def testExceptions(self):
"""
Test exceptions.
"""
with self.assertRaises(BasesError):
Radices.from_rational(Fraction(1, 2), 0)
with self.assertRaises(BasesError):
Radices.from_rational(Fraction(1, 2), 2, precision=-1)
def test_exceptions(self):
"""
Test exceptions.
"""
with self.assertRaises(BasesError):
Radices.from_rational(Fraction(1, 2), 0)
with self.assertRaises(BasesError):
Radices.from_rational(Fraction(1, 2), 2, -1)
def testInverses(self, value, to_base):
"""
Test that functions are inverses of each other.
"""
(result, relation) = Radices.from_rational(value, to_base)
assert result.sign in (0, 1) or value < 0
assert relation == 0
assert result.as_rational() == value
def test_inverses(self, value, to_base):
"""
Test that functions are inverses of each other.
"""
(result, relation) = Radices.from_rational(value, to_base)
self.assertTrue(result.sign in (0, 1) or value < 0)
self.assertEqual(relation, 0)
self.assertEqual(result.as_rational(), value)
def testRoundingConversion(
self,
value,
base,
precision,
method,
expand
):
"""
Test that converting and then rounding is the same as converting
with rounding.
"""
# pylint: disable=too-many-arguments
(rounded, rel) = \
Radices.from_rational(
value,
base,
precision=precision,
method=method,
expand_repeating=expand
)
(unrounded, urel) = Radices.from_rational(value, base)
assert urel == 0
(frounded, frel) = unrounded.rounded(precision, method)
if expand:
assert frounded == rounded
assert rel == frel
rounded_value = rounded.as_rational()
if rounded_value > value:
assert rel > 0 and rel < 1
elif rounded_value < value:
assert rel < 0 and rel > -1
else:
assert rel == 0
def test_rounding_conversion(self, value, base, precision, method):
"""
Test that converting and then rounding is the same as converting
with rounding.
"""
(rounded, rel) = Radices.from_rational(value, base, precision, method)
(unrounded, urel) = Radices.from_rational(value, base)
self.assertEqual(urel, 0)
(frounded, frel) = unrounded.rounded(precision, method)
self.assertEqual(frounded, rounded)
self.assertEqual(rel, frel)
rounded_value = rounded.as_rational()
if rounded_value > value:
self.assertEqual(rel, 1)
elif rounded_value < value:
self.assertEqual(rel, -1)
else:
self.assertEqual(rel, 0)
def main():
ratio = Fraction(1024, 1000)
exponents = range(0, 9)
increases = [ratio**exp - 1 for exp in exponents]
percentages = [100 * x for x in increases]
radices = [Radices.from_rational(x, 10, 2)[0] for x in percentages]
rationals = [x.as_rational() for x in radices]
percent_values = \
[Decimal(x.numerator)/Decimal(x.denominator) for x in rationals]
plt.title('Percent Difference between Values in SI and IEC Units')
plt.xticks(exponents, ['B', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y'])
plt.ylabel("Percent Increase: (SI - IEC)/IEC")
plt.xlabel("Unit Size")
plt.plot(exponents, percent_values)
plt.show()
def main():
ratio = Fraction(1024, 1000)
exponents = range(0, 9)
increases = [ratio ** exp - 1 for exp in exponents]
percentages = [100 * x for x in increases]
radices = [Radices.from_rational(x, 10, 2)[0] for x in percentages]
rationals = [x.as_rational() for x in radices]
percent_values = \
[Decimal(x.numerator)/Decimal(x.denominator) for x in rationals]
plt.title('Percent Difference between Values in SI and IEC Units')
plt.xticks(exponents, ['B', 'K', 'M', 'G', 'T', 'P', 'E', 'Z', 'Y'])
plt.ylabel("Percent Increase: (SI - IEC)/IEC")
plt.xlabel("Unit Size")
plt.plot(exponents, percent_values)
plt.show()
