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

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

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 -
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> *>>> 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,
>>>> _______________________________________________
>>>> QuantLib-users mailing list
>>>> Qua...@li...
>>>> https://lists.sourceforge.net/lists/listinfo/quantlib-users
>>>>
>>>