Re: [Quantlib-users] Failed to import QuantLib library in python

[Christofer B. <bog...@gm...>]

It would be better if I can load QuantLin with Python3.

I failed to use some of the packages with Python2 (2.7.16) like matplotlib.
Thanks,

On Thu, Aug 13, 2020 at 8:09 PM Javid Ashraff <jav...@ya...>
wrote:

> I recall having the same problem in the past.  Try using pip install
> rather than pip3 install.
>
> Regards,
>
> Javid
>
> On Thursday, 13 August 2020, 19:15:32 GMT+8, Christofer Bogaso <
> bog...@gm...> wrote:
>
>
> Thanks.
>
> I have reinstalled Python3 using brew. And then installed again the
> QuantLib as below -
>
> pip3 install QuantLib-Python
>
> Requirement already satisfied: QuantLib-Python in
> /usr/local/lib/python3.8/site-packages (1.18)
>
> Requirement already satisfied: QuantLib in
> /usr/local/lib/python3.8/site-packages (from QuantLib-Python) (1.19)
>
> After that I tried to import the library within Python3, but failed.
>
> >>> import QuantLib as ql
>
> Traceback (most recent call last):
>
>   File "<stdin>", line 1, in <module>
>
> ModuleNotFoundError: No module named 'QuantLib'
>
> Any idea why is it failing?
>
> On Thu, Aug 13, 2020 at 4:36 PM Luigi Ballabio <lui...@gm...>
> wrote:
>
> I don't think there is.  You'll probably have to remove the *build/bdist.macosx-10.15-x86_64/egg/
> *directory.  To be sure you're not missing anything, you might also run
> "pip uninstall QuantLib-Python" first, then look for anything related to
> QuantLib in /usr/local/lib and its Python subdirectories.  Once you clean
> them (but be careful to only clean stuff with "quantlib" in its name), you
> can run "pip install" again.
>
> Luigi
>
>
> On Thu, Aug 13, 2020 at 12:00 PM Christofer Bogaso <
> bog...@gm...> wrote:
>
> Thanks Luigi. But, how can I clean that? Is there any specific syntax?
>
> On Thu, Aug 13, 2020 at 3:19 PM Luigi Ballabio <lui...@gm...>
> wrote:
>
> Hello,
>     from the fact the traceback starts from "
> *build/bdist.macosx-10.15-x86_64/egg/"* and the fact it refers to
> */usr/local/lib/libQuantLib.0.dylib,* it looks to me like it's importing
> a version you tried to compile rather than the one you installed with pip.
> If that's the case, I'd try cleaning that one up.
>
> Hope this helps,
>     Luigi
>
>
> On Thu, Aug 13, 2020 at 11:35 AM Christofer Bogaso <
> bog...@gm...> wrote:
>
> Hi,
>
> I wanted to run QuantLib from my Python workplace, however failed to
> import the library with below error -
>
>
>
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> *>>> import QuantLibTraceback (most recent call last):  File "<stdin>",
> line 1, in <module>  File
> "build/bdist.macosx-10.15-x86_64/egg/QuantLib/__init__.py", line 24, in
> <module>  File "build/bdist.macosx-10.15-x86_64/egg/QuantLib/QuantLib.py",
> line 13, in <module>  File
> "build/bdist.macosx-10.15-x86_64/egg/QuantLib/_QuantLib.py", line 7, in
> <module>  File "build/bdist.macosx-10.15-x86_64/egg/QuantLib/_QuantLib.py",
> line 6, in __bootstrap__ImportError:
> dlopen(/Users/aa/Library/Caches/Python-Eggs/QuantLib_Python-1.16.1-py2.7-macosx-10.15-x86_64.egg-tmp/QuantLib/_QuantLib.so,
> 2): Symbol not found:
> __ZN8QuantLib10IborCouponC1ERKNS_4DateEdS3_S3_jRKN5boost10shared_ptrINS_9IborIndexEEEddS3_S3_RKNS_10DayCounterEb
> Referenced from:
> /Users/aa/Library/Caches/Python-Eggs/QuantLib_Python-1.16.1-py2.7-macosx-10.15-x86_64.egg-tmp/QuantLib/_QuantLib.so
> Expected in: /usr/local/lib/libQuantLib.0.dylib in
> /Users/aa/Library/Caches/Python-Eggs/QuantLib_Python-1.16.1-py2.7-macosx-10.15-x86_64.egg-tmp/QuantLib/_QuantLib.so*
>
> I used the syntax *pip install QuantLib-Python* when I installed
> QuantLib, the installation appears to be successful.
>
> Any help will be highly appreciated.
>
> Thanks,
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