643 lines
27 KiB
Python
643 lines
27 KiB
Python
# -*- coding: utf-8 -*-
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from __future__ import division, unicode_literals, print_function, absolute_import
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import math
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import copy
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import itertools
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import operator as op
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from pint.unit import (ScaleConverter, OffsetConverter, UnitsContainer,
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Definition, PrefixDefinition, UnitDefinition,
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DimensionDefinition, _freeze, Converter, UnitRegistry,
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LazyRegistry, ParserHelper)
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from pint import DimensionalityError, UndefinedUnitError
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from pint.compat import u, unittest, np, string_types
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from pint.testsuite import QuantityTestCase, helpers, BaseTestCase
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from pint.testsuite.parameterized import ParameterizedTestCase
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class TestConverter(BaseTestCase):
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def test_converter(self):
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c = Converter()
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self.assertTrue(c.is_multiplicative)
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self.assertTrue(c.to_reference(8))
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self.assertTrue(c.from_reference(8))
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def test_multiplicative_converter(self):
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c = ScaleConverter(20.)
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self.assertEqual(c.from_reference(c.to_reference(100)), 100)
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self.assertEqual(c.to_reference(c.from_reference(100)), 100)
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def test_offset_converter(self):
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c = OffsetConverter(20., 2)
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self.assertEqual(c.from_reference(c.to_reference(100)), 100)
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self.assertEqual(c.to_reference(c.from_reference(100)), 100)
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@helpers.requires_numpy()
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def test_converter_inplace(self):
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for c in (ScaleConverter(20.), OffsetConverter(20., 2)):
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fun1 = lambda x, y: c.from_reference(c.to_reference(x, y), y)
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fun2 = lambda x, y: c.to_reference(c.from_reference(x, y), y)
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for fun, (inplace, comp) in itertools.product((fun1, fun2),
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((True, self.assertIs), (False, self.assertIsNot))):
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a = np.ones((1, 10))
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ac = np.ones((1, 10))
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r = fun(a, inplace)
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np.testing.assert_allclose(r, ac)
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comp(a, r)
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class TestDefinition(BaseTestCase):
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def test_invalid(self):
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self.assertRaises(ValueError, Definition.from_string, 'x = [time] * meter')
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self.assertRaises(ValueError, Definition.from_string, '[x] = [time] * meter')
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def test_prefix_definition(self):
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for definition in ('m- = 1e-3', 'm- = 10**-3', 'm- = 0.001'):
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x = Definition.from_string(definition)
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self.assertIsInstance(x, PrefixDefinition)
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self.assertEqual(x.name, 'm')
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self.assertEqual(x.aliases, ())
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self.assertEqual(x.converter.to_reference(1000), 1)
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self.assertEqual(x.converter.from_reference(0.001), 1)
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self.assertEqual(str(x), 'm')
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x = Definition.from_string('kilo- = 1e-3 = k-')
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self.assertIsInstance(x, PrefixDefinition)
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self.assertEqual(x.name, 'kilo')
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self.assertEqual(x.aliases, ())
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self.assertEqual(x.symbol, 'k')
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self.assertEqual(x.converter.to_reference(1000), 1)
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self.assertEqual(x.converter.from_reference(.001), 1)
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x = Definition.from_string('kilo- = 1e-3 = k- = anotherk-')
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self.assertIsInstance(x, PrefixDefinition)
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self.assertEqual(x.name, 'kilo')
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self.assertEqual(x.aliases, ('anotherk', ))
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self.assertEqual(x.symbol, 'k')
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self.assertEqual(x.converter.to_reference(1000), 1)
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self.assertEqual(x.converter.from_reference(.001), 1)
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def test_baseunit_definition(self):
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x = Definition.from_string('meter = [length]')
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self.assertIsInstance(x, UnitDefinition)
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self.assertTrue(x.is_base)
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self.assertEqual(x.reference, UnitsContainer({'[length]': 1}))
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def test_unit_definition(self):
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x = Definition.from_string('coulomb = ampere * second')
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self.assertIsInstance(x, UnitDefinition)
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self.assertFalse(x.is_base)
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self.assertIsInstance(x.converter, ScaleConverter)
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self.assertEqual(x.converter.scale, 1)
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self.assertEqual(x.reference, UnitsContainer(ampere=1, second=1))
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x = Definition.from_string('faraday = 96485.3399 * coulomb')
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self.assertIsInstance(x, UnitDefinition)
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self.assertFalse(x.is_base)
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self.assertIsInstance(x.converter, ScaleConverter)
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self.assertEqual(x.converter.scale, 96485.3399)
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self.assertEqual(x.reference, UnitsContainer(coulomb=1))
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x = Definition.from_string('degF = 9 / 5 * kelvin; offset: 255.372222')
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self.assertIsInstance(x, UnitDefinition)
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self.assertFalse(x.is_base)
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self.assertIsInstance(x.converter, OffsetConverter)
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self.assertEqual(x.converter.scale, 9/5)
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self.assertEqual(x.converter.offset, 255.372222)
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self.assertEqual(x.reference, UnitsContainer(kelvin=1))
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def test_dimension_definition(self):
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x = DimensionDefinition('[time]', '', (), converter='')
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self.assertTrue(x.is_base)
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self.assertEqual(x.name, '[time]')
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x = Definition.from_string('[speed] = [length]/[time]')
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self.assertIsInstance(x, DimensionDefinition)
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self.assertEqual(x.reference, UnitsContainer({'[length]': 1, '[time]': -1}))
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class TestUnitsContainer(QuantityTestCase):
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def _test_inplace(self, operator, value1, value2, expected_result):
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value1 = copy.copy(value1)
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value2 = copy.copy(value2)
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id1 = id(value1)
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id2 = id(value2)
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value1 = operator(value1, value2)
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value2_cpy = copy.copy(value2)
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self.assertEqual(value1, expected_result)
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self.assertEqual(id1, id(value1))
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self.assertEqual(value2, value2_cpy)
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self.assertEqual(id2, id(value2))
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def _test_not_inplace(self, operator, value1, value2, expected_result):
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id1 = id(value1)
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id2 = id(value2)
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value1_cpy = copy.copy(value1)
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value2_cpy = copy.copy(value2)
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result = operator(value1, value2)
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self.assertEqual(expected_result, result)
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self.assertEqual(value1, value1_cpy)
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self.assertEqual(value2, value2_cpy)
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self.assertNotEqual(id(result), id1)
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self.assertNotEqual(id(result), id2)
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def test_unitcontainer_creation(self):
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x = UnitsContainer(meter=1, second=2)
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y = UnitsContainer({'meter': 1.0, 'second': 2.0})
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self.assertIsInstance(x['meter'], float)
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self.assertEqual(x, y)
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self.assertIsNot(x, y)
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z = copy.copy(x)
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self.assertEqual(x, z)
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self.assertIsNot(x, z)
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z = UnitsContainer(x)
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self.assertEqual(x, z)
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self.assertIsNot(x, z)
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def test_unitcontainer_repr(self):
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x = UnitsContainer()
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self.assertEqual(str(x), 'dimensionless')
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self.assertEqual(repr(x), '<UnitsContainer({})>')
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x = UnitsContainer(meter=1, second=2)
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self.assertEqual(str(x), 'meter * second ** 2')
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self.assertEqual(repr(x), "<UnitsContainer({'meter': 1.0, 'second': 2.0})>")
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x = UnitsContainer(meter=1, second=2.5)
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self.assertEqual(str(x), 'meter * second ** 2.5')
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self.assertEqual(repr(x), "<UnitsContainer({'meter': 1.0, 'second': 2.5})>")
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def test_unitcontainer_bool(self):
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self.assertTrue(UnitsContainer(meter=1, second=2))
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self.assertFalse(UnitsContainer())
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def test_unitcontainer_comp(self):
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x = UnitsContainer(meter=1, second=2)
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y = UnitsContainer(meter=1., second=2)
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z = UnitsContainer(meter=1, second=3)
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self.assertTrue(x == y)
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self.assertFalse(x != y)
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self.assertFalse(x == z)
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self.assertTrue(x != z)
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def test_unitcontainer_arithmetic(self):
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x = UnitsContainer(meter=1)
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y = UnitsContainer(second=1)
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z = UnitsContainer(meter=1, second=-2)
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self._test_not_inplace(op.mul, x, y, UnitsContainer(meter=1, second=1))
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self._test_not_inplace(op.truediv, x, y, UnitsContainer(meter=1, second=-1))
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self._test_not_inplace(op.pow, z, 2, UnitsContainer(meter=2, second=-4))
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self._test_not_inplace(op.pow, z, -2, UnitsContainer(meter=-2, second=4))
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self._test_inplace(op.imul, x, y, UnitsContainer(meter=1, second=1))
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self._test_inplace(op.itruediv, x, y, UnitsContainer(meter=1, second=-1))
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self._test_inplace(op.ipow, z, 2, UnitsContainer(meter=2, second=-4))
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self._test_inplace(op.ipow, z, -2, UnitsContainer(meter=-2, second=4))
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def test_string_comparison(self):
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x = UnitsContainer(meter=1)
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y = UnitsContainer(second=1)
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z = UnitsContainer(meter=1, second=-2)
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self.assertEqual(x, 'meter')
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self.assertEqual('meter', x)
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self.assertNotEqual(x, 'meter ** 2')
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self.assertNotEqual(x, 'meter * meter')
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self.assertNotEqual(x, 'second')
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self.assertEqual(y, 'second')
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self.assertEqual(z, 'meter/second/second')
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def test_invalid(self):
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self.assertRaises(TypeError, UnitsContainer, {1: 2})
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self.assertRaises(TypeError, UnitsContainer, {'1': '2'})
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d = UnitsContainer()
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self.assertRaises(TypeError, d.__setitem__, 1, 2)
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self.assertRaises(TypeError, d.__setitem__, '1', '2')
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self.assertRaises(TypeError, d.__mul__, list())
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self.assertRaises(TypeError, d.__imul__, list())
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self.assertRaises(TypeError, d.__pow__, list())
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self.assertRaises(TypeError, d.__ipow__, list())
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self.assertRaises(TypeError, d.__truediv__, list())
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self.assertRaises(TypeError, d.__itruediv__, list())
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self.assertRaises(TypeError, d.__rtruediv__, list())
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class TestRegistry(QuantityTestCase):
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FORCE_NDARRAY = False
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def setup(self):
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self.ureg.autoconvert_offset_to_baseunit = False
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def test_base(self):
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ureg = UnitRegistry(None)
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ureg.define('meter = [length]')
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self.assertRaises(ValueError, ureg.define, 'meter = [length]')
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self.assertRaises(TypeError, ureg.define, list())
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x = ureg.define('degC = kelvin; offset: 273.15')
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def test_define(self):
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ureg = UnitRegistry(None)
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self.assertIsInstance(dir(ureg), list)
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self.assertGreater(len(dir(ureg)), 0)
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def test_load(self):
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import pkg_resources
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from pint import unit
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data = pkg_resources.resource_filename(unit.__name__, 'default_en.txt')
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ureg1 = UnitRegistry()
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ureg2 = UnitRegistry(data)
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self.assertEqual(dir(ureg1), dir(ureg2))
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self.assertRaises(ValueError, UnitRegistry(None).load_definitions, 'notexisting')
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def test_default_format(self):
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ureg = UnitRegistry()
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q = ureg.meter
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s1 = '{0}'.format(q)
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s2 = '{0:~}'.format(q)
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ureg.default_format = '~'
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s3 = '{0}'.format(q)
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self.assertEqual(s2, s3)
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self.assertNotEqual(s1, s3)
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self.assertEqual(ureg.default_format, '~')
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def test_parse_number(self):
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self.assertEqual(self.ureg.parse_expression('pi'), math.pi)
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self.assertEqual(self.ureg.parse_expression('x', x=2), 2)
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self.assertEqual(self.ureg.parse_expression('x', x=2.3), 2.3)
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self.assertEqual(self.ureg.parse_expression('x * y', x=2.3, y=3), 2.3 * 3)
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self.assertEqual(self.ureg.parse_expression('x', x=(1+1j)), (1+1j))
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def test_parse_single(self):
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self.assertEqual(self.ureg.parse_expression('meter'), self.Q_(1, UnitsContainer(meter=1.)))
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self.assertEqual(self.ureg.parse_expression('second'), self.Q_(1, UnitsContainer(second=1.)))
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def test_parse_alias(self):
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self.assertEqual(self.ureg.parse_expression('metre'), self.Q_(1, UnitsContainer(meter=1.)))
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def test_parse_plural(self):
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self.assertEqual(self.ureg.parse_expression('meters'), self.Q_(1, UnitsContainer(meter=1.)))
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def test_parse_prefix(self):
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self.assertEqual(self.ureg.parse_expression('kilometer'), self.Q_(1, UnitsContainer(kilometer=1.)))
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#self.assertEqual(self.ureg._units['kilometer'], self.Q_(1000., UnitsContainer(meter=1.)))
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def test_parse_complex(self):
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self.assertEqual(self.ureg.parse_expression('kilometre'), self.Q_(1, UnitsContainer(kilometer=1.)))
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self.assertEqual(self.ureg.parse_expression('kilometres'), self.Q_(1, UnitsContainer(kilometer=1.)))
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def test_str_errors(self):
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self.assertEqual(str(UndefinedUnitError('rabbits')), "'{0!s}' is not defined in the unit registry".format('rabbits'))
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self.assertEqual(str(UndefinedUnitError(('rabbits', 'horses'))), "{0!s} are not defined in the unit registry".format(('rabbits', 'horses')))
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self.assertEqual(u(str(DimensionalityError('meter', 'second'))),
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"Cannot convert from 'meter' to 'second'")
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self.assertEqual(str(DimensionalityError('meter', 'second', 'length', 'time')),
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"Cannot convert from 'meter' (length) to 'second' (time)")
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def test_parse_mul_div(self):
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self.assertEqual(self.ureg.parse_expression('meter*meter'), self.Q_(1, UnitsContainer(meter=2.)))
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self.assertEqual(self.ureg.parse_expression('meter**2'), self.Q_(1, UnitsContainer(meter=2.)))
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self.assertEqual(self.ureg.parse_expression('meter*second'), self.Q_(1, UnitsContainer(meter=1., second=1)))
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self.assertEqual(self.ureg.parse_expression('meter/second'), self.Q_(1, UnitsContainer(meter=1., second=-1)))
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self.assertEqual(self.ureg.parse_expression('meter/second**2'), self.Q_(1, UnitsContainer(meter=1., second=-2)))
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def test_parse_pretty(self):
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self.assertEqual(self.ureg.parse_expression('meter/second²'),
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self.Q_(1, UnitsContainer(meter=1., second=-2)))
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self.assertEqual(self.ureg.parse_expression('m³/s³'),
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self.Q_(1, UnitsContainer(meter=3., second=-3)))
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self.assertEqual(self.ureg.parse_expression('meter² · second'),
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self.Q_(1, UnitsContainer(meter=2., second=1)))
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self.assertEqual(self.ureg.parse_expression('meter⁰.⁵·second'),
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self.Q_(1, UnitsContainer(meter=0.5, second=1)))
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self.assertEqual(self.ureg.parse_expression('meter³⁷/second⁴.³²¹'),
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self.Q_(1, UnitsContainer(meter=37, second=-4.321)))
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def test_parse_factor(self):
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self.assertEqual(self.ureg.parse_expression('42*meter'), self.Q_(42, UnitsContainer(meter=1.)))
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self.assertEqual(self.ureg.parse_expression('meter*42'), self.Q_(42, UnitsContainer(meter=1.)))
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def test_rep_and_parse(self):
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q = self.Q_(1, 'g/(m**2*s)')
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self.assertEqual(self.Q_(q.magnitude, str(q.units)), q)
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def test_as_delta(self):
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parse = self.ureg.parse_units
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self.assertEqual(parse('kelvin', as_delta=True), UnitsContainer(kelvin=1))
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self.assertEqual(parse('kelvin', as_delta=False), UnitsContainer(kelvin=1))
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self.assertEqual(parse('kelvin**(-1)', as_delta=True), UnitsContainer(kelvin=-1))
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self.assertEqual(parse('kelvin**(-1)', as_delta=False), UnitsContainer(kelvin=-1))
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self.assertEqual(parse('kelvin**2', as_delta=True), UnitsContainer(kelvin=2))
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self.assertEqual(parse('kelvin**2', as_delta=False), UnitsContainer(kelvin=2))
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self.assertEqual(parse('kelvin*meter', as_delta=True), UnitsContainer(kelvin=1, meter= 1))
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self.assertEqual(parse('kelvin*meter', as_delta=False), UnitsContainer(kelvin=1, meter=1))
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def test_name(self):
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self.assertRaises(UndefinedUnitError, self.ureg.get_name, 'asdf')
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def test_symbol(self):
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self.assertRaises(UndefinedUnitError, self.ureg.get_symbol, 'asdf')
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self.assertEqual(self.ureg.get_symbol('meter'), 'm')
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self.assertEqual(self.ureg.get_symbol('second'), 's')
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self.assertEqual(self.ureg.get_symbol('hertz'), 'Hz')
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self.assertEqual(self.ureg.get_symbol('kilometer'), 'km')
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self.assertEqual(self.ureg.get_symbol('megahertz'), 'MHz')
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self.assertEqual(self.ureg.get_symbol('millisecond'), 'ms')
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def test_imperial_symbol(self):
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self.assertEqual(self.ureg.get_symbol('inch'), 'in')
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self.assertEqual(self.ureg.get_symbol('foot'), 'ft')
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self.assertEqual(self.ureg.get_symbol('inches'), 'in')
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self.assertEqual(self.ureg.get_symbol('feet'), 'ft')
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self.assertEqual(self.ureg.get_symbol('international_foot'), 'ft')
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self.assertEqual(self.ureg.get_symbol('international_inch'), 'in')
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def test_pint(self):
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p = self.ureg.pint
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l = self.ureg.liter
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ip = self.ureg.imperial_pint
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self.assertLess(p, l)
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self.assertLess(p, ip)
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def test_wraps(self):
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def func(x):
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return x
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ureg = self.ureg
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f0 = ureg.wraps(None, [None, ])(func)
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self.assertEqual(f0(3.), 3.)
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f0 = ureg.wraps(None, None, )(func)
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self.assertEqual(f0(3.), 3.)
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f1 = ureg.wraps(None, ['meter', ])(func)
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self.assertRaises(ValueError, f1, 3.)
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self.assertEqual(f1(3. * ureg.centimeter), 0.03)
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self.assertEqual(f1(3. * ureg.meter), 3.)
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self.assertRaises(ValueError, f1, 3 * ureg.second)
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f1b = ureg.wraps(None, [ureg.meter, ])(func)
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self.assertRaises(ValueError, f1b, 3.)
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self.assertEqual(f1b(3. * ureg.centimeter), 0.03)
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self.assertEqual(f1b(3. * ureg.meter), 3.)
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self.assertRaises(ValueError, f1b, 3 * ureg.second)
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f1 = ureg.wraps(None, 'meter')(func)
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self.assertRaises(ValueError, f1, 3.)
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self.assertEqual(f1(3. * ureg.centimeter), 0.03)
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self.assertEqual(f1(3. * ureg.meter), 3.)
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self.assertRaises(ValueError, f1, 3 * ureg.second)
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f2 = ureg.wraps('centimeter', ['meter', ])(func)
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self.assertRaises(ValueError, f2, 3.)
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self.assertEqual(f2(3. * ureg.centimeter), 0.03 * ureg.centimeter)
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self.assertEqual(f2(3. * ureg.meter), 3 * ureg.centimeter)
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|
f3 = ureg.wraps('centimeter', ['meter', ], strict=False)(func)
|
|
self.assertEqual(f3(3), 3 * ureg.centimeter)
|
|
self.assertEqual(f3(3. * ureg.centimeter), 0.03 * ureg.centimeter)
|
|
self.assertEqual(f3(3. * ureg.meter), 3. * ureg.centimeter)
|
|
|
|
def gfunc(x, y):
|
|
return x + y
|
|
|
|
g0 = ureg.wraps(None, [None, None])(gfunc)
|
|
self.assertEqual(g0(3, 1), 4)
|
|
|
|
g1 = ureg.wraps(None, ['meter', 'centimeter'])(gfunc)
|
|
self.assertRaises(ValueError, g1, 3 * ureg.meter, 1)
|
|
self.assertEqual(g1(3 * ureg.meter, 1 * ureg.centimeter), 4)
|
|
self.assertEqual(g1(3 * ureg.meter, 1 * ureg.meter), 3 + 100)
|
|
|
|
def hfunc(x, y):
|
|
return x, y
|
|
|
|
h0 = ureg.wraps(None, [None, None])(hfunc)
|
|
self.assertEqual(h0(3, 1), (3, 1))
|
|
|
|
h1 = ureg.wraps(['meter', 'cm'], [None, None])(hfunc)
|
|
self.assertEqual(h1(3, 1), [3 * ureg.meter, 1 * ureg.cm])
|
|
|
|
h2 = ureg.wraps(('meter', 'cm'), [None, None])(hfunc)
|
|
self.assertEqual(h2(3, 1), (3 * ureg.meter, 1 * ureg.cm))
|
|
|
|
def test_to_ref_vs_to(self):
|
|
self.ureg.autoconvert_offset_to_baseunit = True
|
|
q = 8. * self.ureg.inch
|
|
t = 8. * self.ureg.degF
|
|
dt = 8. * self.ureg.delta_degF
|
|
self.assertEqual(q.to('cm').magnitude, self.ureg._units['inch'].converter.to_reference(8.))
|
|
self.assertEqual(t.to('kelvin').magnitude, self.ureg._units['degF'].converter.to_reference(8.))
|
|
self.assertEqual(dt.to('kelvin').magnitude, self.ureg._units['delta_degF'].converter.to_reference(8.))
|
|
|
|
def test_redefinition(self):
|
|
d = UnitRegistry().define
|
|
|
|
with self.capture_log() as buffer:
|
|
d('meter = [fruits]')
|
|
d('kilo- = 1000')
|
|
d('[speed] = [vegetables]')
|
|
|
|
# aliases
|
|
d('bla = 3.2 meter = inch')
|
|
d('myk- = 1000 = kilo-')
|
|
|
|
self.assertEqual(len(buffer), 5)
|
|
|
|
def test_convert_parse_str(self):
|
|
ureg = self.ureg
|
|
self.assertEqual(ureg.convert(1, 'meter', 'inch'),
|
|
ureg.convert(1, UnitsContainer(meter=1), UnitsContainer(inch=1)))
|
|
|
|
@helpers.requires_numpy()
|
|
def test_convert_inplace(self):
|
|
ureg = self.ureg
|
|
|
|
# Conversions with single units take a different codepath than
|
|
# Conversions with more than one unit.
|
|
src_dst1 = UnitsContainer(meter=1), UnitsContainer(inch=1)
|
|
src_dst2 = UnitsContainer(meter=1, second=-1), UnitsContainer(inch=1, minute=-1)
|
|
for src, dst in (src_dst1, src_dst2):
|
|
v = ureg.convert(1, src, dst),
|
|
|
|
a = np.ones((3, 1))
|
|
ac = np.ones((3, 1))
|
|
|
|
r1 = ureg.convert(a, src, dst)
|
|
np.testing.assert_allclose(r1, v * ac)
|
|
self.assertIsNot(r1, a)
|
|
|
|
r2 = ureg.convert(a, src, dst, inplace=True)
|
|
np.testing.assert_allclose(r2, v * ac)
|
|
self.assertIs(r2, a)
|
|
|
|
def test_repeated_convert(self):
|
|
# Because of caching, repeated conversions were failing.
|
|
self.ureg.convert(1, "m", "ft")
|
|
self.ureg.convert(1, "m", "ft")
|
|
|
|
def test_singular_SI_prefix_convert(self):
|
|
# Fix for issue 156
|
|
self.ureg.convert(1, 'mm', 'm')
|
|
self.ureg.convert(1, 'ms', 's')
|
|
self.ureg.convert(1, 'm', 'mm')
|
|
self.ureg.convert(1, 's', 'ms')
|
|
|
|
def test_parse_units(self):
|
|
ureg = self.ureg
|
|
self.assertEqual(ureg.parse_units(''), UnitsContainer())
|
|
self.assertRaises(ValueError, ureg.parse_units, '2 * meter')
|
|
|
|
|
|
class TestCompatibleUnits(QuantityTestCase):
|
|
|
|
FORCE_NDARRAY= False
|
|
|
|
def _test(self, input_units):
|
|
gd = self.ureg.get_dimensionality
|
|
dim = gd(input_units)
|
|
equiv = self.ureg.get_compatible_units(input_units)
|
|
for eq in equiv:
|
|
self.assertEqual(gd(eq), dim)
|
|
self.assertEqual(equiv, self.ureg.get_compatible_units(dim))
|
|
|
|
def _test2(self, units1, units2):
|
|
equiv1 = self.ureg.get_compatible_units(units1)
|
|
equiv2 = self.ureg.get_compatible_units(units2)
|
|
self.assertEqual(equiv1, equiv2)
|
|
|
|
def test_many(self):
|
|
self._test(self.ureg.meter.units)
|
|
self._test(self.ureg.seconds.units)
|
|
self._test(self.ureg.newton.units)
|
|
self._test(self.ureg.kelvin.units)
|
|
|
|
def test_context_sp(self):
|
|
|
|
|
|
gd = self.ureg.get_dimensionality
|
|
|
|
# length, frequency, energy
|
|
valid = [gd(self.ureg.meter.units), gd(self.ureg.hertz.units), gd(self.ureg.joule.units)]
|
|
|
|
with self.ureg.context('sp'):
|
|
equiv = self.ureg.get_compatible_units(self.ureg.meter.units)
|
|
result = set()
|
|
for eq in equiv:
|
|
dim = gd(eq)
|
|
result.add(_freeze(dim))
|
|
self.assertIn(dim, valid)
|
|
|
|
self.assertEqual(len(result), len(valid))
|
|
|
|
def test_get_base_units(self):
|
|
ureg = UnitRegistry()
|
|
self.assertEqual(ureg.get_base_units(''), (1, UnitsContainer()))
|
|
self.assertEqual(ureg.get_base_units('meter'), ureg.get_base_units(ParserHelper(meter=1)))
|
|
|
|
def test_get_compatible_units(self):
|
|
ureg = UnitRegistry()
|
|
self.assertEqual(ureg.get_compatible_units(''), (1, UnitsContainer()))
|
|
self.assertEqual(ureg.get_compatible_units('meter'), ureg.get_compatible_units(ParserHelper(meter=1)))
|
|
|
|
|
|
class TestRegistryWithDefaultRegistry(TestRegistry):
|
|
|
|
@classmethod
|
|
def setUpClass(cls):
|
|
from pint import _DEFAULT_REGISTRY
|
|
cls.ureg = _DEFAULT_REGISTRY
|
|
cls.Q_ = cls.ureg.Quantity
|
|
|
|
def test_lazy(self):
|
|
x = LazyRegistry()
|
|
x.test = 'test'
|
|
self.assertIsInstance(x, UnitRegistry)
|
|
y = LazyRegistry()
|
|
q = y('meter')
|
|
self.assertIsInstance(y, UnitRegistry)
|
|
|
|
def test_redefinition(self):
|
|
d = self.ureg.define
|
|
self.assertRaises(ValueError, d, 'meter = [time]')
|
|
self.assertRaises(ValueError, d, 'kilo- = 1000')
|
|
self.assertRaises(ValueError, d, '[speed] = [length]')
|
|
|
|
# aliases
|
|
self.assertIn('inch', self.ureg._units)
|
|
self.assertRaises(ValueError, d, 'bla = 3.2 meter = inch')
|
|
self.assertRaises(ValueError, d, 'myk- = 1000 = kilo-')
|
|
|
|
|
|
class TestErrors(BaseTestCase):
|
|
|
|
def test_errors(self):
|
|
x = ('meter', )
|
|
msg = "'meter' is not defined in the unit registry"
|
|
self.assertEqual(str(UndefinedUnitError(x)), msg)
|
|
self.assertEqual(str(UndefinedUnitError(list(x))), msg)
|
|
self.assertEqual(str(UndefinedUnitError(set(x))), msg)
|
|
|
|
msg = "Cannot convert from 'a' (c) to 'b' (d)msg"
|
|
ex = DimensionalityError('a', 'b', 'c', 'd', 'msg')
|
|
self.assertEqual(str(ex), msg)
|
|
|
|
|
|
class TestConvertWithOffset(QuantityTestCase, ParameterizedTestCase):
|
|
|
|
# The dicts in convert_with_offset are used to create a UnitsContainer.
|
|
# We create UnitsContainer to avoid any auto-conversion of units.
|
|
convert_with_offset = [
|
|
(({'degC': 1}, {'degC': 1}), 10),
|
|
(({'degC': 1}, {'kelvin': 1}), 283.15),
|
|
(({'degC': 1}, {'degC': 1, 'millimeter': 1, 'meter': -1}), 'error'),
|
|
(({'degC': 1}, {'kelvin': 1, 'millimeter': 1, 'meter': -1}), 283150),
|
|
|
|
(({'kelvin': 1}, {'degC': 1}), -263.15),
|
|
(({'kelvin': 1}, {'kelvin': 1}), 10),
|
|
(({'kelvin': 1}, {'degC': 1, 'millimeter': 1, 'meter': -1}), 'error'),
|
|
(({'kelvin': 1}, {'kelvin': 1, 'millimeter': 1, 'meter': -1}), 10000),
|
|
|
|
(({'degC': 1, 'millimeter': 1, 'meter': -1}, {'degC': 1}), 'error'),
|
|
(({'degC': 1, 'millimeter': 1, 'meter': -1}, {'kelvin': 1}), 'error'),
|
|
(({'degC': 1, 'millimeter': 1, 'meter': -1}, {'degC': 1, 'millimeter': 1, 'meter': -1}), 10),
|
|
(({'degC': 1, 'millimeter': 1, 'meter': -1}, {'kelvin': 1, 'millimeter': 1, 'meter': -1}), 'error'),
|
|
|
|
(({'kelvin': 1, 'millimeter': 1, 'meter': -1}, {'degC': 1}), -273.14),
|
|
(({'kelvin': 1, 'millimeter': 1, 'meter': -1}, {'kelvin': 1}), 0.01),
|
|
(({'kelvin': 1, 'millimeter': 1, 'meter': -1}, {'degC': 1, 'millimeter': 1, 'meter': -1}), 'error'),
|
|
(({'kelvin': 1, 'millimeter': 1, 'meter': -1}, {'kelvin': 1, 'millimeter': 1, 'meter': -1}), 10),
|
|
|
|
(({'degC': 2}, {'kelvin': 2}), 'error'),
|
|
(({'degC': 1, 'degF': 1}, {'kelvin': 2}), 'error'),
|
|
(({'degC': 1, 'kelvin': 1}, {'kelvin': 2}), 'error'),
|
|
]
|
|
|
|
@ParameterizedTestCase.parameterize(("input", "expected_output"),
|
|
convert_with_offset)
|
|
def test_to_and_from_offset_units(self, input_tuple, expected):
|
|
src, dst = input_tuple
|
|
src, dst = UnitsContainer(src), UnitsContainer(dst)
|
|
value = 10.
|
|
convert = self.ureg.convert
|
|
if isinstance(expected, string_types):
|
|
self.assertRaises(DimensionalityError, convert, value, src, dst)
|
|
if src != dst:
|
|
self.assertRaises(DimensionalityError, convert, value, dst, src)
|
|
else:
|
|
self.assertQuantityAlmostEqual(convert(value, src, dst),
|
|
expected, atol=0.001)
|
|
if src != dst:
|
|
self.assertQuantityAlmostEqual(convert(expected, dst, src),
|
|
value, atol=0.001)
|