class TestCalc:
getcontext().prec = 10
@pytest.mark.parametrize("data", addatas, ids=addids)
def check_add(self, data, calcu_m):
c = Decimal(str(data["a"])) + Decimal(str(data["b"]))
assert c == Decimal(str(data["expect"]))
@pytest.mark.parametrize("data", subdatas, ids=subids)
def check_sub(self, data):
c = Decimal(str(data["a"])) - Decimal(str(data["b"]))
assert c == Decimal(str(data["expect"]))
@pytest.mark.parametrize("data", multdatas, ids=multids)
def test_mult(self, data):
c = Decimal(str(data["a"])) * Decimal(str(data["b"]))
assert c == Decimal(str(data["expect"]))
@pytest.mark.parametrize("data", divdatas, ids=divids)
def test_div(self, data):
try:
c = Decimal(str(data["a"])) / Decimal(str(data["b"]))
assert c == Decimal(str(data["expect"]))
except Exception as e:
print(e)
raise e
def __init__(self, c_ctx=None, p_ctx=None):
"""Initialization is from the C context"""
self.c = C.getcontext() if c_ctx is None else c_ctx
self.p = P.getcontext() if p_ctx is None else p_ctx
self.p.prec = self.c.prec
self.p.Emin = self.c.Emin
self.p.Emax = self.c.Emax
self.p.rounding = self.c.rounding
self.p.capitals = self.c.capitals
self.settraps([sig for sig in self.c.traps if self.c.traps[sig]])
self.setstatus([sig for sig in self.c.flags if self.c.flags[sig]])
self.p.clamp = self.c.clamp
def stable(b, prec):
def to_decimal(b):
for m, n in metallic_ratio(b):
yield Decimal(m) / Decimal(n)
getcontext().prec = prec
last = 0
for i, x in zip(count(), to_decimal(b)):
if x == last:
print(f"after {i} iterations:\n\t{x}")
break
last = x
def update_event(self, inp=-1):
self.set_output_val(0, _pydecimal.getcontext())
print("\n# ======================================================================")
print("# Calculating pi, 10000 iterations")
print("# ======================================================================\n")
to_benchmark = [pi_float, pi_decimal]
if C is not None:
to_benchmark.insert(1, pi_cdecimal)
for prec in [9, 19]:
print("\nPrecision: %d decimal digits\n" % prec)
for func in to_benchmark:
start = time.time()
if C is not None:
C.getcontext().prec = prec
P.getcontext().prec = prec
for i in range(10000):
x = func()
print("%s:" % func.__name__.replace("pi_", ""))
print("result: %s" % str(x))
print("time: %fs\n" % (time.time()-start))
print("\n# ======================================================================")
print("# Factorial")
print("# ======================================================================\n")
if C is not None:
c = C.getcontext()
c.prec = C.MAX_PREC
c.Emax = C.MAX_EMAX