> On 7 Feb 2019, at 10:59 pm, oskar hertwig <[email protected]> wrote: > > Hi Graham > > Thanks a lot for your response and you times > > I added the directive WSGIApplicationGroup %{GLOBAL} and the problem was > solved > > Please let me add complementary information that I got during this 2 days > > The problem was not only on windows but also on linux > > About your question, i have checked and it's possible to import numpy twice > in the main interpreter without error
Okay, so the error is misleading and comes back again to the fact that they don't design their C extensions to work properly in sub interpreters. Just be aware that not all WSGI frameworks will allow you to run multiple WSGI applications based on them in the same interpreter context. You can't run two Django application instances in the same interpreter context for example. For Flask I am not sure if you will hit problems or not. As long as you create separate Flask app objects for each and always access things for configuration through that you are probably fine. > During this time i also posted the question on stack overflow > (https://stackoverflow.com/questions/54537814/import-conflict-when-running-flask-app-with-apache-mod-wsgi-on-windows > > <https://stackoverflow.com/questions/54537814/import-conflict-when-running-flask-app-with-apache-mod-wsgi-on-windows>) > > And with you permission i would like to post your response as a solution of > this topic Well, my response was a big confusing in hindsight. Enough to simplify it and say "numpy doesn't work in Python sub interpreters as the C extension modules are not implement properly to allow that, thus for mod_wsgi you can only use numpy in the main interpreter context, forced by the 'WSGIApplicationGroup %{GLOBAL}' directive". > > Kinds regards and thanks again > > Alx > > > > Le mar. 5 févr. 2019 à 22:28, Graham Dumpleton <[email protected] > <mailto:[email protected]>> a écrit : > When using multiple WSGIScriptAlias directives, the applications should > already be running in different sub interpreter contexts. > > If you are getting an error like you see, you might also be setting: > > WSGIApplicationGroup %{GLOBAL} > > to override that behaviour, or you are just hitting one of the various ways > that numpy is broken when used in sub interpreters. > > Unfortunately, removing that isn't really a solution if set, because numpy > usually will not work in sub interpreters, and needs to be used in the main > interpreter context, which is what that WSGIApplicationGroup directive forces. > > In short, if you want to run two isolated WSGI applications which both use > numpy, on Windows you can't do it because of the problems with running numpy > in sub interpreters. > > FWIW, if numpy is giving such an error when imported more than once in the > main interpreter, there is something wrong with numpy. There is no good > reason for that error. > > Graham > >> On 6 Feb 2019, at 2:36 am, [email protected] >> <mailto:[email protected]> wrote: >> >> Hi >> >> I am permit you to ask you about a problem that I have with hosting flask >> application with the portage of mod_wsgi on windows >> >> I have two flask application and only one can be alive a the same times due >> to conflict in import >> >> ie : >> If a request application 1 I have a response >> Then if I request application 2 I have internal server error with error in >> log ... >> Then if I restart apache and I request application 2 I have a response but >> if I request application 1 I have the same internal server error >> If I comments some import like numpy both application can be alive at the >> same time >> >> Any help would be appreciated if you have any idea or link or answer to >> about this problem? >> >> My installation is describe below >> >> Thanks by advance for tour times and your works >> >> Alexandre >> >> >> LOG of the error >> mod_wsgi (pid=4936): Failed to exec Python script file >> 'D:/exec/Apache24/htdocs/wsgi/api_test_2.wsgi'. >> mod_wsgi (pid=4936): Exception occurred processing WSGI script >> 'D:/exec/Apache24/htdocs/wsgi/api_test_2.wsgi'. >> Traceback (most recent call last):\r >> File "D:/exec/Apache24/htdocs/wsgi/api_test_2.wsgi", line 3, in >> <module>\r >> from api_test_2 import app as application\r >> File "D:/exec/wsgi_api/api_test_2\\api_test_2.py", line 2, in >> <module>\r >> import numpy\r >> File "c:\\python\\python36\\lib\\site-packages\\numpy\\__init__.py", >> line 142, in <module>\r >> from . import core\r >> File >> "c:\\python\\python36\\lib\\site-packages\\numpy\\core\\__init__.py", line >> 16, in <module>\r >> from . import multiarray\r >> File >> "c:\\python\\python36\\lib\\site-packages\\numpy\\core\\multiarray.py", line >> 12, in <module>\r >> from . import overrides\r >> File >> "c:\\python\\python36\\lib\\site-packages\\numpy\\core\\overrides.py", line >> 46, in <module>\r >> """)\r >> RuntimeError: implement_array_function method already has a docstring\r >> >> >> #--------------------------------- >> # file : D:/exec/wsgi_api/api_test_1/api_test_1.py >> #--------------------------------- >> from flask import Flask, jsonify,render_template, request, make_response >> import numpy >> app = Flask(__name__) >> @app.route('/') >> def home(): >> resp = make_response("hello from 1", 200) >> resp.headers['Content-Type'] = 'charset=utf-8' >> return resp >> #--------------------------------- >> >> #--------------------------------- >> # file : D:/exec/wsgi_api/api_test_2/api_test_2.py >> #--------------------------------- >> from flask import Flask, jsonify,render_template, request, make_response >> import numpy >> app = Flask(__name__) >> @app.route('/') >> def home(): >> resp = make_response("hello from 2", 200) >> resp.headers['Content-Type'] = 'charset=utf-8' >> return resp >> if __name__ == '__main__': >> app.run(host='127.0.0.1', port=36000) >> #--------------------------------- >> >> >> I have this two wsgi file in appache httpdocs >> >> >> #--------------------------------- >> # file : D:/exec/Apache24/htdocs/wsgi/api_test_1.wsgi >> #--------------------------------- >> import sys >> sys.path.append('D:/exec/wsgi_api/api_test_1/') >> from api_test_1 import app as application >> #--------------------------------- >> >> >> #--------------------------------- >> # file : D:/exec/Apache24/htdocs/wsgi/api_test_2.wsgi >> #--------------------------------- >> import sys >> sys.path.append('D:/exec/wsgi_api/api_test_1/') >> from api_test_1 import app as application >> #--------------------------------- >> >> >> #--------------------------------- >> In D:/exec/Apache24/conf/httpd.conf i add the line >> #--------------------------------- >> WSGIScriptAlias /api_test_1 >> "D:/exec/Apache24/htdocs/wsgi/api_test_1.wsgi" >> WSGIScriptAlias /api_test_2 >> "D:/exec/Apache24/htdocs/wsgi/api_test_2.wsgi" >> #--------------------------------- >> >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "modwsgi" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] >> <mailto:[email protected]>. >> To post to this group, send email to [email protected] >> <mailto:[email protected]>. >> Visit this group at https://groups.google.com/group/modwsgi >> <https://groups.google.com/group/modwsgi>. >> For more options, visit https://groups.google.com/d/optout >> <https://groups.google.com/d/optout>. > > > -- > You received this message because you are subscribed to the Google Groups > "modwsgi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To post to this group, send email to [email protected] > <mailto:[email protected]>. > Visit this group at https://groups.google.com/group/modwsgi > <https://groups.google.com/group/modwsgi>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. > > -- > You received this message because you are subscribed to the Google Groups > "modwsgi" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected] > <mailto:[email protected]>. > To post to this group, send email to [email protected] > <mailto:[email protected]>. > Visit this group at https://groups.google.com/group/modwsgi > <https://groups.google.com/group/modwsgi>. > For more options, visit https://groups.google.com/d/optout > <https://groups.google.com/d/optout>. -- You received this message because you are subscribed to the Google Groups "modwsgi" group. 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