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Commit f56392a2 authored by Raymond Hettinger's avatar Raymond Hettinger
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Namespace cleanups: 

* delete temporary globals immediately after use
* move a global into a class variable
* Rename BasicDefaultContext and ExtendedDefaultContext
  to BasicContext and ExtendedContext.
parent 5f25e10f
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Showing with 126 additions and 123 deletions
Lib/decimal.py
View file @ f56392a2
...@@ -120,7 +120,7 @@ __all__ = [ ...@@ -120,7 +120,7 @@ __all__ = [
'Decimal', 'Context', 'Decimal', 'Context',
# Contexts # Contexts
'DefaultContext', 'BasicDefaultContext', 'ExtendedDefaultContext', 'DefaultContext', 'BasicContext', 'ExtendedContext',
# Exceptions # Exceptions
'DecimalException', 'Clamped', 'InvalidOperation', 'ConversionSyntax', 'DecimalException', 'Clamped', 'InvalidOperation', 'ConversionSyntax',
...@@ -147,7 +147,6 @@ import threading ...@@ -147,7 +147,6 @@ import threading
import copy import copy
import math import math
import operator import operator
xor = operator.xor
#Exponent Range #Exponent Range
DEFAULT_MAX_EXPONENT = 999999999 DEFAULT_MAX_EXPONENT = 999999999
...@@ -162,7 +161,7 @@ ROUND_FLOOR = 'floor' ...@@ -162,7 +161,7 @@ ROUND_FLOOR = 'floor'
ROUND_UP = 'up' ROUND_UP = 'up'
ROUND_HALF_DOWN = 'half_down' 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 NEVER_ROUND = 'never' # Round in division (non-divmod), sqrt ONLY
ALWAYS_ROUND = 'always' # Every operation rounds at end. ALWAYS_ROUND = 'always' # Every operation rounds at end.
...@@ -1050,7 +1049,7 @@ class Decimal(object): ...@@ -1050,7 +1049,7 @@ class Decimal(object):
if ans: if ans:
return ans return ans
resultsign = xor(self._sign, other._sign) resultsign = operator.xor(self._sign, other._sign)
if self._isinfinity(): if self._isinfinity():
if not other: if not other:
return context._raise_error(InvalidOperation, '(+-)INF * 0') return context._raise_error(InvalidOperation, '(+-)INF * 0')
...@@ -1144,7 +1143,7 @@ class Decimal(object): ...@@ -1144,7 +1143,7 @@ class Decimal(object):
else: else:
return ans return ans
sign = xor(self._sign, other._sign) sign = operator.xor(self._sign, other._sign)
if not self and not other: if not self and not other:
if divmod: if divmod:
return context._raise_error(DivisionUndefined, '0 / 0', 1) return context._raise_error(DivisionUndefined, '0 / 0', 1)
...@@ -2113,7 +2112,7 @@ for name in rounding_functions: ...@@ -2113,7 +2112,7 @@ for name in rounding_functions:
val = globals()[globalname] val = globals()[globalname]
Decimal._pick_rounding_function[val] = name Decimal._pick_rounding_function[val] = name
DefaultLock = threading.Lock() del name, val, globalname, rounding_functions
class Context(object): class Context(object):
"""Contains the context for a Decimal instance. """Contains the context for a Decimal instance.
...@@ -2135,6 +2134,9 @@ class Context(object): ...@@ -2135,6 +2134,9 @@ class Context(object):
(Defaults to 1) (Defaults to 1)
clamp - If 1, change exponents if too high (Default 0) clamp - If 1, change exponents if too high (Default 0)
""" """
DefaultLock = threading.Lock()
def __init__(self, prec=None, rounding=None, def __init__(self, prec=None, rounding=None,
trap_enablers=None, flags=None, trap_enablers=None, flags=None,
_rounding_decision=None, _rounding_decision=None,
...@@ -2143,13 +2145,13 @@ class Context(object): ...@@ -2143,13 +2145,13 @@ class Context(object):
_ignored_flags=[]): _ignored_flags=[]):
if flags is None: if flags is None:
flags = dict.fromkeys(Signals, 0) flags = dict.fromkeys(Signals, 0)
DefaultLock.acquire() self.DefaultLock.acquire()
for name, val in locals().items(): for name, val in locals().items():
if val is None: if val is None:
setattr(self, name, copy.copy(getattr(DefaultContext, name))) setattr(self, name, copy.copy(getattr(DefaultContext, name)))
else: else:
setattr(self, name, val) setattr(self, name, val)
DefaultLock.release() self.DefaultLock.release()
del self.self del self.self
def clear_flags(self): def clear_flags(self):
...@@ -2163,6 +2165,7 @@ class Context(object): ...@@ -2163,6 +2165,7 @@ class Context(object):
self._rounding_decision, self.Emin, self.Emax, self._rounding_decision, self.Emin, self.Emax,
self.capitals, self._clamp, self._ignored_flags) self.capitals, self._clamp, self._ignored_flags)
return nc return nc
__copy__ = copy
def _raise_error(self, error, explanation = None, *args): def _raise_error(self, error, explanation = None, *args):
"""Handles an error """Handles an error
...@@ -2264,13 +2267,13 @@ class Context(object): ...@@ -2264,13 +2267,13 @@ class Context(object):
operation on the operand. Otherwise, the result is the same as using operation on the operand. Otherwise, the result is the same as using
the plus operation on the operand. the plus operation on the operand.
>>> ExtendedDefaultContext.abs(Decimal('2.1')) >>> ExtendedContext.abs(Decimal('2.1'))
Decimal("2.1") Decimal("2.1")
>>> ExtendedDefaultContext.abs(Decimal('-100')) >>> ExtendedContext.abs(Decimal('-100'))
Decimal("100") Decimal("100")
>>> ExtendedDefaultContext.abs(Decimal('101.5')) >>> ExtendedContext.abs(Decimal('101.5'))
Decimal("101.5") Decimal("101.5")
>>> ExtendedDefaultContext.abs(Decimal('-101.5')) >>> ExtendedContext.abs(Decimal('-101.5'))
Decimal("101.5") Decimal("101.5")
""" """
return a.__abs__(context=self) return a.__abs__(context=self)
...@@ -2278,9 +2281,9 @@ class Context(object): ...@@ -2278,9 +2281,9 @@ class Context(object):
def add(self, a, b): def add(self, a, b):
"""Return the sum of the two operands. """Return the sum of the two operands.
>>> ExtendedDefaultContext.add(Decimal('12'), Decimal('7.00')) >>> ExtendedContext.add(Decimal('12'), Decimal('7.00'))
Decimal("19.00") 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") Decimal("1.02E+4")
""" """
return a.__add__(b, context=self) return a.__add__(b, context=self)
...@@ -2302,17 +2305,17 @@ class Context(object): ...@@ -2302,17 +2305,17 @@ class Context(object):
subtraction: '-1' if the result is less than zero, '0' if the result is 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. 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") Decimal("-1")
>>> ExtendedDefaultContext.compare(Decimal('2.1'), Decimal('2.1')) >>> ExtendedContext.compare(Decimal('2.1'), Decimal('2.1'))
Decimal("0") Decimal("0")
>>> ExtendedDefaultContext.compare(Decimal('2.1'), Decimal('2.10')) >>> ExtendedContext.compare(Decimal('2.1'), Decimal('2.10'))
Decimal("0") Decimal("0")
>>> ExtendedDefaultContext.compare(Decimal('3'), Decimal('2.1')) >>> ExtendedContext.compare(Decimal('3'), Decimal('2.1'))
Decimal("1") Decimal("1")
>>> ExtendedDefaultContext.compare(Decimal('2.1'), Decimal('-3')) >>> ExtendedContext.compare(Decimal('2.1'), Decimal('-3'))
Decimal("1") Decimal("1")
>>> ExtendedDefaultContext.compare(Decimal('-3'), Decimal('2.1')) >>> ExtendedContext.compare(Decimal('-3'), Decimal('2.1'))
Decimal("-1") Decimal("-1")
""" """
return a.compare(b, context=self) return a.compare(b, context=self)
...@@ -2320,25 +2323,25 @@ class Context(object): ...@@ -2320,25 +2323,25 @@ class Context(object):
def divide(self, a, b): def divide(self, a, b):
"""Decimal division in a specified context. """Decimal division in a specified context.
>>> ExtendedDefaultContext.divide(Decimal('1'), Decimal('3')) >>> ExtendedContext.divide(Decimal('1'), Decimal('3'))
Decimal("0.333333333") Decimal("0.333333333")
>>> ExtendedDefaultContext.divide(Decimal('2'), Decimal('3')) >>> ExtendedContext.divide(Decimal('2'), Decimal('3'))
Decimal("0.666666667") Decimal("0.666666667")
>>> ExtendedDefaultContext.divide(Decimal('5'), Decimal('2')) >>> ExtendedContext.divide(Decimal('5'), Decimal('2'))
Decimal("2.5") Decimal("2.5")
>>> ExtendedDefaultContext.divide(Decimal('1'), Decimal('10')) >>> ExtendedContext.divide(Decimal('1'), Decimal('10'))
Decimal("0.1") Decimal("0.1")
>>> ExtendedDefaultContext.divide(Decimal('12'), Decimal('12')) >>> ExtendedContext.divide(Decimal('12'), Decimal('12'))
Decimal("1") Decimal("1")
>>> ExtendedDefaultContext.divide(Decimal('8.00'), Decimal('2')) >>> ExtendedContext.divide(Decimal('8.00'), Decimal('2'))
Decimal("4.00") Decimal("4.00")
>>> ExtendedDefaultContext.divide(Decimal('2.400'), Decimal('2.0')) >>> ExtendedContext.divide(Decimal('2.400'), Decimal('2.0'))
Decimal("1.20") Decimal("1.20")
>>> ExtendedDefaultContext.divide(Decimal('1000'), Decimal('100')) >>> ExtendedContext.divide(Decimal('1000'), Decimal('100'))
Decimal("10") Decimal("10")
>>> ExtendedDefaultContext.divide(Decimal('1000'), Decimal('1')) >>> ExtendedContext.divide(Decimal('1000'), Decimal('1'))
Decimal("1000") Decimal("1000")
>>> ExtendedDefaultContext.divide(Decimal('2.40E+6'), Decimal('2')) >>> ExtendedContext.divide(Decimal('2.40E+6'), Decimal('2'))
Decimal("1.20E+6") Decimal("1.20E+6")
""" """
return a.__div__(b, context=self) return a.__div__(b, context=self)
...@@ -2346,11 +2349,11 @@ class Context(object): ...@@ -2346,11 +2349,11 @@ class Context(object):
def divide_int(self, a, b): def divide_int(self, a, b):
"""Divides two numbers and returns the integer part of the result. """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") Decimal("0")
>>> ExtendedDefaultContext.divide_int(Decimal('10'), Decimal('3')) >>> ExtendedContext.divide_int(Decimal('10'), Decimal('3'))
Decimal("3") Decimal("3")
>>> ExtendedDefaultContext.divide_int(Decimal('1'), Decimal('0.3')) >>> ExtendedContext.divide_int(Decimal('1'), Decimal('0.3'))
Decimal("3") Decimal("3")
""" """
return a.__floordiv__(b, context=self) return a.__floordiv__(b, context=self)
...@@ -2367,11 +2370,11 @@ class Context(object): ...@@ -2367,11 +2370,11 @@ class Context(object):
is chosen as the result. Otherwise the maximum (closer to positive is chosen as the result. Otherwise the maximum (closer to positive
infinity) of the two operands is chosen as the result. infinity) of the two operands is chosen as the result.
>>> ExtendedDefaultContext.max(Decimal('3'), Decimal('2')) >>> ExtendedContext.max(Decimal('3'), Decimal('2'))
Decimal("3") Decimal("3")
>>> ExtendedDefaultContext.max(Decimal('-10'), Decimal('3')) >>> ExtendedContext.max(Decimal('-10'), Decimal('3'))
Decimal("3") Decimal("3")
>>> ExtendedDefaultContext.max(Decimal('1.0'), Decimal('1')) >>> ExtendedContext.max(Decimal('1.0'), Decimal('1'))
Decimal("1.0") Decimal("1.0")
""" """
return a.max(b, context=self) return a.max(b, context=self)
...@@ -2385,11 +2388,11 @@ class Context(object): ...@@ -2385,11 +2388,11 @@ class Context(object):
is chosen as the result. Otherwise the minimum (closer to negative is chosen as the result. Otherwise the minimum (closer to negative
infinity) of the two operands is chosen as the result. infinity) of the two operands is chosen as the result.
>>> ExtendedDefaultContext.min(Decimal('3'), Decimal('2')) >>> ExtendedContext.min(Decimal('3'), Decimal('2'))
Decimal("2") Decimal("2")
>>> ExtendedDefaultContext.min(Decimal('-10'), Decimal('3')) >>> ExtendedContext.min(Decimal('-10'), Decimal('3'))
Decimal("-10") Decimal("-10")
>>> ExtendedDefaultContext.min(Decimal('1.0'), Decimal('1')) >>> ExtendedContext.min(Decimal('1.0'), Decimal('1'))
Decimal("1.0") Decimal("1.0")
""" """
return a.min(b, context=self) return a.min(b, context=self)
...@@ -2401,9 +2404,9 @@ class Context(object): ...@@ -2401,9 +2404,9 @@ class Context(object):
operation minus(a) is calculated as subtract('0', a) where the '0' operation minus(a) is calculated as subtract('0', a) where the '0'
has the same exponent as the operand. has the same exponent as the operand.
>>> ExtendedDefaultContext.minus(Decimal('1.3')) >>> ExtendedContext.minus(Decimal('1.3'))
Decimal("-1.3") Decimal("-1.3")
>>> ExtendedDefaultContext.minus(Decimal('-1.3')) >>> ExtendedContext.minus(Decimal('-1.3'))
Decimal("1.3") Decimal("1.3")
""" """
return a.__neg__(context=self) return a.__neg__(context=self)
...@@ -2416,15 +2419,15 @@ class Context(object): ...@@ -2416,15 +2419,15 @@ class Context(object):
resulting in a number which may be as long as the sum of the lengths resulting in a number which may be as long as the sum of the lengths
of the two operands. of the two operands.
>>> ExtendedDefaultContext.multiply(Decimal('1.20'), Decimal('3')) >>> ExtendedContext.multiply(Decimal('1.20'), Decimal('3'))
Decimal("3.60") Decimal("3.60")
>>> ExtendedDefaultContext.multiply(Decimal('7'), Decimal('3')) >>> ExtendedContext.multiply(Decimal('7'), Decimal('3'))
Decimal("21") Decimal("21")
>>> ExtendedDefaultContext.multiply(Decimal('0.9'), Decimal('0.8')) >>> ExtendedContext.multiply(Decimal('0.9'), Decimal('0.8'))
Decimal("0.72") Decimal("0.72")
>>> ExtendedDefaultContext.multiply(Decimal('0.9'), Decimal('-0')) >>> ExtendedContext.multiply(Decimal('0.9'), Decimal('-0'))
Decimal("-0.0") Decimal("-0.0")
>>> ExtendedDefaultContext.multiply(Decimal('654321'), Decimal('654321')) >>> ExtendedContext.multiply(Decimal('654321'), Decimal('654321'))
Decimal("4.28135971E+11") Decimal("4.28135971E+11")
""" """
return a.__mul__(b, context=self) return a.__mul__(b, context=self)
...@@ -2435,17 +2438,17 @@ class Context(object): ...@@ -2435,17 +2438,17 @@ class Context(object):
Essentially a plus operation with all trailing zeros removed from the Essentially a plus operation with all trailing zeros removed from the
result. result.
>>> ExtendedDefaultContext.normalize(Decimal('2.1')) >>> ExtendedContext.normalize(Decimal('2.1'))
Decimal("2.1") Decimal("2.1")
>>> ExtendedDefaultContext.normalize(Decimal('-2.0')) >>> ExtendedContext.normalize(Decimal('-2.0'))
Decimal("-2") Decimal("-2")
>>> ExtendedDefaultContext.normalize(Decimal('1.200')) >>> ExtendedContext.normalize(Decimal('1.200'))
Decimal("1.2") Decimal("1.2")
>>> ExtendedDefaultContext.normalize(Decimal('-120')) >>> ExtendedContext.normalize(Decimal('-120'))
Decimal("-1.2E+2") Decimal("-1.2E+2")
>>> ExtendedDefaultContext.normalize(Decimal('120.00')) >>> ExtendedContext.normalize(Decimal('120.00'))
Decimal("1.2E+2") Decimal("1.2E+2")
>>> ExtendedDefaultContext.normalize(Decimal('0.00')) >>> ExtendedContext.normalize(Decimal('0.00'))
Decimal("0") Decimal("0")
""" """
return a.normalize(context=self) return a.normalize(context=self)
...@@ -2457,9 +2460,9 @@ class Context(object): ...@@ -2457,9 +2460,9 @@ class Context(object):
operation plus(a) is calculated as add('0', a) where the '0' operation plus(a) is calculated as add('0', a) where the '0'
has the same exponent as the operand. has the same exponent as the operand.
>>> ExtendedDefaultContext.plus(Decimal('1.3')) >>> ExtendedContext.plus(Decimal('1.3'))
Decimal("1.3") Decimal("1.3")
>>> ExtendedDefaultContext.plus(Decimal('-1.3')) >>> ExtendedContext.plus(Decimal('-1.3'))
Decimal("-1.3") Decimal("-1.3")
""" """
return a.__pos__(context=self) return a.__pos__(context=self)
...@@ -2482,33 +2485,33 @@ class Context(object): ...@@ -2482,33 +2485,33 @@ class Context(object):
division into 1, the operation is not halted at that point but division into 1, the operation is not halted at that point but
continues. continues.
>>> ExtendedDefaultContext.power(Decimal('2'), Decimal('3')) >>> ExtendedContext.power(Decimal('2'), Decimal('3'))
Decimal("8") Decimal("8")
>>> ExtendedDefaultContext.power(Decimal('2'), Decimal('-3')) >>> ExtendedContext.power(Decimal('2'), Decimal('-3'))
Decimal("0.125") Decimal("0.125")
>>> ExtendedDefaultContext.power(Decimal('1.7'), Decimal('8')) >>> ExtendedContext.power(Decimal('1.7'), Decimal('8'))
Decimal("69.7575744") Decimal("69.7575744")
>>> ExtendedDefaultContext.power(Decimal('Infinity'), Decimal('-2')) >>> ExtendedContext.power(Decimal('Infinity'), Decimal('-2'))
Decimal("0") Decimal("0")
>>> ExtendedDefaultContext.power(Decimal('Infinity'), Decimal('-1')) >>> ExtendedContext.power(Decimal('Infinity'), Decimal('-1'))
Decimal("0") Decimal("0")
>>> ExtendedDefaultContext.power(Decimal('Infinity'), Decimal('0')) >>> ExtendedContext.power(Decimal('Infinity'), Decimal('0'))
Decimal("1") Decimal("1")
>>> ExtendedDefaultContext.power(Decimal('Infinity'), Decimal('1')) >>> ExtendedContext.power(Decimal('Infinity'), Decimal('1'))
Decimal("Infinity") Decimal("Infinity")
>>> ExtendedDefaultContext.power(Decimal('Infinity'), Decimal('2')) >>> ExtendedContext.power(Decimal('Infinity'), Decimal('2'))
Decimal("Infinity") Decimal("Infinity")
>>> ExtendedDefaultContext.power(Decimal('-Infinity'), Decimal('-2')) >>> ExtendedContext.power(Decimal('-Infinity'), Decimal('-2'))
Decimal("0") Decimal("0")
>>> ExtendedDefaultContext.power(Decimal('-Infinity'), Decimal('-1')) >>> ExtendedContext.power(Decimal('-Infinity'), Decimal('-1'))
Decimal("-0") Decimal("-0")
>>> ExtendedDefaultContext.power(Decimal('-Infinity'), Decimal('0')) >>> ExtendedContext.power(Decimal('-Infinity'), Decimal('0'))
Decimal("1") Decimal("1")
>>> ExtendedDefaultContext.power(Decimal('-Infinity'), Decimal('1')) >>> ExtendedContext.power(Decimal('-Infinity'), Decimal('1'))
Decimal("-Infinity") Decimal("-Infinity")
>>> ExtendedDefaultContext.power(Decimal('-Infinity'), Decimal('2')) >>> ExtendedContext.power(Decimal('-Infinity'), Decimal('2'))
Decimal("Infinity") Decimal("Infinity")
>>> ExtendedDefaultContext.power(Decimal('0'), Decimal('0')) >>> ExtendedContext.power(Decimal('0'), Decimal('0'))
Decimal("NaN") Decimal("NaN")
""" """
return a.__pow__(b, modulo, context=self) return a.__pow__(b, modulo, context=self)
...@@ -2531,35 +2534,35 @@ class Context(object): ...@@ -2531,35 +2534,35 @@ class Context(object):
Also unlike other operations, quantize will never raise Underflow, even Also unlike other operations, quantize will never raise Underflow, even
if the result is subnormal and inexact. 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") Decimal("2.170")
>>> ExtendedDefaultContext.quantize(Decimal('2.17'), Decimal('0.01')) >>> ExtendedContext.quantize(Decimal('2.17'), Decimal('0.01'))
Decimal("2.17") Decimal("2.17")
>>> ExtendedDefaultContext.quantize(Decimal('2.17'), Decimal('0.1')) >>> ExtendedContext.quantize(Decimal('2.17'), Decimal('0.1'))
Decimal("2.2") Decimal("2.2")
>>> ExtendedDefaultContext.quantize(Decimal('2.17'), Decimal('1e+0')) >>> ExtendedContext.quantize(Decimal('2.17'), Decimal('1e+0'))
Decimal("2") Decimal("2")
>>> ExtendedDefaultContext.quantize(Decimal('2.17'), Decimal('1e+1')) >>> ExtendedContext.quantize(Decimal('2.17'), Decimal('1e+1'))
Decimal("0E+1") Decimal("0E+1")
>>> ExtendedDefaultContext.quantize(Decimal('-Inf'), Decimal('Infinity')) >>> ExtendedContext.quantize(Decimal('-Inf'), Decimal('Infinity'))
Decimal("-Infinity") Decimal("-Infinity")
>>> ExtendedDefaultContext.quantize(Decimal('2'), Decimal('Infinity')) >>> ExtendedContext.quantize(Decimal('2'), Decimal('Infinity'))
Decimal("NaN") Decimal("NaN")
>>> ExtendedDefaultContext.quantize(Decimal('-0.1'), Decimal('1')) >>> ExtendedContext.quantize(Decimal('-0.1'), Decimal('1'))
Decimal("-0") Decimal("-0")
>>> ExtendedDefaultContext.quantize(Decimal('-0'), Decimal('1e+5')) >>> ExtendedContext.quantize(Decimal('-0'), Decimal('1e+5'))
Decimal("-0E+5") Decimal("-0E+5")
>>> ExtendedDefaultContext.quantize(Decimal('+35236450.6'), Decimal('1e-2')) >>> ExtendedContext.quantize(Decimal('+35236450.6'), Decimal('1e-2'))
Decimal("NaN") Decimal("NaN")
>>> ExtendedDefaultContext.quantize(Decimal('-35236450.6'), Decimal('1e-2')) >>> ExtendedContext.quantize(Decimal('-35236450.6'), Decimal('1e-2'))
Decimal("NaN") Decimal("NaN")
>>> ExtendedDefaultContext.quantize(Decimal('217'), Decimal('1e-1')) >>> ExtendedContext.quantize(Decimal('217'), Decimal('1e-1'))
Decimal("217.0") Decimal("217.0")
>>> ExtendedDefaultContext.quantize(Decimal('217'), Decimal('1e-0')) >>> ExtendedContext.quantize(Decimal('217'), Decimal('1e-0'))
Decimal("217") Decimal("217")
>>> ExtendedDefaultContext.quantize(Decimal('217'), Decimal('1e+1')) >>> ExtendedContext.quantize(Decimal('217'), Decimal('1e+1'))
Decimal("2.2E+2") Decimal("2.2E+2")
>>> ExtendedDefaultContext.quantize(Decimal('217'), Decimal('1e+2')) >>> ExtendedContext.quantize(Decimal('217'), Decimal('1e+2'))
Decimal("2E+2") Decimal("2E+2")
""" """
return a.quantize(b, context=self) return a.quantize(b, context=self)
...@@ -2576,17 +2579,17 @@ class Context(object): ...@@ -2576,17 +2579,17 @@ class Context(object):
(that is, if integer division on the same two operands would fail, the (that is, if integer division on the same two operands would fail, the
remainder cannot be calculated). remainder cannot be calculated).
>>> ExtendedDefaultContext.remainder(Decimal('2.1'), Decimal('3')) >>> ExtendedContext.remainder(Decimal('2.1'), Decimal('3'))
Decimal("2.1") Decimal("2.1")
>>> ExtendedDefaultContext.remainder(Decimal('10'), Decimal('3')) >>> ExtendedContext.remainder(Decimal('10'), Decimal('3'))
Decimal("1") Decimal("1")
>>> ExtendedDefaultContext.remainder(Decimal('-10'), Decimal('3')) >>> ExtendedContext.remainder(Decimal('-10'), Decimal('3'))
Decimal("-1") Decimal("-1")
>>> ExtendedDefaultContext.remainder(Decimal('10.2'), Decimal('1')) >>> ExtendedContext.remainder(Decimal('10.2'), Decimal('1'))
Decimal("0.2") Decimal("0.2")
>>> ExtendedDefaultContext.remainder(Decimal('10'), Decimal('0.3')) >>> ExtendedContext.remainder(Decimal('10'), Decimal('0.3'))
Decimal("0.1") Decimal("0.1")
>>> ExtendedDefaultContext.remainder(Decimal('3.6'), Decimal('1.3')) >>> ExtendedContext.remainder(Decimal('3.6'), Decimal('1.3'))
Decimal("1.0") Decimal("1.0")
""" """
return a.__mod__(b, context=self) return a.__mod__(b, context=self)
...@@ -2601,19 +2604,19 @@ class Context(object): ...@@ -2601,19 +2604,19 @@ class Context(object):
(that is, if integer division on the same two operands would fail, the (that is, if integer division on the same two operands would fail, the
remainder cannot be calculated). remainder cannot be calculated).
>>> ExtendedDefaultContext.remainder_near(Decimal('2.1'), Decimal('3')) >>> ExtendedContext.remainder_near(Decimal('2.1'), Decimal('3'))
Decimal("-0.9") Decimal("-0.9")
>>> ExtendedDefaultContext.remainder_near(Decimal('10'), Decimal('6')) >>> ExtendedContext.remainder_near(Decimal('10'), Decimal('6'))
Decimal("-2") Decimal("-2")
>>> ExtendedDefaultContext.remainder_near(Decimal('10'), Decimal('3')) >>> ExtendedContext.remainder_near(Decimal('10'), Decimal('3'))
Decimal("1") Decimal("1")
>>> ExtendedDefaultContext.remainder_near(Decimal('-10'), Decimal('3')) >>> ExtendedContext.remainder_near(Decimal('-10'), Decimal('3'))
Decimal("-1") Decimal("-1")
>>> ExtendedDefaultContext.remainder_near(Decimal('10.2'), Decimal('1')) >>> ExtendedContext.remainder_near(Decimal('10.2'), Decimal('1'))
Decimal("0.2") Decimal("0.2")
>>> ExtendedDefaultContext.remainder_near(Decimal('10'), Decimal('0.3')) >>> ExtendedContext.remainder_near(Decimal('10'), Decimal('0.3'))
Decimal("0.1") Decimal("0.1")
>>> ExtendedDefaultContext.remainder_near(Decimal('3.6'), Decimal('1.3')) >>> ExtendedContext.remainder_near(Decimal('3.6'), Decimal('1.3'))
Decimal("-0.3") Decimal("-0.3")
""" """
return a.remainder_near(b, context=self) return a.remainder_near(b, context=self)
...@@ -2624,13 +2627,13 @@ class Context(object): ...@@ -2624,13 +2627,13 @@ class Context(object):
The result is never affected by either the sign or the coefficient of The result is never affected by either the sign or the coefficient of
either operand. either operand.
>>> ExtendedDefaultContext.same_quantum(Decimal('2.17'), Decimal('0.001')) >>> ExtendedContext.same_quantum(Decimal('2.17'), Decimal('0.001'))
False False
>>> ExtendedDefaultContext.same_quantum(Decimal('2.17'), Decimal('0.01')) >>> ExtendedContext.same_quantum(Decimal('2.17'), Decimal('0.01'))
True True
>>> ExtendedDefaultContext.same_quantum(Decimal('2.17'), Decimal('1')) >>> ExtendedContext.same_quantum(Decimal('2.17'), Decimal('1'))
False False
>>> ExtendedDefaultContext.same_quantum(Decimal('Inf'), Decimal('-Inf')) >>> ExtendedContext.same_quantum(Decimal('Inf'), Decimal('-Inf'))
True True
""" """
return a.same_quantum(b) return a.same_quantum(b)
...@@ -2641,25 +2644,25 @@ class Context(object): ...@@ -2641,25 +2644,25 @@ class Context(object):
If the result must be inexact, it is rounded using the round-half-even If the result must be inexact, it is rounded using the round-half-even
algorithm. algorithm.
>>> ExtendedDefaultContext.sqrt(Decimal('0')) >>> ExtendedContext.sqrt(Decimal('0'))
Decimal("0") Decimal("0")
>>> ExtendedDefaultContext.sqrt(Decimal('-0')) >>> ExtendedContext.sqrt(Decimal('-0'))
Decimal("-0") Decimal("-0")
>>> ExtendedDefaultContext.sqrt(Decimal('0.39')) >>> ExtendedContext.sqrt(Decimal('0.39'))
Decimal("0.624499800") Decimal("0.624499800")
>>> ExtendedDefaultContext.sqrt(Decimal('100')) >>> ExtendedContext.sqrt(Decimal('100'))
Decimal("10") Decimal("10")
>>> ExtendedDefaultContext.sqrt(Decimal('1')) >>> ExtendedContext.sqrt(Decimal('1'))
Decimal("1") Decimal("1")
>>> ExtendedDefaultContext.sqrt(Decimal('1.0')) >>> ExtendedContext.sqrt(Decimal('1.0'))
Decimal("1.0") Decimal("1.0")
>>> ExtendedDefaultContext.sqrt(Decimal('1.00')) >>> ExtendedContext.sqrt(Decimal('1.00'))
Decimal("1.0") Decimal("1.0")
>>> ExtendedDefaultContext.sqrt(Decimal('7')) >>> ExtendedContext.sqrt(Decimal('7'))
Decimal("2.64575131") Decimal("2.64575131")
>>> ExtendedDefaultContext.sqrt(Decimal('10')) >>> ExtendedContext.sqrt(Decimal('10'))
Decimal("3.16227766") Decimal("3.16227766")
>>> ExtendedDefaultContext.prec >>> ExtendedContext.prec
9 9
""" """
return a.sqrt(context=self) return a.sqrt(context=self)
...@@ -2667,11 +2670,11 @@ class Context(object): ...@@ -2667,11 +2670,11 @@ class Context(object):
def subtract(self, a, b): def subtract(self, a, b):
"""Return the sum of the two operands. """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") Decimal("0.23")
>>> ExtendedDefaultContext.subtract(Decimal('1.3'), Decimal('1.30')) >>> ExtendedContext.subtract(Decimal('1.3'), Decimal('1.30'))
Decimal("0.00") Decimal("0.00")
>>> ExtendedDefaultContext.subtract(Decimal('1.3'), Decimal('2.07')) >>> ExtendedContext.subtract(Decimal('1.3'), Decimal('2.07'))
Decimal("-0.77") Decimal("-0.77")
""" """
return a.__sub__(b, context=self) return a.__sub__(b, context=self)
...@@ -2699,21 +2702,21 @@ class Context(object): ...@@ -2699,21 +2702,21 @@ class Context(object):
of the operand as the precision setting, except that no flags will of the operand as the precision setting, except that no flags will
be set. The rounding mode is taken from the context. be set. The rounding mode is taken from the context.
>>> ExtendedDefaultContext.to_integral(Decimal('2.1')) >>> ExtendedContext.to_integral(Decimal('2.1'))
Decimal("2") Decimal("2")
>>> ExtendedDefaultContext.to_integral(Decimal('100')) >>> ExtendedContext.to_integral(Decimal('100'))
Decimal("100") Decimal("100")
>>> ExtendedDefaultContext.to_integral(Decimal('100.0')) >>> ExtendedContext.to_integral(Decimal('100.0'))
Decimal("100") Decimal("100")
>>> ExtendedDefaultContext.to_integral(Decimal('101.5')) >>> ExtendedContext.to_integral(Decimal('101.5'))
Decimal("102") Decimal("102")
>>> ExtendedDefaultContext.to_integral(Decimal('-101.5')) >>> ExtendedContext.to_integral(Decimal('-101.5'))
Decimal("-102") Decimal("-102")
>>> ExtendedDefaultContext.to_integral(Decimal('10E+5')) >>> ExtendedContext.to_integral(Decimal('10E+5'))
Decimal("1.0E+6") Decimal("1.0E+6")
>>> ExtendedDefaultContext.to_integral(Decimal('7.89E+77')) >>> ExtendedContext.to_integral(Decimal('7.89E+77'))
Decimal("7.89E+77") Decimal("7.89E+77")
>>> ExtendedDefaultContext.to_integral(Decimal('-Inf')) >>> ExtendedContext.to_integral(Decimal('-Inf'))
Decimal("-Infinity") Decimal("-Infinity")
""" """
return a.to_integral(context=self) return a.to_integral(context=self)
...@@ -2974,14 +2977,14 @@ DefaultContext = Context( ...@@ -2974,14 +2977,14 @@ DefaultContext = Context(
# contexts and be able to reproduce results from other implementations # contexts and be able to reproduce results from other implementations
# of the spec. # of the spec.
BasicDefaultContext = Context( BasicContext = Context(
prec=9, rounding=ROUND_HALF_UP, prec=9, rounding=ROUND_HALF_UP,
trap_enablers=_basic_traps, trap_enablers=_basic_traps,
flags=None, flags=None,
_rounding_decision=ALWAYS_ROUND, _rounding_decision=ALWAYS_ROUND,
) )
ExtendedDefaultContext = Context( ExtendedContext = Context(
prec=9, rounding=ROUND_HALF_EVEN, prec=9, rounding=ROUND_HALF_EVEN,
trap_enablers=dict.fromkeys(Signals, 0), trap_enablers=dict.fromkeys(Signals, 0),
flags=None, flags=None,
......
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