Re: [Quantlib-users] Deprecated functions in Quantlib

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

We're not going to remove 1.17 from pypi, so yes, you can continue using
it, but it's a photograph of when it was released.  It won't be updated
with bug fixes or new features — those are going in new versions.

Luigi


On Wed, Oct 20, 2021 at 8:21 AM Ashish Bansal <ash...@gm...>
wrote:

> My mistake. We are using v1.17 only. We have not upgraded. Till when this
> version will be supported? Is there a date for sunsetting old versions?
> Or, Can we keep using v1.17 indefinitely? FYI, we are using the
> python-based quantlib.
>
> Regards,
> Ashish
>
> On Wed, 20 Oct 2021 at 02:41, Luigi Ballabio <lui...@gm...>
> wrote:
>
>> Hello Ashish,
>>     I'm puzzled.  Here's what happens on my machine when I create a clean
>> environment with QuantLib 1.22 and try to access FDAmericanEngine:
>>
>> [/tmp] $ python -m venv test-venv
>> [/tmp] $ . test-venv/bin/activate
>> (test-venv) [/tmp] $ pip install QuantLib==1.22
>> Collecting QuantLib==1.22
>>   Using cached QuantLib-1.22-cp37-cp37m-macosx_10_9_x86_64.whl (14.5 MB)
>> Installing collected packages: QuantLib
>> Successfully installed QuantLib-1.22
>> WARNING: You are using pip version 20.1.1; however, version 21.3 is
>> available.
>> You should consider upgrading via the '/private/tmp/test-venv/bin/python
>> -m pip install --upgrade pip' command.
>> (test-venv) [/tmp] $ python
>> Python 3.7.9 (v3.7.9:13c94747c7, Aug 15 2020, 01:31:08)
>> [Clang 6.0 (clang-600.0.57)] on darwin
>> Type "help", "copyright", "credits" or "license" for more information.
>> >>> import QuantLib as ql
>> >>> ql.FDAmericanEngine
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>> AttributeError: module 'QuantLib' has no attribute 'FDAmericanEngine'
>> >>>
>>
>> Are you sure you're using version 1.22 and not an older one?  You can
>> check with print(ql.__version__)
>>
>> Luigi
>>
>>
>>
>> On Tue, Oct 19, 2021 at 10:34 PM Ashish Bansal <ash...@gm...>
>> wrote:
>>
>>> Thanks Luigi for the answer.
>>>
>>> If it was removed in 1.22, then how come it still works and provide us
>>> an output? Would the output be wrong?
>>>
>>> If we migrate from FDAm..engine to FDBla..engine, would the output
>>> remain same since both use same inputs? Sorry for my ignorance about it. Am
>>> new to QL.
>>>
>>> Regards
>>> Ashish
>>>
>>>
>>> On Tue, Oct 19, 2021, 4:46 PM Luigi Ballabio <lui...@gm...>
>>> wrote:
>>>
>>>> Hello,
>>>>     deprecated functions stay in the library for four or five more
>>>> releases and then they are removed.  The FDAmericanEngine class was
>>>> deprecated in version 1.17 and finally removed in version 1.22, so yes, if
>>>> you upgrade you'll need to use FdBlackScholesVanillaEngine instead.
>>>>
>>>> Luigi
>>>>
>>>>
>>>> On Tue, Oct 19, 2021 at 12:36 PM Ashish Bansal <ash...@gm...>
>>>> wrote:
>>>>
>>>>> Hi,
>>>>>
>>>>> We are using the quantlib for valuating the european and
>>>>> american options using functions which were deprecated in v1.22 in
>>>>> April-2021 e.g. FDAmericanEngine. We are calling through python code.
>>>>>
>>>>> Want to know if these will keep working as they were or should they be
>>>>> replaced with new function FdBlackScholesVanillaEngine soon? Is there any
>>>>> date till these will work? Does deprecated mean no new development or
>>>>> existing stops working properly too?
>>>>>
>>>>> Thanks
>>>>> Ashish Bansal
>>>>> _______________________________________________
>>>>> QuantLib-users mailing list
>>>>> Qua...@li...
>>>>> https://lists.sourceforge.net/lists/listinfo/quantlib-users
>>>>>
>>>>