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

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

>From inside Python, try

import sys
print(sys.path)

The list you get should include /usr/local/lib/python3.8/site-packages,
where pip3 installed QuantLib.  If not, you might have some configuration
to do.

On Thu, Aug 13, 2020 at 7:09 PM Christofer Bogaso <
bog...@gm...> wrote:

> 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 -
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> *>>> 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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