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# test math.isclose (appeared in Python 3.5)
try:
from math import isclose
except ImportError:
print("SKIP")
raise SystemExit
def test(a, b, **kwargs):
print(isclose(a, b, **kwargs))
def test_combinations(a, b, **kwargs):
test(a, a, **kwargs)
test(a, b, **kwargs)
test(b, a, **kwargs)
test(b, b, **kwargs)
# Special numbers
test_combinations(float('nan'), 1)
test_combinations(float('inf'), 1)
test_combinations(float('-inf'), 1)
# Equality
test(1.0, 1.0, rel_tol=0.0, abs_tol=0.0)
test(2.35e-100, 2.35e-100, rel_tol=0.0, abs_tol=0.0)
test(2.1234e100, 2.1234e100, rel_tol=0.0, abs_tol=0.0)
# Relative tolerance
test(1000.0, 1001.0, rel_tol=1e-3)
test(1000.0, 1001.0, rel_tol=1e-4)
test(1000, 1001, rel_tol=1e-3)
test(1000, 1001, rel_tol=1e-4)
test_combinations(0, 1, rel_tol=1.0)
# Absolute tolerance
test(0.0, 1e-10, abs_tol=1e-10, rel_tol=0.1)
test(0.0, 1e-10, abs_tol=0.0, rel_tol=0.1)
# Bad parameters
try:
isclose(0, 0, abs_tol=-1)
except ValueError:
print('ValueError')
try:
isclose(0, 0, rel_tol=-1)
except ValueError:
print('ValueError')
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