def test_decimal():
if sys.version_info >= (3, ):
# Check whether the _decimal package was built successfully
import _decimal as decimal
else:
import decimal
decimal.getcontext().prec = 6
print("1/7 =", decimal.Decimal(1) / decimal.Decimal(7))
decimal.getcontext().prec = 40
print("1/7 =", decimal.Decimal(1) / decimal.Decimal(7))
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
try:
from datetime import timezone as timezone_cls
except:
timezone_cls = timezone
try:
from base64 import encodebytes, decodebytes
except:
from base64 import encodestring as encodebytes, decodestring as decodebytes
try:
import _decimal
except:
import decimal as _decimal
default_decimal_context = _decimal.getcontext()
_str2decimal = default_decimal_context.create_decimal
_decimal2str = default_decimal_context.to_eng_string
from _weakref import proxy as _proxy
# ATOMIC = 1
# DICT = 2
# LIST = 3
# TUPLE = 4
# COMPLEX = 5
# END = 6
# REFERENCE = 7
# LABEL = 8
# ATTRIBUTE = 9
# KEY = 10
count = loc + len(recur_list)
pivot = count
continue
recur_list.append(data_list[count])
recurring = max(recurring, len(recur_list))
else:
break
count += 1
return recurring
if __name__ == '__main__':
cal_time = time.time()
limit = 1000
count = 3
longest_recur = 0
value = 0
getcontext().prec = 2000
while count < limit:
remainder = str(Decimal(1) / Decimal(count))
data_list = list(remainder)
data_list = data_list[2:]
tmp_val = get_recurring(data_list)
if tmp_val > longest_recur:
longest_recur = tmp_val
value = count
count += 2
print(
"the value of d < 1000 for which 1/d contains the longest recurring cycle in its decimal fraction part is %d"
% value)
print("calculation time is %f" % (time.time() - cal_time))
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
'''
Create two classes that model a rectangle and a circle. The rectangle class should
be constructed by length and width while the circle class should be constructed by
radius.
Write methods in the appropriate class so that you can calculate the area (of the rectangle and circle),
perimeter (of the rectangle) and circumference of the circle.
'''
import math
from _decimal import getcontext, Decimal
getcontext().prec = 4
pi = Decimal(math.pi)
class Rectangle():
"""creating class rectabgle"""
def __init__(self, length, width):
self.length = length
self.width = width
def __str__(self):
return f"this is a rectangle with a width {self.width} and length {self.length}"
def area(self):
"""method to calculate area"""
area = self.length * self.width
return area
def perim(self):
"""method to calculate perimeter"""
perim = self.width * self.length * 2
try:
from datetime import timezone as timezone_cls
except:
timezone_cls = timezone
try:
from base64 import encodebytes, decodebytes
except:
from base64 import encodestring as encodebytes, decodestring as decodebytes
try:
import _decimal
except:
import decimal as _decimal
default_decimal_context = _decimal.getcontext()
_str2decimal = default_decimal_context.create_decimal
_decimal2str = default_decimal_context.to_eng_string
from _weakref import proxy as _proxy
# ATOMIC = 1
# DICT = 2
# LIST = 3
# TUPLE = 4
# COMPLEX = 5
# END = 6
# REFERENCE = 7
# LABEL = 8
# ATTRIBUTE = 9
# KEY = 10