Re: [Quantlib-users] ZeroInflationIndex cannot be constructed from Python

[Luigi B. <lui...@gm...>]

Hi,
    ql.Japan() is a calendar, not an instance of Region.  You can create a
region for Japan using the ql.CustomRegion class.  Once you pass that to
the ZeroInflationIndex constructor, it should work.

Hope this helps,
    Luigi


On Sun, Jan 4, 2026 at 1:33 AM Kenji Ogawa <for...@gm...> wrote:

> Hi there,
>
> I am unable to construct a ZeroInflationIndex from Python using QuantLib
> version 1.40 and the current constructor.
>
> The following Python code fails on my side:
>
> import QuantLib as ql
> jpCPI = ql.ZeroInflationIndex(
>     "Japan CPI",
>     ql.Japan(),
>     False,
>     ql.Monthly,
>     ql.Period(3, ql.Months),
>     ql.JPYCurrency()
> )
>
> Could you please point me to the specific place where this should be fixed?
>
> Regards, Kenji
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