本文整理汇总了Python中pint.context.Context类的典型用法代码示例。如果您正苦于以下问题：Python Context类的具体用法？Python Context怎么用？Python Context使用的例子？那么, 这里精选的类代码示例或许可以为您提供帮助。
在下文中一共展示了Context类的12个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的Python代码示例。
示例1: test_parse_simple
def test_parse_simple(self):
a = Context.__keytransform__(UnitsContainer({'[time]': -1}), UnitsContainer({'[length]': 1}))
b = Context.__keytransform__(UnitsContainer({'[length]': 1}), UnitsContainer({'[time]': -1}))
s = ['@context longcontextname',
'[length] -> 1 / [time]: c / value',
'1 / [time] -> [length]: c / value']
c = Context.from_lines(s)
self.assertEqual(c.name, 'longcontextname')
self.assertEqual(c.aliases, ())
self.assertEqual(c.defaults, {})
self.assertEqual(set(c.funcs.keys()), set((a, b)))
self._test_ctx(c)
s = ['@context longcontextname = lc',
'[length] <-> 1 / [time]: c / value']
c = Context.from_lines(s)
self.assertEqual(c.name, 'longcontextname')
self.assertEqual(c.aliases, ('lc', ))
self.assertEqual(c.defaults, {})
self.assertEqual(set(c.funcs.keys()), set((a, b)))
self._test_ctx(c)
s = ['@context longcontextname = lc = lcn',
'[length] <-> 1 / [time]: c / value']
c = Context.from_lines(s)
self.assertEqual(c.name, 'longcontextname')
self.assertEqual(c.aliases, ('lc', 'lcn', ))
self.assertEqual(c.defaults, {})
self.assertEqual(set(c.funcs.keys()), set((a, b)))
self._test_ctx(c)示例2: test_parse_simple
def test_parse_simple(self):
a = Context.__keytransform__(UnitsContainer({"[time]": -1}), UnitsContainer({"[length]": 1}))
b = Context.__keytransform__(UnitsContainer({"[length]": 1}), UnitsContainer({"[time]": -1}))
s = ["@context longcontextname", "[length] -> 1 / [time]: c / value", "1 / [time] -> [length]: c / value"]
c = Context.from_lines(s)
self.assertEqual(c.name, "longcontextname")
self.assertEqual(c.aliases, ())
self.assertEqual(c.defaults, {})
self.assertEqual(set(c.funcs.keys()), set((a, b)))
self._test_ctx(c)
s = ["@context longcontextname = lc", "[length] <-> 1 / [time]: c / value"]
c = Context.from_lines(s)
self.assertEqual(c.name, "longcontextname")
self.assertEqual(c.aliases, ("lc",))
self.assertEqual(c.defaults, {})
self.assertEqual(set(c.funcs.keys()), set((a, b)))
self._test_ctx(c)
s = ["@context longcontextname = lc = lcn", "[length] <-> 1 / [time]: c / value"]
c = Context.from_lines(s)
self.assertEqual(c.name, "longcontextname")
self.assertEqual(c.aliases, ("lc", "lcn"))
self.assertEqual(c.defaults, {})
self.assertEqual(set(c.funcs.keys()), set((a, b)))
self._test_ctx(c)示例3: test_parse_define
def test_parse_define(self):
a = Context.__keytransform__(UnitsContainer({"[time]": -1}), UnitsContainer({"[length]": 1.0}))
b = Context.__keytransform__(UnitsContainer({"[length]": 1}), UnitsContainer({"[time]": -1.0}))
s = ["@context longcontextname", "[length] <-> 1 / [time]: c / value"]
c = Context.from_lines(s)
self.assertEqual(c.defaults, {})
self.assertEqual(set(c.funcs.keys()), set((a, b)))
self._test_ctx(c)示例4: test_defined
def test_defined(self):
ureg = self.ureg
with ureg.context("sp"):
pass
a = Context.__keytransform__(UnitsContainer({"[time]": -1.0}), UnitsContainer({"[length]": 1.0}))
b = Context.__keytransform__(UnitsContainer({"[length]": 1.0}), UnitsContainer({"[time]": -1.0}))
self.assertIn(a, ureg._contexts["sp"].funcs)
self.assertIn(b, ureg._contexts["sp"].funcs)
with ureg.context("sp"):
self.assertIn(a, ureg._active_ctx)
self.assertIn(b, ureg._active_ctx)示例5: test_defined
def test_defined(self):
ureg = self.ureg
with ureg.context('sp'):
pass
a = Context.__keytransform__(UnitsContainer({'[time]': -1.}), UnitsContainer({'[length]': 1.}))
b = Context.__keytransform__(UnitsContainer({'[length]': 1.}), UnitsContainer({'[time]': -1.}))
self.assertIn(a, ureg._contexts['sp'].funcs)
self.assertIn(b, ureg._contexts['sp'].funcs)
with ureg.context('sp'):
self.assertIn(a, ureg._active_ctx)
self.assertIn(b, ureg._active_ctx)示例6: test_parse_auto_inverse
def test_parse_auto_inverse(self):
a = Context.__keytransform__(UnitsContainer({'[time]': -1.}), UnitsContainer({'[length]': 1.}))
b = Context.__keytransform__(UnitsContainer({'[length]': 1.}), UnitsContainer({'[time]': -1.}))
s = ['@context longcontextname',
'[length] <-> 1 / [time]: c / value']
c = Context.from_lines(s)
self.assertEqual(c.defaults, {})
self.assertEqual(set(c.funcs.keys()), set((a, b)))
self._test_ctx(c)示例7: test_parse_parameterized
def test_parse_parameterized(self):
a = Context.__keytransform__(UnitsContainer({"[time]": -1.0}), UnitsContainer({"[length]": 1.0}))
b = Context.__keytransform__(UnitsContainer({"[length]": 1.0}), UnitsContainer({"[time]": -1.0}))
s = ["@context(n=1) longcontextname", "[length] <-> 1 / [time]: n * c / value"]
c = Context.from_lines(s)
self.assertEqual(c.defaults, {"n": 1})
self.assertEqual(set(c.funcs.keys()), set((a, b)))
self._test_ctx(c)
# If the variable is not present in the definition, then raise an error
s = ["@context(n=1) longcontextname", "[length] <-> 1 / [time]: c / value"]
self.assertRaises(ValueError, Context.from_lines, s)示例8: test_parse_parameterized
def test_parse_parameterized(self):
a = Context.__keytransform__(UnitsContainer({'[time]': -1.}), UnitsContainer({'[length]': 1.}))
b = Context.__keytransform__(UnitsContainer({'[length]': 1.}), UnitsContainer({'[time]': -1.}))
s = ['@context(n=1) longcontextname',
'[length] <-> 1 / [time]: n * c / value']
c = Context.from_lines(s)
self.assertEqual(c.defaults, {'n': 1})
self.assertEqual(set(c.funcs.keys()), set((a, b)))
self._test_ctx(c)
s = ['@context(n=1, bla=2) longcontextname',
'[length] <-> 1 / [time]: n * c / value / bla']
c = Context.from_lines(s)
self.assertEqual(c.defaults, {'n': 1, 'bla': 2})
self.assertEqual(set(c.funcs.keys()), set((a, b)))
# If the variable is not present in the definition, then raise an error
s = ['@context(n=1) longcontextname',
'[length] <-> 1 / [time]: c / value']
self.assertRaises(ValueError, Context.from_lines, s)示例9: add_arg_ctxs
def add_arg_ctxs(ureg):
a, b = UnitsContainer({"[length]": 1}), UnitsContainer({"[time]": -1})
d = Context("lc")
d.add_transformation(a, b, lambda ureg, x, n: ureg.speed_of_light / x / n)
d.add_transformation(b, a, lambda ureg, x, n: ureg.speed_of_light / x / n)
ureg.add_context(d)
a, b = UnitsContainer({"[length]": 1}), UnitsContainer({"[current]": -1})
d = Context("ab")
d.add_transformation(a, b, lambda ureg, x: 1 / x)
d.add_transformation(b, a, lambda ureg, x: 1 / x)
ureg.add_context(d)示例10: test_spectroscopy
def test_spectroscopy(self):
ureg = self.ureg
eq = (532.0 * ureg.nm, 563.5 * ureg.terahertz, 2.33053 * ureg.eV)
with ureg.context("sp"):
from pint.util import find_shortest_path
for a, b in itertools.product(eq, eq):
for x in range(2):
if x == 1:
a = a.to_base_units()
b = b.to_base_units()
da, db = Context.__keytransform__(a.dimensionality, b.dimensionality)
p = find_shortest_path(ureg._active_ctx.graph, da, db)
self.assertTrue(p)
msg = "{0} <-> {1}".format(a, b)
# assertAlmostEqualRelError converts second to first
self.assertQuantityAlmostEqual(b, a, rtol=0.01, msg=msg)
for a, b in itertools.product(eq, eq):
self.assertQuantityAlmostEqual(a.to(b.units, "sp"), b, rtol=0.01)示例11: add_sharedargdef_ctxs
def add_sharedargdef_ctxs(ureg):
a, b = UnitsContainer({"[length]": 1}), UnitsContainer({"[time]": -1})
d = Context("lc", defaults=dict(n=1))
assert d.defaults == dict(n=1)
d.add_transformation(a, b, lambda ureg, x, n: ureg.speed_of_light / x / n)
d.add_transformation(b, a, lambda ureg, x, n: ureg.speed_of_light / x / n)
ureg.add_context(d)
a, b = UnitsContainer({"[length]": 1}), UnitsContainer({"[current]": 1})
d = Context("ab", defaults=dict(n=0))
d.add_transformation(a, b, lambda ureg, x, n: ureg.ampere * ureg.meter * n / x)
d.add_transformation(b, a, lambda ureg, x, n: ureg.ampere * ureg.meter * n / x)
ureg.add_context(d)示例12: add_argdef_ctxs
def add_argdef_ctxs(ureg):
a, b = UnitsContainer({'[length]': 1}), UnitsContainer({'[time]': -1})
d = Context('lc', defaults=dict(n=1))
assert d.defaults == dict(n=1)
d.add_transformation(a, b, lambda ureg, x, n: ureg.speed_of_light / x / n)
d.add_transformation(b, a, lambda ureg, x, n: ureg.speed_of_light / x / n)
ureg.add_context(d)
a, b = UnitsContainer({'[length]': 1}), UnitsContainer({'[current]': 1})
d = Context('ab')
d.add_transformation(a, b, lambda ureg, x: ureg.ampere * ureg.meter / x)
d.add_transformation(b, a, lambda ureg, x: ureg.ampere * ureg.meter / x)
ureg.add_context(d)