def test_get_base_units_different_exponent(self):
sysname = "mysys3"
ureg = UnitRegistry()
g = ureg.get_group("test-imperial")
g.add_units("inch", "yard", "pint")
ureg.get_compatible_units("meter", "test-imperial")
lines = ["@system %s using test-imperial" % sysname, "pint:meter"]
s = ureg.System.from_lines(lines, ureg.get_base_units)
ureg._systems[s.name] = s
# base_factor, destination_units
c = ureg.get_base_units("inch", system=sysname)
assert round(abs(c[0] - 0.326), 3) == 0
assert c[1] == {"pint": 1.0 / 3}
c = ureg.get_base_units("cm", system=sysname)
assert round(abs(c[0] - 0.1283), 3) == 0
assert c[1] == {"pint": 1.0 / 3}
c = ureg.get_base_units("inch**2", system=sysname)
assert round(abs(c[0] - 0.326**2), 3) == 0
assert c[1] == {"pint": 2.0 / 3}
c = ureg.get_base_units("cm**2", system=sysname)
assert round(abs(c[0] - 0.1283**2), 3) == 0
assert c[1] == {"pint": 2.0 / 3}
def test_get_base_units_different_exponent(self):
sysname = "mysys3"
ureg = UnitRegistry()
g = ureg.get_group("test-imperial")
g.add_units("inch", "yard", "pint")
ureg.get_compatible_units("meter", "test-imperial")
lines = ["@system %s using test-imperial" % sysname, "pint:meter"]
s = ureg.System.from_lines(lines, ureg.get_base_units)
ureg._systems[s.name] = s
# base_factor, destination_units
c = ureg.get_base_units("inch", system=sysname)
self.assertAlmostEqual(c[0], 0.326, places=3)
self.assertEqual(c[1], {"pint": 1.0 / 3})
c = ureg.get_base_units("cm", system=sysname)
self.assertAlmostEqual(c[0], 0.1283, places=3)
self.assertEqual(c[1], {"pint": 1.0 / 3})
c = ureg.get_base_units("inch**2", system=sysname)
self.assertAlmostEqual(c[0], 0.326 ** 2, places=3)
self.assertEqual(c[1], {"pint": 2.0 / 3})
c = ureg.get_base_units("cm**2", system=sysname)
self.assertAlmostEqual(c[0], 0.1283 ** 2, places=3)
self.assertEqual(c[1], {"pint": 2.0 / 3})
def test_get_compatible_units(self):
sysname = "mysys1"
ureg = UnitRegistry()
g = ureg.get_group("test-imperial")
g.add_units("inch", "yard", "pint")
c = ureg.get_compatible_units("meter", "test-imperial")
assert c == frozenset([ureg.inch, ureg.yard])
lines = ["@system %s using test-imperial" % sysname, "inch"]
ureg.System.from_lines(lines, lambda x: x)
c = ureg.get_compatible_units("meter", sysname)
assert c == frozenset([ureg.inch, ureg.yard])
def test_get_compatible_units(self):
sysname = "mysys1"
ureg = UnitRegistry()
g = ureg.get_group("test-imperial")
g.add_units("inch", "yard", "pint")
c = ureg.get_compatible_units("meter", "test-imperial")
self.assertEqual(c, frozenset([ureg.inch, ureg.yard]))
lines = ["@system %s using test-imperial" % sysname, "inch"]
s = ureg.System.from_lines(lines, lambda x: x)
c = ureg.get_compatible_units("meter", sysname)
self.assertEqual(c, frozenset([ureg.inch, ureg.yard]))
def test_get_compatible_units(self):
ureg = UnitRegistry()
g = ureg.get_group("test-imperial")
g.add_units("inch", "yard", "pint")
c = ureg.get_compatible_units("meter", "test-imperial")
assert c == frozenset([ureg.inch, ureg.yard])
def test_get_base_units_different_exponent(self):
sysname = 'mysys3'
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
c = ureg.get_compatible_units('meter', 'test-imperial')
lines = [
'@system %s using test-imperial' % sysname,
'pint:meter',
]
s = System.from_lines(lines, ureg.get_base_units, g._groups_systems)
# base_factor, destination_units
c = ureg.get_base_units('inch', system=sysname)
self.assertAlmostEqual(c[0], 0.326, places=3)
self.assertEqual(c[1], {'pint': 1. / 3})
c = ureg.get_base_units('cm', system=sysname)
self.assertAlmostEqual(c[0], 0.1283, places=3)
self.assertEqual(c[1], {'pint': 1. / 3})
c = ureg.get_base_units('inch**2', system=sysname)
self.assertAlmostEqual(c[0], 0.326**2, places=3)
self.assertEqual(c[1], {'pint': 2. / 3})
c = ureg.get_base_units('cm**2', system=sysname)
self.assertAlmostEqual(c[0], 0.1283**2, places=3)
self.assertEqual(c[1], {'pint': 2. / 3})
def test_get_compatible_units(self):
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
c = ureg.get_compatible_units('meter', 'test-imperial')
self.assertEqual(c, frozenset([ureg.inch, ureg.yard]))
def test_get_compatible_units(self):
ureg = UnitRegistry()
g = ureg.get_group("test-imperial")
g.add_units("inch", "yard", "pint")
c = ureg.get_compatible_units("meter", "test-imperial")
self.assertEqual(c, frozenset([ureg.inch, ureg.yard]))
def test_get_base_units_different_exponent(self):
sysname = 'mysys3'
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
c = ureg.get_compatible_units('meter', 'test-imperial')
lines = ['@system %s using test-imperial' % sysname,
'pint:meter',
]
s = System.from_lines(lines, ureg.get_base_units, g._groups_systems)
# base_factor, destination_units
c = ureg.get_base_units('inch', system=sysname)
self.assertAlmostEqual(c[0], 0.326, places=3)
self.assertEqual(c[1], {'pint': 1./3})
c = ureg.get_base_units('cm', system=sysname)
self.assertAlmostEqual(c[0], 0.1283, places=3)
self.assertEqual(c[1], {'pint': 1./3})
c = ureg.get_base_units('inch**2', system=sysname)
self.assertAlmostEqual(c[0], 0.326**2, places=3)
self.assertEqual(c[1], {'pint': 2./3})
c = ureg.get_base_units('cm**2', system=sysname)
self.assertAlmostEqual(c[0], 0.1283**2, places=3)
self.assertEqual(c[1], {'pint': 2./3})
def test_get_compatible_units(self):
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
c = ureg.get_compatible_units('meter', 'test-imperial')
self.assertEqual(c, frozenset([ureg.inch, ureg.yard]))
def test_get_base_units_different_exponent(self):
sysname = "mysys3"
ureg = UnitRegistry()
g = ureg.get_group("test-imperial")
g.add_units("inch", "yard", "pint")
c = ureg.get_compatible_units("meter", "test-imperial")
lines = ["@system %s using test-imperial" % sysname, "pint:meter"]
s = ureg.System.from_lines(lines, ureg.get_base_units)
ureg._systems[s.name] = s
# base_factor, destination_units
c = ureg.get_base_units("inch", system=sysname)
self.assertAlmostEqual(c[0], 0.326, places=3)
self.assertEqual(c[1], {"pint": 1.0 / 3})
c = ureg.get_base_units("cm", system=sysname)
self.assertAlmostEqual(c[0], 0.1283, places=3)
self.assertEqual(c[1], {"pint": 1.0 / 3})
c = ureg.get_base_units("inch**2", system=sysname)
self.assertAlmostEqual(c[0], 0.326 ** 2, places=3)
self.assertEqual(c[1], {"pint": 2.0 / 3})
c = ureg.get_base_units("cm**2", system=sysname)
self.assertAlmostEqual(c[0], 0.1283 ** 2, places=3)
self.assertEqual(c[1], {"pint": 2.0 / 3})
def test_get_compatible_units(self):
sysname = 'mysys1'
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
c = ureg.get_compatible_units('meter', 'test-imperial')
self.assertEqual(c, frozenset([ureg.inch, ureg.yard]))
lines = ['@system %s using test-imperial' % sysname,
'inch',
]
s = System.from_lines(lines, lambda x: x, g._groups_systems)
c = ureg.get_compatible_units('meter', sysname)
self.assertEqual(c, frozenset([ureg.inch, ureg.yard]))
def test_one_context(self):
ureg = UnitRegistry()
add_ctxs(ureg)
q = 500 * ureg.meter
s = (ureg.speed_of_light / q).to('Hz')
meter_units = ureg.get_compatible_units(ureg.meter)
hertz_units = ureg.get_compatible_units(ureg.hertz)
self.assertRaises(ValueError, q.to, 'Hz')
with ureg.context('lc'):
self.assertEqual(q.to('Hz'), s)
self.assertEqual(ureg.get_compatible_units(q), meter_units | hertz_units)
self.assertRaises(ValueError, q.to, 'Hz')
self.assertEqual(ureg.get_compatible_units(q), meter_units)
def test_get_compatible_units(self):
sysname = 'mysys1'
ureg = UnitRegistry()
g = ureg.get_group('test-imperial')
g.add_units('inch', 'yard', 'pint')
c = ureg.get_compatible_units('meter', 'test-imperial')
self.assertEqual(c, frozenset([ureg.inch, ureg.yard]))
lines = [
'@system %s using test-imperial' % sysname,
'inch',
]
s = System.from_lines(lines, lambda x: x, g._groups_systems)
c = ureg.get_compatible_units('meter', sysname)
self.assertEqual(c, frozenset([ureg.inch, ureg.yard]))
def test_issue912(self):
"""pprint.pformat() invokes sorted() on large sets and frozensets and graciously
handles TypeError, but not generic Exceptions. This test will fail if
pint.DimensionalityError stops being a subclass of TypeError.
"""
ureg = UnitRegistry()
meter_units = ureg.get_compatible_units(ureg.meter)
hertz_units = ureg.get_compatible_units(ureg.hertz)
pprint.pformat(meter_units | hertz_units)
def test_one_context(self):
ureg = UnitRegistry()
add_ctxs(ureg)
q = 500 * ureg.meter
s = (ureg.speed_of_light / q).to("Hz")
meter_units = ureg.get_compatible_units(ureg.meter)
hertz_units = ureg.get_compatible_units(ureg.hertz)
self.assertRaises(DimensionalityError, q.to, "Hz")
with ureg.context("lc"):
self.assertEqual(q.to("Hz"), s)
self.assertEqual(ureg.get_compatible_units(q),
meter_units | hertz_units)
self.assertRaises(DimensionalityError, q.to, "Hz")
self.assertEqual(ureg.get_compatible_units(q), meter_units)
def test_one_context(self):
ureg = UnitRegistry()
add_ctxs(ureg)
q = 500 * ureg.meter
s = (ureg.speed_of_light / q).to('Hz')
meter_units = ureg.get_compatible_units(ureg.meter)
hertz_units = ureg.get_compatible_units(ureg.hertz)
self.assertRaises(ValueError, q.to, 'Hz')
with ureg.context('lc'):
self.assertEqual(q.to('Hz'), s)
self.assertEqual(ureg.get_compatible_units(q),
meter_units | hertz_units)
self.assertRaises(ValueError, q.to, 'Hz')
self.assertEqual(ureg.get_compatible_units(q), meter_units)
def test_one_context(self, func_registry):
ureg = UnitRegistry()
add_ctxs(ureg)
q = 500 * ureg.meter
s = (ureg.speed_of_light / q).to("Hz")
meter_units = ureg.get_compatible_units(ureg.meter)
hertz_units = ureg.get_compatible_units(ureg.hertz)
with pytest.raises(DimensionalityError):
q.to("Hz")
with ureg.context("lc"):
assert q.to("Hz") == s
assert ureg.get_compatible_units(q) == meter_units | hertz_units
with pytest.raises(DimensionalityError):
q.to("Hz")
assert ureg.get_compatible_units(q) == meter_units
