrettyPrinter()
        self.assertEqual(dotted_printer.pformat(o), exp)

        # length(repr(obj)) < width
        o1 = ['with space']
        exp1 = "['with space']"
        self.assertEqual(dotted_printer.pformat(o1), exp1)
        o2 = ['without.space']
        exp2 = "[without.space]"
        self.assertEqual(dotted_printer.pformat(o2), exp2)

    def test_set_reprs(self):
        self.assertEqual(pprint.pformat(set()), 'set()')
        self.assertEqual(pprint.pformat(set(range(3))), '{0, 1, 2}')
        self.assertEqual(pprint.pformat(set(range(7)), width=20), '''\
{0,
 1,
 2,
 3,
 4,
 5,
 6}''')
        self.assertEqual(pprint.pformat(set2(range(7)), width=20), '''\
set2({0,
      1,
      2,
      3,
      4,
      5,
      6})''')
        self.assertEqual(pprint.pformat(set3(range(7)), width=20),
                         'set3({0, 1, 2, 3, 4, 5, 6})')

        self.assertEqual(pprint.pformat(frozenset()), 'frozenset()')
        self.assertEqual(pprint.pformat(frozenset(range(3))),
                         'frozenset({0, 1, 2})')
        self.assertEqual(pprint.pformat(frozenset(range(7)), width=20), '''\
frozenset({0,
           1,
           2,
           3,
           4,
           5,
           6})''')
        self.assertEqual(pprint.pformat(frozenset2(range(7)), width=20), '''\
frozenset2({0,
            1,
            2,
            3,
            4,
            5,
            6})''')
        self.assertEqual(pprint.pformat(frozenset3(range(7)), width=20),
                         'frozenset3({0, 1, 2, 3, 4, 5, 6})')

    def test_set_of_sets_reprs(self):
        # This test creates a complex arrangement of frozensets and
        # compares the pretty-printed repr against a string hard-coded in
        # the test.  The hard-coded repr depends on the sort order of
        # frozensets.
        #
        # However, as the docs point out: "Since sets only define
        # partial ordering (subset relationships), the output of the
        # list.sort() method is undefined for lists of sets."
        #
        # >>> frozenset({0}) < frozenset({1})
        # False
        # >>> frozenset({1}) < frozenset({0})
        # False
        #
        # In this test we list all possible invariants of the result
        # for unordered frozensets.
        #
        # This test has a long history, see:
        # - https://github.com/python/cpython/commit/969fe57baa0eb80332990f9cda936a33e13fabef
        # - https://github.com/python/cpython/issues/58115
        # - https://github.com/python/cpython/issues/111147

        import textwrap

        # Single-line, always ordered:
        fs0 = frozenset()
        fs1 = frozenset(('abc', 'xyz'))
        data = frozenset((fs0, fs1))
        self.assertEqual(pprint.pformat(data),
                         'frozenset({%r, %r})' % (fs0, fs1))
        self.assertEqual(pprint.pformat(data), repr(data))

        fs2 = frozenset(('one', 'two'))
        data = {fs2: frozenset((fs0, fs1))}
        self.assertEqual(pprint.pformat(data),
                         "{%r: frozenset({%r, %r})}" % (fs2, fs0, fs1))
        self.assertEqual(pprint.pformat(data), repr(data))

        # Single-line, unordered:
        fs1 = frozenset(("xyz", "qwerty"))
        fs2 = frozenset(("abcd", "spam"))
        fs = frozenset((fs1, fs2))
        self.assertEqual(pprint.pformat(fs), repr(fs))

        # Multiline, unordered:
        def check(res, invariants):
            self.assertIn(res, [textwrap.dedent(i).strip() for i in invariants])

        # Inner-most frozensets are singleline, result is multiline, unordered:
        fs1 = frozenset(('regular string', 'other string'))
        fs2 = frozenset(('third string', 'one more string'))
        check(
            pprint.pformat(frozenset((fs1, fs2))),
            [
                """
                frozenset({%r,
                           %r})
                """ % (fs1, fs2),
                """
                frozenset({%r,
                           %r})
                """ % (fs2, fs1),
            ],
        )

        # Everything is multiline, unordered:
        check(
            pprint.pformat(
                frozenset((
                    frozenset((
                        "xyz very-very long string",
                        "qwerty is also absurdly long",
                    )),
                    frozenset((
                        "abcd is even longer that before",
                        "spam is not so long",
                    )),
                )),
            ),
            [
                """
                frozenset({frozenset({'abcd is even longer that before',
                                      'spam is not so long'}),
                           frozenset({'qwerty is also absurdly long',
                                      'xyz very-very long string'})})
                """,

                """
                frozenset({frozenset({'abcd is even longer that before',
                                      'spam is not so long'}),
                           frozenset({'xyz very-very long string',
                                      'qwerty is also absurdly long'})})
                """,

                """
                frozenset({frozenset({'qwerty is also absurdly long',
                                      'xyz very-very long string'}),
                           frozenset({'abcd is even longer that before',
                                      'spam is not so long'})})
                """,

                """
                frozenset({frozenset({'qwerty is also absurdly long',
                                      'xyz very-very long string'}),
                           frozenset({'spam is not so long',
                                      'abcd is even longer that before'})})
                """,
            ],
        )

    def test_depth(self):
        nested_tuple = (1, (2, (3, (4, (5, 6)))))
        nested_dict = {1: {2: {3: {4: {5: {6: 6}}}}}}
        nested_list = [1, [2, [3, [4, [5, [6, []]]]]]]
        self.assertEqual(pprint.pformat(nested_tuple), repr(nested_tuple))
        self.assertEqual(pprint.pformat(nested_dict), repr(nested_dict))
        self.assertEqual(pprint.pformat(nested_list), repr(nested_list))

        lv1_tuple = '(1, (...))'
        lv1_dict = '{1: {...}}'
        lv1_list = '[1, [...]]'
        self.assertEqual(pprint.pformat(nested_tuple, depth=1), lv1_tuple)
        self.assertEqual(pprint.pformat(nested_dict, depth=1), lv1_dict)
        self.assertEqual(pprint.pformat(nested_list, depth=1), lv1_list)

    def test_sort_unorderable_values(self):
        # Issue 3976:  sorted pprints fail for unorderable values.
        n = 20
        keys = [Unorderable() for i in range(n)]
        random.shuffle(keys)
        skeys = sorted(keys, key=id)
        clean = lambda s: s.replace(' ', '').replace('\n','')

        self.assertEqual(clean(pprint.pformat(set(keys))),
            '{' + ','.join(map(repr, skeys)) + '}')
        self.assertEqual(clean(pprint.pformat(frozenset(keys))),
            'frozenset({' + ','.join(map(repr, skeys)) + '})')
        self.assertEqual(clean(pprint.pformat(dict.fromkeys(keys))),
            '{' + ','.join('%r:None' % k for k in skeys) + '}')

        # Issue 10017: TypeError on user-defined types as dict keys.
        self.assertEqual(pprint.pformat({Unorderable: 0, 1: 0}),
                         '{1: 0, ' + repr(Unorderable) +': 0}')

        # Issue 14998: TypeError on tuples with NoneTypes as dict keys.
        keys = [(1,), (None,)]
        self.assertEqual(pprint.pformat(dict.fromkeys(keys, 0)),
                         '{%r: 0, %r: 0}' % tuple(sorted(keys, key=id)))

    def test_sort_orderable_and_unorderable_values(self):
        # Issue 22721:  sorted pprints is not stable
        a = Unorderable()
        b = Orderable(hash(a))  # should have the same hash value
        # self-test
        self.assertLess(a, b)
        self.assertLess(str(type(b)), str(type(a)))
        self.assertEqual(sorted([b, a]), [a, b])
        self.assertEqual(sorted([a, b]), [a, b])
        # set
        self.assertEqual(pprint.pformat(set([b, a]), width=1),
                         '{%r,\n %r}' % (a, b))
        self.assertEqual(pprint.pformat(set([a, b]), width=1),
                         '{%r,\n %r}' % (a, b))
        # dict
        self.assertEqual(pprint.pformat(dict.fromkeys([b, a]), width=1),
                         '{%r: None,\n %r: None}' % (a, b))
        self.assertEqual(pprint.pformat(dict.fromkeys([a, b]), width=1),
                         '{%r: None,\n %r: None}' % (a, b))

    def test_str_wrap(self):
        # pprint tries to wrap strings intelligently
        fox = 'the quick brown fox jumped over a lazy dog'
        self.assertEqual(pprint.pformat(fox, width=19), """\
('the quick brown '
 'fox jumped over '
 'a lazy dog')""")
        self.assertEqual(pprint.pformat({'a': 1, 'b': fox, 'c': 2},
                                        width=25), """\
{'a': 1,
 'b': 'the quick brown '
      'fox jumped over '
      'a lazy dog',
 'c': 2}""")
        # With some special characters
        # - \n always triggers a new line in the pprint
        # - \t and \n are escaped
        # - non-ASCII is allowed
        # - an apostrophe doesn't disrupt the pprint
        special = "Portons dix bons \"whiskys\"\nà l'avocat goujat\t qui fumait au zoo"
        self.assertEqual(pprint.pformat(special, width=68), repr(special))
        self.assertEqual(pprint.pformat(special, width=31), """\
('Portons dix bons "whiskys"\\n'
 "à l'avocat goujat\\t qui "
 'fumait au zoo')""")
        self.assertEqual(pprint.pformat(special, width=20), """\
('Portons dix bons '
 '"whiskys"\\n'
 "à l'avocat "
 'goujat\\t qui '
 'fumait au zoo')""")
        self.assertEqual(pprint.pformat([[[[[special]]]]], width=35), """\
[[[[['Portons dix bons "whiskys"\\n'
     "à l'avocat goujat\\t qui "
     'fumait au zoo']]]]]""")
        self.assertEqual(pprint.pformat([[[[[special]]]]], width=25), """\
[[[[['Portons dix bons '
     '"whiskys"\\n'
     "à l'avocat "
     'goujat\\t qui '
     'fumait au zoo']]]]]""")
        self.assertEqual(pprint.pformat([[[[[special]]]]], width=23), """\
[[[[['Portons dix '
     'bons "whiskys"\\n'
     "à l'avocat "
     'goujat\\t qui '
     'fumait au '
     'zoo']]]]]""")
        # An unwrappable string is formatted as its repr
        unwrappable = "x" * 100
        self.assertEqual(pprint.pformat(unwrappable, width=80), repr(unwrappable))
        self.assertEqual(pprint.pformat(''), "''")
        # Check that the pprint is a usable repr
        special *= 10
        for width in range(3, 40):
            formatted = pprint.pformat(special, width=width)
            self.assertEqual(eval(formatted), special)
            formatted = pprint.pformat([special] * 2, width=width)
            self.assertEqual(eval(formatted), [special] * 2)

    def test_compact(self):
        o = ([list(range(i * i)) for i in range(5)] +
             [list(range(i)) for i in range(6)])
        expected = """\
[[], [0], [0, 1, 2, 3],
 [0, 1, 2, 3, 4, 5, 6, 7, 8],
 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13,
  14, 15],
 [], [0], [0, 1], [0, 1, 2], [0, 1, 2, 3],
 [0, 1, 2, 3, 4]]"""
        self.assertEqual(pprint.pformat(o, width=47, compact=True), expected)

    def test_compact_width(self):
        levels = 20
        number = 10
        o = [0] * number
        for i in range(levels - 1):
            o = [o]
        for w in range(levels * 2 + 1, levels + 3 * number - 1):
            lines = pprint.pformat(o, width=w, compact=True).splitlines()
            maxwidth = max(map(len, lines))
            self.assertLessEqual(maxwidth, w)
            self.assertGreater(maxwidth, w - 3)

    def test_bytes_wrap(self):
        self.assertEqual(pprint.pformat(b'', width=1), "b''")
        self.assertEqual(pprint.pformat(b'abcd', width=1), "b'abcd'")
        letters = b'abcdefghijklmnopqrstuvwxyz'
        self.assertEqual(pprint.pformat(letters, width=29), repr(letters))
        self.assertEqual(pprint.pformat(letters, width=19), """\
(b'abcdefghijkl'
 b'mnopqrstuvwxyz')""")
        self.assertEqual(pprint.pformat(letters, width=18), """\
(b'abcdefghijkl'
 b'mnopqrstuvwx'
 b'yz')""")
        self.assertEqual(pprint.pformat(letters, width=16), """\
(b'abcdefghijkl'
 b'mnopqrstuvwx'
 b'yz')""")
        special = bytes(range(16))
        self.assertEqual(pprint.pformat(special, width=61), repr(special))
        self.assertEqual(pprint.pformat(special, width=48), """\
(b'\\x00\\x01\\x02\\x03\\x04\\x05\\x06\\x07\\x08\\t\\n\\x0b'
 b'\\x0c\\r\\x0e\\x0f')""")
        self.assertEqual(pprint.pformat(special, width=32), """\
(b'\\x00\\x01\\x02\\x03'
 b'\\x04\\x05\\x06\\x07\\x08\\t\\n\\x0b'
 b'\\x0c\\r\\x0e\\x0f')""")
        self.assertEqual(pprint.pformat(special, width=1), """\
(b'\\x00\\x01\\x02\\x03'
 b'\\x04\\x05\\x06\\x07'
 b'\\x08\\t\\n\\x0b'
 b'\\x0c\\r\\x0e\\x0f')""")
        self.assertEqual(pprint.pformat({'a': 1, 'b': letters, 'c': 2},
                                        width=21), """\
{'a': 1,
 'b': b'abcdefghijkl'
      b'mnopqrstuvwx'
      b'yz',
 'c': 2}""")
        self.assertEqual(pprint.pformat({'a': 1, 'b': letters, 'c': 2},
                                        width=20), """\
{'a': 1,
 'b': b'abcdefgh'
      b'ijklmnop'
      b'qrstuvwxyz',
 'c': 2}""")
        self.assertEqual(pprint.pformat([[[[[[letters]]]]]], width=25), """\
[[[[[[b'abcdefghijklmnop'
      b'qrstuvwxyz']]]]]]""")
        self.assertEqual(pprint.pformat([[[[[[special]]]]]], width=41), """\
[[[[[[b'\\x00\\x01\\x02\\x03\\x04\\x05\\x06\\x07'
      b'\\x08\\t\\n\\x0b\\x0c\\r\\x0e\\x0f']]]]]]""")
        # Check that the pprint is a usable repr
        for width in range(1, 64):
            formatted = pprint.pformat(special, width=width)
            self.assertEqual(eval(formatted), special)
            formatted = pprint.pformat([special] * 2, width=width)
            self.assertEqual(eval(formatted), [special] * 2)

    def test_bytearray_wrap(self):
        self.assertEqual(pprint.pformat(bytearray(), width=1), "bytearray(b'')")
        letters = bytearray(b'abcdefghijklmnopqrstuvwxyz')
        self.assertEqual(pprint.pformat(letters, width=40), repr(letters))
        self.assertEqual(pprint.pformat(letters, width=28), """\
bytearray(b'abcdefghijkl'
          b'mnopqrstuvwxyz')""")
        self.assertEqual(pprint.pformat(letters, width=27), """\
bytearray(b'abcdefghijkl'
          b'mnopqrstuvwx'
          b'yz')""")
        self.assertEqual(pprint.pformat(letters, width=25), """\
bytearray(b'abcdefghijkl'
          b'mnopqrstuvwx'
          b'yz')""")
        special = bytearray(range(16))
        self.assertEqual(pprint.pformat(special, width=72), repr(special))
        self.assertEqual(pprint.pformat(special, width=57), """\
bytearray(b'\\x00\\x01\\x02\\x03\\x04\\x05\\x06\\x07\\x08\\t\\n\\x0b'
          b'\\x0c\\r\\x0e\\x0f')""")
        self.assertEqual(pprint.pformat(special, width=41), """\
bytearray(b'\\x00\\x01\\x02\\x03'
          b'\\x04\\x05\\x06\\x07\\x08\\t\\n\\x0b'
          b'\\x0c\\r\\x0e\\x0f')""")
        self.assertEqual(pprint.pformat(special, width=1), """\
bytearray(b'\\x00\\x01\\x02\\x03'
          b'\\x04\\x05\\x06\\x07'
          b'\\x08\\t\\n\\x0b'
          b'\\x0c\\r\\x0e\\x0f')""")
        self.assertEqual(pprint.pformat({'a': 1, 'b': letters, 'c': 2},
                                        width=31), """\
{'a': 1,
 'b': bytearray(b'abcdefghijkl'
                b'mnopqrstuvwx'
                b'yz'),
 'c': 2}""")
        self.assertEqual(pprint.pformat([[[[[letters]]]]], width=37), """\
[[[[[bytearray(b'abcdefghijklmnop'
               b'qrstuvwxyz')]]]]]""")
        self.assertEqual(pprint.pformat([[[[[special]]]]], width=50), """\
[[[[[bytearray(b'\\x00\\x01\\x02\\x03\\x04\\x05\\x06\\x07'
               b'\\x08\\t\\n\\x0b\\x0c\\r\\x0e\\x0f')]]]]]""")

    def test_default_dict(self):
        d = collections.defaultdict(int)
        self.assertEqual(pprint.pformat(d, width=1), "defaultdict(<class 'int'>, {})")
        words = 'the quick brown fox jumped over a lazy dog'.split()
        d = collections.defaultdict(int, zip(words, itertools.count()))
        self.assertEqual(pprint.pformat(d),
"""\
defaultdict(<class 'int'>,
            {'a': 6,
             'brown': 2,
             'dog': 8,
             'fox': 3,
             'jumped': 4,
             'lazy': 7,
             'over': 5,
             'quick': 1,
             'the': 0})""")

    def test_counter(self):
        d = collections.Counter()
        self.assertEqual(pprint.pformat(d, width=1), "Counter()")
        d = collections.Counter('senselessness')
        self.assertEqual(pprint.pformat(d, width=40),
"""\
Counter({'s': 6,
         'e': 4,
         'n': 2,
         'l': 1})""")

    def test_chainmap(self):
        d = collections.ChainMap()
        self.assertEqual(pprint.pformat(d, width=1), "ChainMap({})")
        words = 'the quick brown fox jumped over a lazy dog'.split()
        items = list(zip(words, itertools.count()))
        d = collections.ChainMap(dict(items))
        self.assertEqual(pprint.pformat(d),
"""\
ChainMap({'a': 6,
          'brown': 2,
          'dog': 8,
          'fox': 3,
          'jumped': 4,
          'lazy': 7,
          'over': 5,
          'quick': 1,
          'the': 0})""")
        d = collections.ChainMap(dict(items), collections.OrderedDict(items))
        self.assertEqual(pprint.pformat(d),
"""\
ChainMap({'a': 6,
          'brown': 2,
          'dog': 8,
          'fox': 3,
          'jumped': 4,
          'lazy': 7,
          'over': 5,
          'quick': 1,
          'the': 0},
         OrderedDict([('the', 0),
                      ('quick', 1),
                      ('brown', 2),
                      ('fox', 3),
                      ('jumped', 4),
                      ('over', 5),
                      ('a', 6),
                      ('lazy', 7),
                      ('dog', 8)]))""")

    def test_deque(self):
        d = collections.deque()
        self.assertEqual(pprint.pformat(d, width=1), "deque([])")
        d = collections.deque(maxlen=7)
        self.assertEqual(pprint.pformat(d, width=1), "deque([], maxlen=7)")
        words = 'the quick brown fox jumped over a lazy dog'.split()
        d = collections.deque(zip(words, itertools.count()))
        self.assertEqual(pprint.pformat(d),
"""\
deque([('the', 0),
       ('quick', 1),
       ('brown', 2),
       ('fox', 3),
       ('jumped', 4),
       ('over', 5),
       ('a', 6),
       ('lazy', 7),
       ('dog', 8)])""")
        d = collections.deque(zip(words, itertools.count()), maxlen=7)
        self.assertEqual(pprint.pformat(d),
"""\
deque([('brown', 2),
       ('fox', 3),
       ('jumped', 4),
       ('over', 5),
       ('a', 6),
       ('lazy', 7),
       ('dog', 8)],
      maxlen=7)""")

    def test_user_dict(self):
        d = collections.UserDict()
        self.assertEqual(pprint.pformat(d, width=1), "{}")
        words = 'the quick brown fox jumped over a lazy dog'.split()
        d = collections.UserDict(zip(words, itertools.count()))
        self.assertEqual(pprint.pformat(d),
"""\
{'a': 6,
 'brown': 2,
 'dog': 8,
 'fox': 3,
 'jumped': 4,
 'lazy': 7,
 'over': 5,
 'quick': 1,
 'the': 0}""")

    def test_user_list(self):
        d = collections.UserList()
        self.assertEqual(pprint.pformat(d, width=1), "[]")
        words = 'the quick brown fox jumped over a lazy dog'.split()
        d = collections.UserList(zip(words, itertools.count()))
        self.assertEqual(pprint.pformat(d),
"""\
[('the', 0),
 ('quick', 1),
 ('brown', 2),
 ('fox', 3),
 ('jumped', 4),
 ('over', 5),
 ('a', 6),
 ('lazy', 7),
 ('dog', 8)]""")

    def test_user_string(self):
        d = collections.UserString('')
        self.assertEqual(pprint.pformat(d, width=1), "''")
        d = collections.UserString('the quick brown fox jumped over a lazy dog')
        self.assertEqual(pprint.pformat(d, width=20),
"""\
('the quick brown '
 'fox jumped over '
 'a lazy dog')""")
        self.assertEqual(pprint.pformat({1: d}, width=20),
"""\
{1: 'the quick '
    'brown fox '
    'jumped over a '
    'lazy dog'}""")


class DottedPrettyPrinter(pprint.PrettyPrinter):

    def format(self, object, context, maxlevels, level):
        if isinstance(object, str):
            if ' ' in object:
                return repr(object), 1, 0
            else:
                return object, 0, 0
        else:
            return pprint.PrettyPrinter.format(
                self, object, context, maxlevels, level)


if __name__ == "__main__":
    unittest.main()