# KeyError on starting flask with Tryton **URL:** \ **Category:** Developer\ **Tags:** flask\ **Created:** [September 4, 2020, 6:28pm UTC](https://discuss.tryton.org/t/keyerror-on-starting-flask-with-tryton/3187 "2020-09-04T18:28:55Z")\ **Posts on this page:** 9\ **Page:** 1
**Author:** ![yoeldiomedez](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/yoeldiomedez/32/943_2.png) [@yoeldiomedez](https://discuss.tryton.org/u/yoeldiomedez)\ **Post date:** [September 4, 2020, 6:28pm UTC](https://discuss.tryton.org/t/keyerror-on-starting-flask-with-tryton/3187/1 "2020-09-04T18:28:55Z")
Hello, I’m trying to run the example but I get the following `KeyError`: ``` Traceback (most recent call last): File "/home/yoel/Development/tryton/marketing/app/app.py", line 11, in User = tryton.pool.get('res.user') File "/home/yoel/Development/tryton/marketing/venv/lib/python3.6/site-packages/trytond/pool.py", line 179, in get return self._pool[self.database_name][type][name] KeyError: 'res.user' ``` This is how looks my `app.py` file: ``` from flask import Flask from flask_tryton import Tryton app = Flask( __name__ ) app.config['TRYTON_CONFIG'] = '/home/yoel/Development/tryton/5.0/full/conf/trytond.conf' app.config['TRYTON_DATABASE'] = 'tryton_full_new' app.config['TRYTON_USER'] = 1 tryton = Tryton(app, configure_jinja=True) User = tryton.pool.get('res.user') @tryton.default_context def default_context(): return User.get_preferences(context_only=True) @app.route('/') @tryton.transaction() def hello(): user, = User.search([('login', '=', 'admin')]) return '%s, Hello World!' % user.name @app.route('/user/') @tryton.transaction() def user(user): return user.name @app.route('/users/') @tryton.transaction() def users(users): return ', '.join(u.name for u in users) if __name__ == ' __main__': app.run(debug=True, port=5000) ``` Could anyone tell me how can I make it work? Thanks. ---
**Author:** ![German](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/german/32/143_2.png) [@German](https://discuss.tryton.org/u/German)\ **Post date:** [September 4, 2020, 6:39pm UTC](https://discuss.tryton.org/t/keyerror-on-starting-flask-with-tryton/3187/2 "2020-09-04T18:39:00Z")
You need a working trytond server first. Flask\_tryton it’s another interface for your existing trytond server (Like tryton client ). Did you check trytond.conf? Are you able to connect using tryton client on same server ? ---
**Author:** ![iehoshia](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/iehoshia/32/243_2.png) [@iehoshia](https://discuss.tryton.org/u/iehoshia)\ **Post date:** [September 4, 2020, 6:43pm UTC](https://discuss.tryton.org/t/keyerror-on-starting-flask-with-tryton/3187/3 "2020-09-04T18:43:51Z")
Hi, Make sure your TRYTON\_CONFIG and TRYTON\_DATABASE variables are well configured. AFAIK you don’t need to setup TRYTON\_USER (default is used, 0): I’m sure you will find more information here > **[Client Challenge](https://pypi.org/project/flask-tryton/)** ---
**Author:** ![yoeldiomedez](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/yoeldiomedez/32/943_2.png) [@yoeldiomedez](https://discuss.tryton.org/u/yoeldiomedez)\ **Post date:** [September 4, 2020, 7:57pm UTC](https://discuss.tryton.org/t/keyerror-on-starting-flask-with-tryton/3187/4 "2020-09-04T19:57:20Z")
My trytond.conf it’s fine and working, I’m able to connect by web and desktop client `trytond.conf`: ``` [database] uri = postgresql://tryton_full_new:tryton_full_new@127.0.0.1:5432 path = /home/yoel/Development/tryton/5.0/full/attach list = True retry = 5 language = es_419 [session] timeout = 7200 [web] listen = 127.0.0.1:8005 root = /home/yoel/Development/tryton/5.0/full/sao [email] uri = smtp://localhost:25 from = Tryton ERP Perú [account_invoice] sunat_invoicing = /home/yoel/Development/tryton/5.0/full/sunat/invoices debug = development ``` Web: ![image](https://discuss-cdn.tryton.org/uploads/default/original/2X/d/ddd75936cb22f1d20b5c75803066c17d65204610.png) Desktop: ![image](https://discuss-cdn.tryton.org/uploads/default/original/2X/4/4aa9aaf84a1be89f6ea0902bc39d8203f6ebc85c.png) ---
**Author:** ![yoeldiomedez](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/yoeldiomedez/32/943_2.png) [@yoeldiomedez](https://discuss.tryton.org/u/yoeldiomedez)\ **Post date:** [September 4, 2020, 8:08pm UTC](https://discuss.tryton.org/t/keyerror-on-starting-flask-with-tryton/3187/5 "2020-09-04T20:08:55Z")
I come from there, looking for some help here. About the variables I edited my post and I replied to @German ---
**Author:** ![iehoshia](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/iehoshia/32/243_2.png) [@iehoshia](https://discuss.tryton.org/u/iehoshia)\ **Post date:** [September 4, 2020, 8:16pm UTC](https://discuss.tryton.org/t/keyerror-on-starting-flask-with-tryton/3187/6 "2020-09-04T20:16:58Z")
Are you using a virtualenv? If yes, You need to active tryton\_flask inside the same virtualenv that trytond is running. ---
**Author:** ![yoeldiomedez](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/yoeldiomedez/32/943_2.png) [@yoeldiomedez](https://discuss.tryton.org/u/yoeldiomedez)\ **Post date:** [September 15, 2020, 4:13pm UTC](https://discuss.tryton.org/t/keyerror-on-starting-flask-with-tryton/3187/7 "2020-09-15T16:13:52Z")
Yes, I’m using virtualenv, I’ve moved the Flask script to the same virtualenv that uses Tryton, but I’m still getting the same KeyError that I posted at the beginning of this topic. Is it imperative use the same virtualenv for Tryton and Flask? ---
**Author:** ![yoeldiomedez](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/yoeldiomedez/32/943_2.png) [@yoeldiomedez](https://discuss.tryton.org/u/yoeldiomedez)\ **Post date:** [September 15, 2020, 4:30pm UTC](https://discuss.tryton.org/t/keyerror-on-starting-flask-with-tryton/3187/8 "2020-09-15T16:30:51Z")
“There are three configuration options available” says the package: ``` >>> from flask import Flask >>> from flask_tryton import Tryton >>> app = Flask( __name__ ) >>> app.config['TRYTON_DATABASE'] = 'tryton_full_new' >>> tryton = Tryton(app, configure_jinja=True) Traceback (most recent call last): File "", line 1, in File "/home/yoel/Development/tryton/new/full/env/lib/python3.6/site-packages/flask_tryton.py", line 52, in __init__ self.init_app(app) File "/home/yoel/Development/tryton/new/full/env/lib/python3.6/site-packages/flask_tryton.py", line 67, in init_app with Transaction().start(database, user, readonly=True): File "/home/yoel/Development/tryton/new/full/env/lib/python3.6/site-packages/trytond/transaction.py", line 107, in start database = backend.Database(database_name).connect() File "/home/yoel/Development/tryton/new/full/env/lib/python3.6/site-packages/trytond/backend/sqlite/database.py", line 344, in connect raise IOError('Database "%s" doesn\'t exist!' % path) OSError: Database "/home/yoel/db/tryton_full_new.sqlite" doesn't exist! ``` Why is looking for a .sqlite database? I mean, it’s not clear if the TRYTON\_DATABASE is just a string or an URI ---
**Author:** ![pokoli](https://discuss-cdn.tryton.org/user_avatar/discuss.tryton.org/pokoli/32/22_2.png) [@pokoli](https://discuss.tryton.org/u/pokoli)\ **Post date:** [September 15, 2020, 4:44pm UTC](https://discuss.tryton.org/t/keyerror-on-starting-flask-with-tryton/3187/9 "2020-09-15T16:44:27Z")
> [@yoeldiomedez](#): > > Is it imperative use the same virtualenv for Tryton and Flask? Yes, you should run the same code so flask is able to load the Tryton modules. > [@yoeldiomedez](#): > > Why is looking for a .sqlite database? Because you did not set up any trytond.conf file, so it’s using the default one which uses sqlite. You should set the TRYTOND\_CONFIG environment variable pointing to the route of your configuration file to use a diferent backend. > [@yoeldiomedez](#): > > I mean, it’s not clear if the TRYTON\_DATABASE is just a string or an URI A string indicating the name of the database.