[Ipopt] ipopt with python

[Jason Moore]

Here are a few notes on installing cyipopt on Ubuntu:

http://www.moorepants.info/notebook/notebook-2014-07-01.html

I modified the cyipopt setup.py a bit for linux. My branch is here:
https://bitbucket.org/moorepants/cyipopt


Jason
moorepants.info
+01 530-601-9791

On Fri, Nov 21, 2014 at 10:52 AM, Vyacheslav Kungurtsev <
vyacheslav.kungurtsev at esat.kuleuven.be> wrote:

> OK. I tried this, but the error from pyipopt remains.
>
> Thanks
> ~Vyacheslav
>
> On Fri, Nov 21, 2014 at 4:44 PM, Tony Kelman <kelman at berkeley.edu> wrote:
>
>>   I don’t know the Python interfaces to Ipopt very well. One thing you
>> might try is configuring Ipopt with --enable-dependency-linking, I think
>> that can be necessary to dlopen Ipopt shared libraries including their
>> dependencies from Python or Julia or other languages. You won’t have dll’s
>> on Ubuntu, you’ll have .so shared libraries.
>>
>> -Tony
>>
>>
>>  *From:* Vyacheslav Kungurtsev <vyacheslav.kungurtsev at esat.kuleuven.be>
>> *Sent:* Friday, November 21, 2014 7:32 AM
>> *To:* Tony Kelman <kelman at berkeley.edu>
>> *Cc:* ipopt at list.coin-or.org
>> *Subject:* ipopt with python
>>
>>   Hello,
>>
>> Somehow after the weekend I tried again and ipopt installed just fine and
>> the examples ran OK. I have no idea what happened.
>>
>>
>>
>> Now I am trying to run ipopt with python, and having trouble with both
>> pyipopt and cyipopt
>>
>> With pyipopt:
>>
>>
>> the error appears as:
>>
>> ~/pyipopt/examples$ python hs071.py
>> Traceback (most recent call last):
>>   File "hs071.py", line 6, in <module>
>>     import pyipopt
>>   File "/usr/local/lib/python2.7/
>> dist-packages/pyipopt/__init__.py", line 16, in <module>
>>     from pyipoptcore import *
>> ImportError:
>> /usr/local/lib/python2.7/dist-packages/pyipopt/pyipoptcore.so: undefined
>> symbol: _ZTVN10__cxxabiv117__class_type_infoE
>>
>>
>> Indeed, it so happens that:
>>
>> $ nm /usr/local/lib/python2.7/dist-
>> packages/pyipopt/pyipoptcore.so | grep
>> _ZTVN10__cxxabiv117__class_type_infoE
>>                  U _ZTVN10__cxxabiv117__class_type_infoE
>>
>>
>> the symbol arises from libstdc++ and I have tried adding it to setup.py
>> as such:
>>         extra_link_args=['-libstdc++']
>> ,
>>
>> or
>>
>>         extra_link_args=['-libstdc++', + IPOPT_LIB],
>>
>> or
>>
>>         libraries=[
>> ...
>>             'coinmetis','libstdc++',
>> ...
>>
>> and in all cases setup.py installs with no error, but the import error
>> remains when I try to run the example.
>>
>> Do you have any suggestions? Am I linking it improperly in the setup file?
>>
>>
>>
>> With cyipopt the setup.py requires:
>> these
>>     IPOPT_ICLUDE_DIRS=['include_mt/coin', np.get_include()]
>>     IPOPT_LIBS=['Ipopt39', 'IpoptFSS']
>>     IPOPT_LIB_DIRS=['lib_mt/x64/release']
>>     IPOPT_DLL=['Ipopt39.dll', 'IpoptFSS39.dll']
>> to be set correctly. I am not quite sure how to find the proper
>> directories. Would I even have dll files given that I am running ubuntu?
>>
>> Sorry if the question is rather basic.
>>
>>
>> some info about my computer, if it helps:
>> Ubuntu 14.04
>> gcc (Ubuntu 4.8.2-19ubuntu1) 4.8.2
>> g++ (Ubuntu 4.8.2-19ubuntu1) 4.8.2
>>
>>
>>
>>
>> Thank you
>>
>>
>>
>
>
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