diff --git a/src/past/builtins/misc.py b/src/past/builtins/misc.py index ba50aa9e..3600695c 100644 --- a/src/past/builtins/misc.py +++ b/src/past/builtins/misc.py @@ -1,6 +1,8 @@ from __future__ import unicode_literals import inspect +import math +import numbers from future.utils import PY2, PY3, exec_ @@ -29,8 +31,67 @@ def cmp(x, y): cmp(x, y) -> integer Return negative if xy. + Python2 had looser comparison allowing cmp None and non Numerical types and collections. + Try to match the old behavior """ - return (x > y) - (x < y) + if isinstance(x, set) and isinstance(y, set): + raise TypeError('cannot compare sets using cmp()',) + try: + if isinstance(x, numbers.Number) and math.isnan(x): + if not isinstance(y, numbers.Number): + raise TypeError('cannot compare float("nan"), {type_y} with cmp'.format(type_y=type(y))) + if isinstance(y, int): + return 1 + else: + return -1 + if isinstance(y, numbers.Number) and math.isnan(y): + if not isinstance(x, numbers.Number): + raise TypeError('cannot compare {type_x}, float("nan") with cmp'.format(type_x=type(x))) + if isinstance(x, int): + return -1 + else: + return 1 + return (x > y) - (x < y) + except TypeError: + if x == y: + return 0 + type_order = [ + type(None), + numbers.Number, + dict, list, + set, + (str, bytes), + ] + x_type_index = y_type_index = None + for i, type_match in enumerate(type_order): + if isinstance(x, type_match): + x_type_index = i + if isinstance(y, type_match): + y_type_index = i + if cmp(x_type_index, y_type_index) == 0: + if isinstance(x, bytes) and isinstance(y, str): + return cmp(x.decode('ascii'), y) + if isinstance(y, bytes) and isinstance(x, str): + return cmp(x, y.decode('ascii')) + elif isinstance(x, list): + # if both arguments are lists take the comparison of the first non equal value + for x_elem, y_elem in zip(x, y): + elem_cmp_val = cmp(x_elem, y_elem) + if elem_cmp_val != 0: + return elem_cmp_val + # if all elements are equal, return equal/0 + return 0 + elif isinstance(x, dict): + if len(x) != len(y): + return cmp(len(x), len(y)) + else: + x_key = min(a for a in x if a not in y or x[a] != y[a]) + y_key = min(b for b in y if b not in x or x[b] != y[b]) + if x_key != y_key: + return cmp(x_key, y_key) + else: + return cmp(x[x_key], y[y_key]) + return cmp(x_type_index, y_type_index) from sys import intern @@ -42,7 +103,13 @@ def oct(number): return '0' + builtins.oct(number)[2:] raw_input = input - from imp import reload + + try: + from importlib import reload + except ImportError: + # for python2, python3 <= 3.4 + from imp import reload + unicode = str unichr = chr xrange = range @@ -82,7 +149,7 @@ def execfile(filename, myglobals=None, mylocals=None): if not isinstance(mylocals, Mapping): raise TypeError('locals must be a mapping') with open(filename, "rb") as fin: - source = fin.read() + source = fin.read() code = compile(source, filename, "exec") exec_(code, myglobals, mylocals) diff --git a/tests/test_past/test_misc.py b/tests/test_past/test_misc.py new file mode 100644 index 00000000..0367b3db --- /dev/null +++ b/tests/test_past/test_misc.py @@ -0,0 +1,53 @@ +# -*- coding: utf-8 -*- +""" +Tests for the resurrected Py2-like cmp function +""" + +from __future__ import absolute_import, unicode_literals, print_function + +import os.path +import sys +import traceback +from contextlib import contextmanager + +from future.tests.base import unittest +from future.utils import PY3, PY26 + +if PY3: + from past.builtins import cmp + +_dir = os.path.dirname(os.path.abspath(__file__)) +sys.path.append(_dir) +import test_values + + +@contextmanager +def empty_context_manager(*args, **kwargs): + yield dict(args=args, kwargs=kwargs) + + +class TestCmp(unittest.TestCase): + def test_cmp(self): + for x, y, cmp_python2_value in test_values.cmp_python2_value: + if PY26: + # set cmp works a bit differently in 2.6, we try to emulate 2.7 behavior, so skip set cmp tests + if isinstance(x, set) or isinstance(y, set): + continue + # to get this to run on python <3.4 which lacks subTest + with getattr(self, 'subTest', empty_context_manager)(x=x, y=y): + try: + past_cmp_value = cmp(x, y) + except Exception: + past_cmp_value = traceback.format_exc().strip().split('\n')[-1] + + self.assertEqual(cmp_python2_value, past_cmp_value, + "expected result matching python2 __builtins__.cmp({x!r},{y!r}) " + "== {cmp_python2_value} " + "got past.builtins.cmp({x!r},{y!r}) " + "== {past_cmp_value} " + "".format(x=x, y=y, past_cmp_value=past_cmp_value, + cmp_python2_value=cmp_python2_value)) + + +if __name__ == '__main__': + unittest.main() diff --git a/tests/test_past/test_values.py b/tests/test_past/test_values.py new file mode 100644 index 00000000..11872084 --- /dev/null +++ b/tests/test_past/test_values.py @@ -0,0 +1,225 @@ +from math import pi + +inf, nan = float('inf'), float('nan') +test_values = [ + 0, 1, 2, -1, -9999999999, 9999999, + 0.0, inf, pi, + [], [[]], [1, 2, 3], + set(), set([1, 2, 3]), + " ", "", "1", "dsada saA.", "2", "dsa", b"", b"dsa", b" ", + {5: 3}, dict(), dict(a=99), dict(a=1, b=2, c=3), None +] + +# cmp_python2_values are pre-calculated from running cmp under python2 first values are x and y, last is results of cmp +cmp_python2_value = [[0, 1, -1], [0, 2, -1], [0, -1, 1], [0, -9999999999999999, 1], [0, 9999999999999999, -1], + [0, 0.0, 0], [0, inf, -1], [0, 3.141592653589793, -1], [0, [], -1], [0, [[]], -1], + [0, [1, 2, 3], -1], [0, '', -1], [0, ' ', -1], [0, '1', -1], [0, 'a bee cd.', -1], [0, '', -1], + [0, ' ', -1], [0, '1', -1], [0, 'a bee cd.', -1], [0, set([]), -1], [0, set([1, 2, 3]), -1], + [0, {5: 3}, -1], [0, {}, -1], [0, {'a': 99}, -1], [0, {'a': 1, 'c': 3, 'b': 2}, -1], + [0, {'a': 99, 'c': 3, 'b': 5}, -1], [0, None, 1], [1, 0, 1], [1, 2, -1], [1, -1, 1], + [1, -9999999999999999, 1], [1, 9999999999999999, -1], [1, 0.0, 1], [1, inf, -1], + [1, 3.141592653589793, -1], [1, [], -1], [1, [[]], -1], [1, [1, 2, 3], -1], [1, '', -1], + [1, ' ', -1], [1, '1', -1], [1, 'a bee cd.', -1], [1, '', -1], [1, ' ', -1], [1, '1', -1], + [1, 'a bee cd.', -1], [1, set([]), -1], [1, set([1, 2, 3]), -1], [1, {5: 3}, -1], [1, {}, -1], + [1, {'a': 99}, -1], [1, {'a': 1, 'c': 3, 'b': 2}, -1], [1, {'a': 99, 'c': 3, 'b': 5}, -1], + [1, None, 1], [2, 0, 1], [2, 1, 1], [2, -1, 1], [2, -9999999999999999, 1], + [2, 9999999999999999, -1], [2, 0.0, 1], [2, inf, -1], [2, 3.141592653589793, -1], [2, [], -1], + [2, [[]], -1], [2, [1, 2, 3], -1], [2, '', -1], [2, ' ', -1], [2, '1', -1], [2, 'a bee cd.', -1], + [2, '', -1], [2, ' ', -1], [2, '1', -1], [2, 'a bee cd.', -1], [2, set([]), -1], + [2, set([1, 2, 3]), -1], [2, {5: 3}, -1], [2, {}, -1], [2, {'a': 99}, -1], + [2, {'a': 1, 'c': 3, 'b': 2}, -1], [2, {'a': 99, 'c': 3, 'b': 5}, -1], [2, None, 1], [-1, 0, -1], + [-1, 1, -1], [-1, 2, -1], [-1, -9999999999999999, 1], [-1, 9999999999999999, -1], [-1, 0.0, -1], + [-1, inf, -1], [-1, 3.141592653589793, -1], [-1, [], -1], [-1, [[]], -1], [-1, [1, 2, 3], -1], + [-1, '', -1], [-1, ' ', -1], [-1, '1', -1], [-1, 'a bee cd.', -1], [-1, '', -1], [-1, ' ', -1], + [-1, '1', -1], [-1, 'a bee cd.', -1], [-1, set([]), -1], [-1, set([1, 2, 3]), -1], + [-1, {5: 3}, -1], [-1, {}, -1], [-1, {'a': 99}, -1], [-1, {'a': 1, 'c': 3, 'b': 2}, -1], + [-1, {'a': 99, 'c': 3, 'b': 5}, -1], [-1, None, 1], [-9999999999999999, 0, -1], + [-9999999999999999, 1, -1], [-9999999999999999, 2, -1], [-9999999999999999, -1, -1], + [-9999999999999999, 9999999999999999, -1], [-9999999999999999, 0.0, -1], + [-9999999999999999, inf, -1], [-9999999999999999, 3.141592653589793, -1], + [-9999999999999999, [], -1], [-9999999999999999, [[]], -1], [-9999999999999999, [1, 2, 3], -1], + [-9999999999999999, '', -1], [-9999999999999999, ' ', -1], [-9999999999999999, '1', -1], + [-9999999999999999, 'a bee cd.', -1], [-9999999999999999, '', -1], [-9999999999999999, ' ', -1], + [-9999999999999999, '1', -1], [-9999999999999999, 'a bee cd.', -1], + [-9999999999999999, set([]), -1], [-9999999999999999, set([1, 2, 3]), -1], + [-9999999999999999, {5: 3}, -1], [-9999999999999999, {}, -1], [-9999999999999999, {'a': 99}, -1], + [-9999999999999999, {'a': 1, 'c': 3, 'b': 2}, -1], + [-9999999999999999, {'a': 99, 'c': 3, 'b': 5}, -1], [-9999999999999999, None, 1], + [9999999999999999, 0, 1], [9999999999999999, 1, 1], [9999999999999999, 2, 1], + [9999999999999999, -1, 1], [9999999999999999, -9999999999999999, 1], [9999999999999999, 0.0, 1], + [9999999999999999, inf, -1], [9999999999999999, 3.141592653589793, 1], [9999999999999999, [], -1], + [9999999999999999, [[]], -1], [9999999999999999, [1, 2, 3], -1], [9999999999999999, '', -1], + [9999999999999999, ' ', -1], [9999999999999999, '1', -1], [9999999999999999, 'a bee cd.', -1], + [9999999999999999, '', -1], [9999999999999999, ' ', -1], [9999999999999999, '1', -1], + [9999999999999999, 'a bee cd.', -1], [9999999999999999, set([]), -1], + [9999999999999999, set([1, 2, 3]), -1], [9999999999999999, {5: 3}, -1], [9999999999999999, {}, -1], + [9999999999999999, {'a': 99}, -1], [9999999999999999, {'a': 1, 'c': 3, 'b': 2}, -1], + [9999999999999999, {'a': 99, 'c': 3, 'b': 5}, -1], [9999999999999999, None, 1], [0.0, 0, 0], + [0.0, 1, -1], [0.0, 2, -1], [0.0, -1, 1], [0.0, -9999999999999999, 1], [0.0, 9999999999999999, -1], + [0.0, inf, -1], [0.0, 3.141592653589793, -1], [0.0, [], -1], [0.0, [[]], -1], [0.0, [1, 2, 3], -1], + [0.0, '', -1], [0.0, ' ', -1], [0.0, '1', -1], [0.0, 'a bee cd.', -1], [0.0, '', -1], + [0.0, ' ', -1], [0.0, '1', -1], [0.0, 'a bee cd.', -1], [0.0, set([]), -1], + [0.0, set([1, 2, 3]), -1], [0.0, {5: 3}, -1], [0.0, {}, -1], [0.0, {'a': 99}, -1], + [0.0, {'a': 1, 'c': 3, 'b': 2}, -1], [0.0, {'a': 99, 'c': 3, 'b': 5}, -1], [0.0, None, 1], + [inf, 0, 1], [inf, 1, 1], [inf, 2, 1], [inf, -1, 1], [inf, -9999999999999999, 1], + [inf, 9999999999999999, 1], [inf, 0.0, 1], [inf, 3.141592653589793, 1], [inf, [], -1], + [inf, [[]], -1], [inf, [1, 2, 3], -1], [inf, '', -1], [inf, ' ', -1], [inf, '1', -1], + [inf, 'a bee cd.', -1], [inf, '', -1], [inf, ' ', -1], [inf, '1', -1], [inf, 'a bee cd.', -1], + [inf, set([]), -1], [inf, set([1, 2, 3]), -1], [inf, {5: 3}, -1], [inf, {}, -1], + [inf, {'a': 99}, -1], [inf, {'a': 1, 'c': 3, 'b': 2}, -1], [inf, {'a': 99, 'c': 3, 'b': 5}, -1], + [inf, None, 1], [3.141592653589793, 0, 1], [3.141592653589793, 1, 1], [3.141592653589793, 2, 1], + [3.141592653589793, -1, 1], [3.141592653589793, -9999999999999999, 1], + [3.141592653589793, 9999999999999999, -1], [3.141592653589793, 0.0, 1], + [3.141592653589793, inf, -1], [3.141592653589793, [], -1], [3.141592653589793, [[]], -1], + [3.141592653589793, [1, 2, 3], -1], [3.141592653589793, '', -1], [3.141592653589793, ' ', -1], + [3.141592653589793, '1', -1], [3.141592653589793, 'a bee cd.', -1], [3.141592653589793, '', -1], + [3.141592653589793, ' ', -1], [3.141592653589793, '1', -1], [3.141592653589793, 'a bee cd.', -1], + [3.141592653589793, set([]), -1], [3.141592653589793, set([1, 2, 3]), -1], + [3.141592653589793, {5: 3}, -1], [3.141592653589793, {}, -1], [3.141592653589793, {'a': 99}, -1], + [3.141592653589793, {'a': 1, 'c': 3, 'b': 2}, -1], + [3.141592653589793, {'a': 99, 'c': 3, 'b': 5}, -1], [3.141592653589793, None, 1], [[], 0, 1], + [[], 1, 1], [[], 2, 1], [[], -1, 1], [[], -9999999999999999, 1], [[], 9999999999999999, 1], + [[], 0.0, 1], [[], inf, 1], [[], 3.141592653589793, 1], [[], [[]], -1], [[], [1, 2, 3], -1], + [[], '', -1], [[], ' ', -1], [[], '1', -1], [[], 'a bee cd.', -1], [[], '', -1], [[], ' ', -1], + [[], '1', -1], [[], 'a bee cd.', -1], [[], set([]), -1], [[], set([1, 2, 3]), -1], [[], {5: 3}, 1], + [[], {}, 1], [[], {'a': 99}, 1], [[], {'a': 1, 'c': 3, 'b': 2}, 1], + [[], {'a': 99, 'c': 3, 'b': 5}, 1], [[], None, 1], [[[]], 0, 1], [[[]], 1, 1], [[[]], 2, 1], + [[[]], -1, 1], [[[]], -9999999999999999, 1], [[[]], 9999999999999999, 1], [[[]], 0.0, 1], + [[[]], inf, 1], [[[]], 3.141592653589793, 1], [[[]], [], 1], [[[]], [1, 2, 3], 1], [[[]], '', -1], + [[[]], ' ', -1], [[[]], '1', -1], [[[]], 'a bee cd.', -1], [[[]], '', -1], [[[]], ' ', -1], + [[[]], '1', -1], [[[]], 'a bee cd.', -1], [[[]], set([]), -1], [[[]], set([1, 2, 3]), -1], + [[[]], {5: 3}, 1], [[[]], {}, 1], [[[]], {'a': 99}, 1], [[[]], {'a': 1, 'c': 3, 'b': 2}, 1], + [[[]], {'a': 99, 'c': 3, 'b': 5}, 1], [[[]], None, 1], [[1, 2, 3], 0, 1], [[1, 2, 3], 1, 1], + [[1, 2, 3], 2, 1], [[1, 2, 3], -1, 1], [[1, 2, 3], -9999999999999999, 1], + [[1, 2, 3], 9999999999999999, 1], [[1, 2, 3], 0.0, 1], [[1, 2, 3], inf, 1], + [[1, 2, 3], 3.141592653589793, 1], [[1, 2, 3], [], 1], [[1, 2, 3], [[]], -1], [[1, 2, 3], '', -1], + [[1, 2, 3], ' ', -1], [[1, 2, 3], '1', -1], [[1, 2, 3], 'a bee cd.', -1], [[1, 2, 3], '', -1], + [[1, 2, 3], ' ', -1], [[1, 2, 3], '1', -1], [[1, 2, 3], 'a bee cd.', -1], [[1, 2, 3], set([]), -1], + [[1, 2, 3], set([1, 2, 3]), -1], [[1, 2, 3], {5: 3}, 1], [[1, 2, 3], {}, 1], + [[1, 2, 3], {'a': 99}, 1], [[1, 2, 3], {'a': 1, 'c': 3, 'b': 2}, 1], + [[1, 2, 3], {'a': 99, 'c': 3, 'b': 5}, 1], [[1, 2, 3], None, 1], ['', 0, 1], ['', 1, 1], + ['', 2, 1], ['', -1, 1], ['', -9999999999999999, 1], ['', 9999999999999999, 1], ['', 0.0, 1], + ['', inf, 1], ['', 3.141592653589793, 1], ['', [], 1], ['', [[]], 1], ['', [1, 2, 3], 1], + ['', ' ', -1], ['', '1', -1], ['', 'a bee cd.', -1], ['', '', 0], ['', ' ', -1], ['', '1', -1], + ['', 'a bee cd.', -1], ['', set([]), 1], ['', set([1, 2, 3]), 1], ['', {5: 3}, 1], ['', {}, 1], + ['', {'a': 99}, 1], ['', {'a': 1, 'c': 3, 'b': 2}, 1], ['', {'a': 99, 'c': 3, 'b': 5}, 1], + ['', None, 1], [' ', 0, 1], [' ', 1, 1], [' ', 2, 1], [' ', -1, 1], [' ', -9999999999999999, 1], + [' ', 9999999999999999, 1], [' ', 0.0, 1], [' ', inf, 1], [' ', 3.141592653589793, 1], + [' ', [], 1], [' ', [[]], 1], [' ', [1, 2, 3], 1], [' ', '', 1], [' ', '1', -1], + [' ', 'a bee cd.', -1], [' ', '', 1], [' ', ' ', 0], [' ', '1', -1], [' ', 'a bee cd.', -1], + [' ', set([]), 1], [' ', set([1, 2, 3]), 1], [' ', {5: 3}, 1], [' ', {}, 1], [' ', {'a': 99}, 1], + [' ', {'a': 1, 'c': 3, 'b': 2}, 1], [' ', {'a': 99, 'c': 3, 'b': 5}, 1], [' ', None, 1], + ['1', 0, 1], ['1', 1, 1], ['1', 2, 1], ['1', -1, 1], ['1', -9999999999999999, 1], + ['1', 9999999999999999, 1], ['1', 0.0, 1], ['1', inf, 1], ['1', 3.141592653589793, 1], + ['1', [], 1], ['1', [[]], 1], ['1', [1, 2, 3], 1], ['1', '', 1], ['1', ' ', 1], + ['1', 'a bee cd.', -1], ['1', '', 1], ['1', ' ', 1], ['1', '1', 0], ['1', 'a bee cd.', -1], + ['1', set([]), 1], ['1', set([1, 2, 3]), 1], ['1', {5: 3}, 1], ['1', {}, 1], ['1', {'a': 99}, 1], + ['1', {'a': 1, 'c': 3, 'b': 2}, 1], ['1', {'a': 99, 'c': 3, 'b': 5}, 1], ['1', None, 1], + ['a bee cd.', 0, 1], ['a bee cd.', 1, 1], ['a bee cd.', 2, 1], ['a bee cd.', -1, 1], + ['a bee cd.', -9999999999999999, 1], ['a bee cd.', 9999999999999999, 1], ['a bee cd.', 0.0, 1], + ['a bee cd.', inf, 1], ['a bee cd.', 3.141592653589793, 1], ['a bee cd.', [], 1], + ['a bee cd.', [[]], 1], ['a bee cd.', [1, 2, 3], 1], ['a bee cd.', '', 1], ['a bee cd.', ' ', 1], + ['a bee cd.', '1', 1], ['a bee cd.', '', 1], ['a bee cd.', ' ', 1], ['a bee cd.', '1', 1], + ['a bee cd.', 'a bee cd.', 0], ['a bee cd.', set([]), 1], ['a bee cd.', set([1, 2, 3]), 1], + ['a bee cd.', {5: 3}, 1], ['a bee cd.', {}, 1], ['a bee cd.', {'a': 99}, 1], + ['a bee cd.', {'a': 1, 'c': 3, 'b': 2}, 1], ['a bee cd.', {'a': 99, 'c': 3, 'b': 5}, 1], + ['a bee cd.', None, 1], ['', 0, 1], ['', 1, 1], ['', 2, 1], ['', -1, 1], + ['', -9999999999999999, 1], ['', 9999999999999999, 1], ['', 0.0, 1], ['', inf, 1], + ['', 3.141592653589793, 1], ['', [], 1], ['', [[]], 1], ['', [1, 2, 3], 1], ['', '', 0], + ['', ' ', -1], ['', '1', -1], ['', 'a bee cd.', -1], ['', ' ', -1], ['', '1', -1], + ['', 'a bee cd.', -1], ['', set([]), 1], ['', set([1, 2, 3]), 1], ['', {5: 3}, 1], ['', {}, 1], + ['', {'a': 99}, 1], ['', {'a': 1, 'c': 3, 'b': 2}, 1], ['', {'a': 99, 'c': 3, 'b': 5}, 1], + ['', None, 1], [' ', 0, 1], [' ', 1, 1], [' ', 2, 1], [' ', -1, 1], [' ', -9999999999999999, 1], + [' ', 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