NPO-Accounting/oxrlib Changeset - 3b732505fa62

Changeset - 3b732505fa62

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Brett Smith - 6 years ago 2017-12-31 14:03:05
brettcsmith@brettcsmith.org

main: Decimal context sets the state of all traps.

This commit started because I noticed in the decimal documentation that
BasicContext doesn't trap decimal.Subnormal, while oxrlib probably should.
The point of this function is to set all the parts of a context that oxrlib
should have to handle currency correctly and safely. With that motivation,
it makes more sense to set all the traps exactly as we want them, rather
than selectively setting "important" ones: they're all important.

1 file changed with 11 insertions and 2 deletions:

oxrlib/__main__.py

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oxrlib/__main__.py

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@@ ... / @@ -7,8 +7,17 @@ import oxrlib.config @@
 def decimal_context(base=decimal.BasicContext):
     context = base.copy()
     context.rounding = decimal.ROUND_HALF_EVEN
     context.traps[decimal.Inexact] = False
     context.traps[decimal.Rounded] = False
     context.traps = {
         decimal.Clamped: True,
         decimal.DivisionByZero: True,
         decimal.FloatOperation: True,
         decimal.Inexact: False,
         decimal.InvalidOperation: True,
         decimal.Overflow: True,
         decimal.Rounded: False,
         decimal.Subnormal: True,
         decimal.Underflow: True,
+    }
     return context
 def main(arglist=None, stdout=sys.stdout, stderr=sys.stderr):

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