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Namespace cleanups:

Browse source 
* delete temporary globals immediately after use
* move a global into a class variable
* Rename BasicDefaultContext and ExtendedDefaultContext
  to BasicContext and ExtendedContext.
This commit is contained in:
Raymond Hettinger 2004-07-03 13:48:56 +00:00
parent 6ea4845822
commit 9ec3e3b6eb
1 changed files with 126 additions and 123 deletions
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249
Lib/decimal.py
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@ -120,7 +120,7 @@ __all__ = [
'Decimal', 'Context',
# Contexts
'DefaultContext', 'BasicDefaultContext', 'ExtendedDefaultContext',
'DefaultContext', 'BasicContext', 'ExtendedContext',
# Exceptions
'DecimalException', 'Clamped', 'InvalidOperation', 'ConversionSyntax',
@ -147,7 +147,6 @@ import threading
import copy
import math
import operator
xor = operator.xor
#Exponent Range
DEFAULT_MAX_EXPONENT = 999999999
@ -162,7 +161,7 @@ ROUND_FLOOR = 'floor'
ROUND_UP = 'up'
ROUND_HALF_DOWN = 'half_down'
#Rounding decision
#Rounding decision (not part of the public API)
NEVER_ROUND = 'never' # Round in division (non-divmod), sqrt ONLY
ALWAYS_ROUND = 'always' # Every operation rounds at end.
@ -1050,7 +1049,7 @@ class Decimal(object):
if ans:
return ans
resultsign = xor(self._sign, other._sign)
resultsign = operator.xor(self._sign, other._sign)
if self._isinfinity():
if not other:
return context._raise_error(InvalidOperation, '(+-)INF * 0')
@ -1144,7 +1143,7 @@ class Decimal(object):
else:
return ans
sign = xor(self._sign, other._sign)
sign = operator.xor(self._sign, other._sign)
if not self and not other:
if divmod:
return context._raise_error(DivisionUndefined, '0 / 0', 1)
@ -2113,7 +2112,7 @@ for name in rounding_functions:
val = globals()[globalname]
Decimal._pick_rounding_function[val] = name
DefaultLock = threading.Lock()
del name, val, globalname, rounding_functions
class Context(object):
"""Contains the context for a Decimal instance.
@ -2135,6 +2134,9 @@ class Context(object):
(Defaults to 1)
clamp - If 1, change exponents if too high (Default 0)
"""
DefaultLock = threading.Lock()
def __init__(self, prec=None, rounding=None,
trap_enablers=None, flags=None,
_rounding_decision=None,
@ -2143,13 +2145,13 @@ class Context(object):
_ignored_flags=[]):
if flags is None:
flags = dict.fromkeys(Signals, 0)
DefaultLock.acquire()
self.DefaultLock.acquire()
for name, val in locals().items():
if val is None:
setattr(self, name, copy.copy(getattr(DefaultContext, name)))
else:
setattr(self, name, val)
DefaultLock.release()
self.DefaultLock.release()
del self.self
def clear_flags(self):
@ -2163,6 +2165,7 @@ class Context(object):
self._rounding_decision, self.Emin, self.Emax,
self.capitals, self._clamp, self._ignored_flags)
return nc
__copy__ = copy
def _raise_error(self, error, explanation = None, *args):
"""Handles an error
@ -2264,13 +2267,13 @@ class Context(object):
operation on the operand. Otherwise, the result is the same as using
the plus operation on the operand.
>>> ExtendedDefaultContext.abs(Decimal('2.1'))
>>> ExtendedContext.abs(Decimal('2.1'))
Decimal("2.1")
>>> ExtendedDefaultContext.abs(Decimal('-100'))
>>> ExtendedContext.abs(Decimal('-100'))
Decimal("100")
>>> ExtendedDefaultContext.abs(Decimal('101.5'))
>>> ExtendedContext.abs(Decimal('101.5'))
Decimal("101.5")
>>> ExtendedDefaultContext.abs(Decimal('-101.5'))
>>> ExtendedContext.abs(Decimal('-101.5'))
Decimal("101.5")
"""
return a.__abs__(context=self)
@ -2278,9 +2281,9 @@ class Context(object):
def add(self, a, b):
"""Return the sum of the two operands.
>>> ExtendedDefaultContext.add(Decimal('12'), Decimal('7.00'))
>>> ExtendedContext.add(Decimal('12'), Decimal('7.00'))
Decimal("19.00")
>>> ExtendedDefaultContext.add(Decimal('1E+2'), Decimal('1.01E+4'))
>>> ExtendedContext.add(Decimal('1E+2'), Decimal('1.01E+4'))
Decimal("1.02E+4")
"""
return a.__add__(b, context=self)
@ -2302,17 +2305,17 @@ class Context(object):
subtraction: '-1' if the result is less than zero, '0' if the result is
zero or negative zero, or '1' if the result is greater than zero.
>>> ExtendedDefaultContext.compare(Decimal('2.1'), Decimal('3'))
>>> ExtendedContext.compare(Decimal('2.1'), Decimal('3'))
Decimal("-1")
>>> ExtendedDefaultContext.compare(Decimal('2.1'), Decimal('2.1'))
>>> ExtendedContext.compare(Decimal('2.1'), Decimal('2.1'))
Decimal("0")
>>> ExtendedDefaultContext.compare(Decimal('2.1'), Decimal('2.10'))
>>> ExtendedContext.compare(Decimal('2.1'), Decimal('2.10'))
Decimal("0")
>>> ExtendedDefaultContext.compare(Decimal('3'), Decimal('2.1'))
>>> ExtendedContext.compare(Decimal('3'), Decimal('2.1'))
Decimal("1")
>>> ExtendedDefaultContext.compare(Decimal('2.1'), Decimal('-3'))
>>> ExtendedContext.compare(Decimal('2.1'), Decimal('-3'))
Decimal("1")
>>> ExtendedDefaultContext.compare(Decimal('-3'), Decimal('2.1'))
>>> ExtendedContext.compare(Decimal('-3'), Decimal('2.1'))
Decimal("-1")
"""
return a.compare(b, context=self)
@ -2320,25 +2323,25 @@ class Context(object):
def divide(self, a, b):
"""Decimal division in a specified context.
>>> ExtendedDefaultContext.divide(Decimal('1'), Decimal('3'))
>>> ExtendedContext.divide(Decimal('1'), Decimal('3'))
Decimal("0.333333333")
>>> ExtendedDefaultContext.divide(Decimal('2'), Decimal('3'))
>>> ExtendedContext.divide(Decimal('2'), Decimal('3'))
Decimal("0.666666667")
>>> ExtendedDefaultContext.divide(Decimal('5'), Decimal('2'))
>>> ExtendedContext.divide(Decimal('5'), Decimal('2'))
Decimal("2.5")
>>> ExtendedDefaultContext.divide(Decimal('1'), Decimal('10'))
>>> ExtendedContext.divide(Decimal('1'), Decimal('10'))
Decimal("0.1")
>>> ExtendedDefaultContext.divide(Decimal('12'), Decimal('12'))
>>> ExtendedContext.divide(Decimal('12'), Decimal('12'))
Decimal("1")
>>> ExtendedDefaultContext.divide(Decimal('8.00'), Decimal('2'))
>>> ExtendedContext.divide(Decimal('8.00'), Decimal('2'))
Decimal("4.00")
>>> ExtendedDefaultContext.divide(Decimal('2.400'), Decimal('2.0'))
>>> ExtendedContext.divide(Decimal('2.400'), Decimal('2.0'))
Decimal("1.20")
>>> ExtendedDefaultContext.divide(Decimal('1000'), Decimal('100'))
>>> ExtendedContext.divide(Decimal('1000'), Decimal('100'))
Decimal("10")
>>> ExtendedDefaultContext.divide(Decimal('1000'), Decimal('1'))
>>> ExtendedContext.divide(Decimal('1000'), Decimal('1'))
Decimal("1000")
>>> ExtendedDefaultContext.divide(Decimal('2.40E+6'), Decimal('2'))
>>> ExtendedContext.divide(Decimal('2.40E+6'), Decimal('2'))
Decimal("1.20E+6")
"""
return a.__div__(b, context=self)
@ -2346,11 +2349,11 @@ class Context(object):
def divide_int(self, a, b):
"""Divides two numbers and returns the integer part of the result.
>>> ExtendedDefaultContext.divide_int(Decimal('2'), Decimal('3'))
>>> ExtendedContext.divide_int(Decimal('2'), Decimal('3'))
Decimal("0")
>>> ExtendedDefaultContext.divide_int(Decimal('10'), Decimal('3'))
>>> ExtendedContext.divide_int(Decimal('10'), Decimal('3'))
Decimal("3")
>>> ExtendedDefaultContext.divide_int(Decimal('1'), Decimal('0.3'))
>>> ExtendedContext.divide_int(Decimal('1'), Decimal('0.3'))
Decimal("3")
"""
return a.__floordiv__(b, context=self)
@ -2367,11 +2370,11 @@ class Context(object):
is chosen as the result. Otherwise the maximum (closer to positive
infinity) of the two operands is chosen as the result.
>>> ExtendedDefaultContext.max(Decimal('3'), Decimal('2'))
>>> ExtendedContext.max(Decimal('3'), Decimal('2'))
Decimal("3")
>>> ExtendedDefaultContext.max(Decimal('-10'), Decimal('3'))
>>> ExtendedContext.max(Decimal('-10'), Decimal('3'))
Decimal("3")
>>> ExtendedDefaultContext.max(Decimal('1.0'), Decimal('1'))
>>> ExtendedContext.max(Decimal('1.0'), Decimal('1'))
Decimal("1.0")
"""
return a.max(b, context=self)
@ -2385,11 +2388,11 @@ class Context(object):
is chosen as the result. Otherwise the minimum (closer to negative
infinity) of the two operands is chosen as the result.
>>> ExtendedDefaultContext.min(Decimal('3'), Decimal('2'))
>>> ExtendedContext.min(Decimal('3'), Decimal('2'))
Decimal("2")
>>> ExtendedDefaultContext.min(Decimal('-10'), Decimal('3'))
>>> ExtendedContext.min(Decimal('-10'), Decimal('3'))
Decimal("-10")
>>> ExtendedDefaultContext.min(Decimal('1.0'), Decimal('1'))
>>> ExtendedContext.min(Decimal('1.0'), Decimal('1'))
Decimal("1.0")
"""
return a.min(b, context=self)
@ -2401,9 +2404,9 @@ class Context(object):
operation minus(a) is calculated as subtract('0', a) where the '0'
has the same exponent as the operand.
>>> ExtendedDefaultContext.minus(Decimal('1.3'))
>>> ExtendedContext.minus(Decimal('1.3'))
Decimal("-1.3")
>>> ExtendedDefaultContext.minus(Decimal('-1.3'))
>>> ExtendedContext.minus(Decimal('-1.3'))
Decimal("1.3")
"""
return a.__neg__(context=self)
@ -2416,15 +2419,15 @@ class Context(object):
resulting in a number which may be as long as the sum of the lengths
of the two operands.
>>> ExtendedDefaultContext.multiply(Decimal('1.20'), Decimal('3'))
>>> ExtendedContext.multiply(Decimal('1.20'), Decimal('3'))
Decimal("3.60")
>>> ExtendedDefaultContext.multiply(Decimal('7'), Decimal('3'))
>>> ExtendedContext.multiply(Decimal('7'), Decimal('3'))
Decimal("21")
>>> ExtendedDefaultContext.multiply(Decimal('0.9'), Decimal('0.8'))
>>> ExtendedContext.multiply(Decimal('0.9'), Decimal('0.8'))
Decimal("0.72")
>>> ExtendedDefaultContext.multiply(Decimal('0.9'), Decimal('-0'))
>>> ExtendedContext.multiply(Decimal('0.9'), Decimal('-0'))
Decimal("-0.0")
>>> ExtendedDefaultContext.multiply(Decimal('654321'), Decimal('654321'))
>>> ExtendedContext.multiply(Decimal('654321'), Decimal('654321'))
Decimal("4.28135971E+11")
"""
return a.__mul__(b, context=self)
@ -2435,17 +2438,17 @@ class Context(object):
Essentially a plus operation with all trailing zeros removed from the
result.
>>> ExtendedDefaultContext.normalize(Decimal('2.1'))
>>> ExtendedContext.normalize(Decimal('2.1'))
Decimal("2.1")
>>> ExtendedDefaultContext.normalize(Decimal('-2.0'))
>>> ExtendedContext.normalize(Decimal('-2.0'))
Decimal("-2")
>>> ExtendedDefaultContext.normalize(Decimal('1.200'))
>>> ExtendedContext.normalize(Decimal('1.200'))
Decimal("1.2")
>>> ExtendedDefaultContext.normalize(Decimal('-120'))
>>> ExtendedContext.normalize(Decimal('-120'))
Decimal("-1.2E+2")
>>> ExtendedDefaultContext.normalize(Decimal('120.00'))
>>> ExtendedContext.normalize(Decimal('120.00'))
Decimal("1.2E+2")
>>> ExtendedDefaultContext.normalize(Decimal('0.00'))
>>> ExtendedContext.normalize(Decimal('0.00'))
Decimal("0")
"""
return a.normalize(context=self)
@ -2457,9 +2460,9 @@ class Context(object):
operation plus(a) is calculated as add('0', a) where the '0'
has the same exponent as the operand.
>>> ExtendedDefaultContext.plus(Decimal('1.3'))
>>> ExtendedContext.plus(Decimal('1.3'))
Decimal("1.3")
>>> ExtendedDefaultContext.plus(Decimal('-1.3'))
>>> ExtendedContext.plus(Decimal('-1.3'))
Decimal("-1.3")
"""
return a.__pos__(context=self)
@ -2482,33 +2485,33 @@ class Context(object):
division into 1, the operation is not halted at that point but
continues.
>>> ExtendedDefaultContext.power(Decimal('2'), Decimal('3'))
>>> ExtendedContext.power(Decimal('2'), Decimal('3'))
Decimal("8")
>>> ExtendedDefaultContext.power(Decimal('2'), Decimal('-3'))
>>> ExtendedContext.power(Decimal('2'), Decimal('-3'))
Decimal("0.125")
>>> ExtendedDefaultContext.power(Decimal('1.7'), Decimal('8'))
>>> ExtendedContext.power(Decimal('1.7'), Decimal('8'))
Decimal("69.7575744")
>>> ExtendedDefaultContext.power(Decimal('Infinity'), Decimal('-2'))
>>> ExtendedContext.power(Decimal('Infinity'), Decimal('-2'))
Decimal("0")
>>> ExtendedDefaultContext.power(Decimal('Infinity'), Decimal('-1'))
>>> ExtendedContext.power(Decimal('Infinity'), Decimal('-1'))
Decimal("0")
>>> ExtendedDefaultContext.power(Decimal('Infinity'), Decimal('0'))
>>> ExtendedContext.power(Decimal('Infinity'), Decimal('0'))
Decimal("1")
>>> ExtendedDefaultContext.power(Decimal('Infinity'), Decimal('1'))
>>> ExtendedContext.power(Decimal('Infinity'), Decimal('1'))
Decimal("Infinity")
>>> ExtendedDefaultContext.power(Decimal('Infinity'), Decimal('2'))
>>> ExtendedContext.power(Decimal('Infinity'), Decimal('2'))
Decimal("Infinity")
>>> ExtendedDefaultContext.power(Decimal('-Infinity'), Decimal('-2'))
>>> ExtendedContext.power(Decimal('-Infinity'), Decimal('-2'))
Decimal("0")
>>> ExtendedDefaultContext.power(Decimal('-Infinity'), Decimal('-1'))
>>> ExtendedContext.power(Decimal('-Infinity'), Decimal('-1'))
Decimal("-0")
>>> ExtendedDefaultContext.power(Decimal('-Infinity'), Decimal('0'))
>>> ExtendedContext.power(Decimal('-Infinity'), Decimal('0'))
Decimal("1")
>>> ExtendedDefaultContext.power(Decimal('-Infinity'), Decimal('1'))
>>> ExtendedContext.power(Decimal('-Infinity'), Decimal('1'))
Decimal("-Infinity")
>>> ExtendedDefaultContext.power(Decimal('-Infinity'), Decimal('2'))
>>> ExtendedContext.power(Decimal('-Infinity'), Decimal('2'))
Decimal("Infinity")
>>> ExtendedDefaultContext.power(Decimal('0'), Decimal('0'))
>>> ExtendedContext.power(Decimal('0'), Decimal('0'))
Decimal("NaN")
"""
return a.__pow__(b, modulo, context=self)
@ -2531,35 +2534,35 @@ class Context(object):
Also unlike other operations, quantize will never raise Underflow, even
if the result is subnormal and inexact.
>>> ExtendedDefaultContext.quantize(Decimal('2.17'), Decimal('0.001'))
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('0.001'))
Decimal("2.170")
>>> ExtendedDefaultContext.quantize(Decimal('2.17'), Decimal('0.01'))
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('0.01'))
Decimal("2.17")
>>> ExtendedDefaultContext.quantize(Decimal('2.17'), Decimal('0.1'))
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('0.1'))
Decimal("2.2")
>>> ExtendedDefaultContext.quantize(Decimal('2.17'), Decimal('1e+0'))
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('1e+0'))
Decimal("2")
>>> ExtendedDefaultContext.quantize(Decimal('2.17'), Decimal('1e+1'))
>>> ExtendedContext.quantize(Decimal('2.17'), Decimal('1e+1'))
Decimal("0E+1")
>>> ExtendedDefaultContext.quantize(Decimal('-Inf'), Decimal('Infinity'))
>>> ExtendedContext.quantize(Decimal('-Inf'), Decimal('Infinity'))
Decimal("-Infinity")
>>> ExtendedDefaultContext.quantize(Decimal('2'), Decimal('Infinity'))
>>> ExtendedContext.quantize(Decimal('2'), Decimal('Infinity'))
Decimal("NaN")
>>> ExtendedDefaultContext.quantize(Decimal('-0.1'), Decimal('1'))
>>> ExtendedContext.quantize(Decimal('-0.1'), Decimal('1'))
Decimal("-0")
>>> ExtendedDefaultContext.quantize(Decimal('-0'), Decimal('1e+5'))
>>> ExtendedContext.quantize(Decimal('-0'), Decimal('1e+5'))
Decimal("-0E+5")
>>> ExtendedDefaultContext.quantize(Decimal('+35236450.6'), Decimal('1e-2'))
>>> ExtendedContext.quantize(Decimal('+35236450.6'), Decimal('1e-2'))
Decimal("NaN")
>>> ExtendedDefaultContext.quantize(Decimal('-35236450.6'), Decimal('1e-2'))
>>> ExtendedContext.quantize(Decimal('-35236450.6'), Decimal('1e-2'))
Decimal("NaN")
>>> ExtendedDefaultContext.quantize(Decimal('217'), Decimal('1e-1'))
>>> ExtendedContext.quantize(Decimal('217'), Decimal('1e-1'))
Decimal("217.0")
>>> ExtendedDefaultContext.quantize(Decimal('217'), Decimal('1e-0'))
>>> ExtendedContext.quantize(Decimal('217'), Decimal('1e-0'))
Decimal("217")
>>> ExtendedDefaultContext.quantize(Decimal('217'), Decimal('1e+1'))
>>> ExtendedContext.quantize(Decimal('217'), Decimal('1e+1'))
Decimal("2.2E+2")
>>> ExtendedDefaultContext.quantize(Decimal('217'), Decimal('1e+2'))
>>> ExtendedContext.quantize(Decimal('217'), Decimal('1e+2'))
Decimal("2E+2")
"""
return a.quantize(b, context=self)
@ -2576,17 +2579,17 @@ class Context(object):
(that is, if integer division on the same two operands would fail, the
remainder cannot be calculated).
>>> ExtendedDefaultContext.remainder(Decimal('2.1'), Decimal('3'))
>>> ExtendedContext.remainder(Decimal('2.1'), Decimal('3'))
Decimal("2.1")
>>> ExtendedDefaultContext.remainder(Decimal('10'), Decimal('3'))
>>> ExtendedContext.remainder(Decimal('10'), Decimal('3'))
Decimal("1")
>>> ExtendedDefaultContext.remainder(Decimal('-10'), Decimal('3'))
>>> ExtendedContext.remainder(Decimal('-10'), Decimal('3'))
Decimal("-1")
>>> ExtendedDefaultContext.remainder(Decimal('10.2'), Decimal('1'))
>>> ExtendedContext.remainder(Decimal('10.2'), Decimal('1'))
Decimal("0.2")
>>> ExtendedDefaultContext.remainder(Decimal('10'), Decimal('0.3'))
>>> ExtendedContext.remainder(Decimal('10'), Decimal('0.3'))
Decimal("0.1")
>>> ExtendedDefaultContext.remainder(Decimal('3.6'), Decimal('1.3'))
>>> ExtendedContext.remainder(Decimal('3.6'), Decimal('1.3'))
Decimal("1.0")
"""
return a.__mod__(b, context=self)
@ -2601,19 +2604,19 @@ class Context(object):
(that is, if integer division on the same two operands would fail, the
remainder cannot be calculated).
>>> ExtendedDefaultContext.remainder_near(Decimal('2.1'), Decimal('3'))
>>> ExtendedContext.remainder_near(Decimal('2.1'), Decimal('3'))
Decimal("-0.9")
>>> ExtendedDefaultContext.remainder_near(Decimal('10'), Decimal('6'))
>>> ExtendedContext.remainder_near(Decimal('10'), Decimal('6'))
Decimal("-2")
>>> ExtendedDefaultContext.remainder_near(Decimal('10'), Decimal('3'))
>>> ExtendedContext.remainder_near(Decimal('10'), Decimal('3'))
Decimal("1")
>>> ExtendedDefaultContext.remainder_near(Decimal('-10'), Decimal('3'))
>>> ExtendedContext.remainder_near(Decimal('-10'), Decimal('3'))
Decimal("-1")
>>> ExtendedDefaultContext.remainder_near(Decimal('10.2'), Decimal('1'))
>>> ExtendedContext.remainder_near(Decimal('10.2'), Decimal('1'))
Decimal("0.2")
>>> ExtendedDefaultContext.remainder_near(Decimal('10'), Decimal('0.3'))
>>> ExtendedContext.remainder_near(Decimal('10'), Decimal('0.3'))
Decimal("0.1")
>>> ExtendedDefaultContext.remainder_near(Decimal('3.6'), Decimal('1.3'))
>>> ExtendedContext.remainder_near(Decimal('3.6'), Decimal('1.3'))
Decimal("-0.3")
"""
return a.remainder_near(b, context=self)
@ -2624,13 +2627,13 @@ class Context(object):
The result is never affected by either the sign or the coefficient of
either operand.
>>> ExtendedDefaultContext.same_quantum(Decimal('2.17'), Decimal('0.001'))
>>> ExtendedContext.same_quantum(Decimal('2.17'), Decimal('0.001'))
False
>>> ExtendedDefaultContext.same_quantum(Decimal('2.17'), Decimal('0.01'))
>>> ExtendedContext.same_quantum(Decimal('2.17'), Decimal('0.01'))
True
>>> ExtendedDefaultContext.same_quantum(Decimal('2.17'), Decimal('1'))
>>> ExtendedContext.same_quantum(Decimal('2.17'), Decimal('1'))
False
>>> ExtendedDefaultContext.same_quantum(Decimal('Inf'), Decimal('-Inf'))
>>> ExtendedContext.same_quantum(Decimal('Inf'), Decimal('-Inf'))
True
"""
return a.same_quantum(b)
@ -2641,25 +2644,25 @@ class Context(object):
If the result must be inexact, it is rounded using the round-half-even
algorithm.
>>> ExtendedDefaultContext.sqrt(Decimal('0'))
>>> ExtendedContext.sqrt(Decimal('0'))
Decimal("0")
>>> ExtendedDefaultContext.sqrt(Decimal('-0'))
>>> ExtendedContext.sqrt(Decimal('-0'))
Decimal("-0")
>>> ExtendedDefaultContext.sqrt(Decimal('0.39'))
>>> ExtendedContext.sqrt(Decimal('0.39'))
Decimal("0.624499800")
>>> ExtendedDefaultContext.sqrt(Decimal('100'))
>>> ExtendedContext.sqrt(Decimal('100'))
Decimal("10")
>>> ExtendedDefaultContext.sqrt(Decimal('1'))
>>> ExtendedContext.sqrt(Decimal('1'))
Decimal("1")
>>> ExtendedDefaultContext.sqrt(Decimal('1.0'))
>>> ExtendedContext.sqrt(Decimal('1.0'))
Decimal("1.0")
>>> ExtendedDefaultContext.sqrt(Decimal('1.00'))
>>> ExtendedContext.sqrt(Decimal('1.00'))
Decimal("1.0")
>>> ExtendedDefaultContext.sqrt(Decimal('7'))
>>> ExtendedContext.sqrt(Decimal('7'))
Decimal("2.64575131")
>>> ExtendedDefaultContext.sqrt(Decimal('10'))
>>> ExtendedContext.sqrt(Decimal('10'))
Decimal("3.16227766")
>>> ExtendedDefaultContext.prec
>>> ExtendedContext.prec
9
"""
return a.sqrt(context=self)
@ -2667,11 +2670,11 @@ class Context(object):
def subtract(self, a, b):
"""Return the sum of the two operands.
>>> ExtendedDefaultContext.subtract(Decimal('1.3'), Decimal('1.07'))
>>> ExtendedContext.subtract(Decimal('1.3'), Decimal('1.07'))
Decimal("0.23")
>>> ExtendedDefaultContext.subtract(Decimal('1.3'), Decimal('1.30'))
>>> ExtendedContext.subtract(Decimal('1.3'), Decimal('1.30'))
Decimal("0.00")
>>> ExtendedDefaultContext.subtract(Decimal('1.3'), Decimal('2.07'))
>>> ExtendedContext.subtract(Decimal('1.3'), Decimal('2.07'))
Decimal("-0.77")
"""
return a.__sub__(b, context=self)
@ -2699,21 +2702,21 @@ class Context(object):
of the operand as the precision setting, except that no flags will
be set. The rounding mode is taken from the context.
>>> ExtendedDefaultContext.to_integral(Decimal('2.1'))
>>> ExtendedContext.to_integral(Decimal('2.1'))
Decimal("2")
>>> ExtendedDefaultContext.to_integral(Decimal('100'))
>>> ExtendedContext.to_integral(Decimal('100'))
Decimal("100")
>>> ExtendedDefaultContext.to_integral(Decimal('100.0'))
>>> ExtendedContext.to_integral(Decimal('100.0'))
Decimal("100")
>>> ExtendedDefaultContext.to_integral(Decimal('101.5'))
>>> ExtendedContext.to_integral(Decimal('101.5'))
Decimal("102")
>>> ExtendedDefaultContext.to_integral(Decimal('-101.5'))
>>> ExtendedContext.to_integral(Decimal('-101.5'))
Decimal("-102")
>>> ExtendedDefaultContext.to_integral(Decimal('10E+5'))
>>> ExtendedContext.to_integral(Decimal('10E+5'))
Decimal("1.0E+6")
>>> ExtendedDefaultContext.to_integral(Decimal('7.89E+77'))
>>> ExtendedContext.to_integral(Decimal('7.89E+77'))
Decimal("7.89E+77")
>>> ExtendedDefaultContext.to_integral(Decimal('-Inf'))
>>> ExtendedContext.to_integral(Decimal('-Inf'))
Decimal("-Infinity")
"""
return a.to_integral(context=self)
@ -2974,14 +2977,14 @@ DefaultContext = Context(
# contexts and be able to reproduce results from other implementations
# of the spec.
BasicDefaultContext = Context(
BasicContext = Context(
prec=9, rounding=ROUND_HALF_UP,
trap_enablers=_basic_traps,
flags=None,
_rounding_decision=ALWAYS_ROUND,
)
ExtendedDefaultContext = Context(
ExtendedContext = Context(
prec=9, rounding=ROUND_HALF_EVEN,
trap_enablers=dict.fromkeys(Signals, 0),
flags=None,