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Showing content from https://mail.python.org/pipermail/python-dev/2005-May/053966.html below:

[Python-Dev] Adventures with Decimal

[Python-Dev] Adventures with Decimal [Python-Dev] Adventures with DecimalTim Peters tim.peters at gmail.com
Fri May 20 23:51:47 CEST 2005
[Guido]
> It looks like if you pass in a context, the Decimal constructor
> still ignores that context:
> 
> >>> import decimal as d
> >>> d.getcontext().prec = 4
> >>> d.Decimal("1.2345678901234567890123456789012345678901234567890000",
> d.getcontext())
> Decimal("1.2345678901234567890123456789012345678901234567890000")
> >>>
> 
> I think this is contrary to what some here have claimed (that you
> could pass an explicit context to cause it to round according to the
> context's precision).

I think Michael Chermside said that's how a particular Java
implementation works.

Python's Decimal constructor accepts a context argument, but the only
use made of it is to possibly signal a ConversionSyntax condition.
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