From: Raymond Hettinger Date: Thu, 8 Jul 2004 00:49:18 +0000 (+0000) Subject: Tim gets his default traps. X-Git-Tag: v2.4a1~19 X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=bd7f76dd04780304c397323ae994092ce759d5a2;p=python Tim gets his default traps. --- diff --git a/Lib/decimal.py b/Lib/decimal.py index 93a5e344d6..4e5cbbb5c8 100644 --- a/Lib/decimal.py +++ b/Lib/decimal.py @@ -31,7 +31,7 @@ of the expected Decimal("0.00") returned by decimal floating point). Here are some examples of using the decimal module: >>> from decimal import * ->>> getcontext().prec=9 +>>> setcontext(ExtendedContext) >>> Decimal(0) Decimal("0") >>> Decimal("1") @@ -405,8 +405,8 @@ if hasattr(threading.currentThread(), '__decimal_context__'): def setcontext(context): """Set this thread's context to context.""" - if context == DefaultContext: - context = Context() + if context in (DefaultContext, BasicContext, ExtendedContext): + context = context.copy() threading.currentThread().__decimal_context__ = context def getcontext(): @@ -2960,28 +2960,30 @@ def _isnan(num): ##### Setup Specific Contexts ################################ -_basic_traps = dict.fromkeys(Signals, 1) -_basic_traps.update({Inexact:0, Rounded:0, Subnormal:0}) - # The default context prototype used by Context() # Is mutable, so than new contexts can have different default values +_default_traps = dict.fromkeys(Signals, 0) +_default_traps.update({DivisionByZero:1, Overflow:1, InvalidOperation:1}) + DefaultContext = Context( prec=28, rounding=ROUND_HALF_EVEN, - trap_enablers=dict.fromkeys(Signals, 0), + trap_enablers=_default_traps, flags=None, _rounding_decision=ALWAYS_ROUND, Emax=DEFAULT_MAX_EXPONENT, Emin=DEFAULT_MIN_EXPONENT, capitals=1 ) -DefaultContext.trap_enablers.update({ConversionSyntax : 1}) # Pre-made alternate contexts offered by the specification # Don't change these; the user should be able to select these # contexts and be able to reproduce results from other implementations # of the spec. +_basic_traps = dict.fromkeys(Signals, 1) +_basic_traps.update({Inexact:0, Rounded:0, Subnormal:0}) + BasicContext = Context( prec=9, rounding=ROUND_HALF_UP, trap_enablers=_basic_traps,