question: bpython in flask application context

[item4]

I want to use bpython in flask application context.

I wrote this code.

config = read_config() # just gen config
app = create_app(config) # just return Flask(__name__).config.update(config)
with app.app_context():
    import bpython
    bpython.embed(locals_=dict(app=app))

But it did not work correctly.

>>> from flask import current_app
>>> current_app.config
Traceback (most recent call last):
  File "<input>", line 1, in <module>
    current_app.config
  File "/Users/item4/.virtualenvs/*/lib/python3.5/site-packages/werkzeug/local.py", line 343, in __getattr__
    return getattr(self._get_current_object(), name)
  File "/Users/item4/.virtualenvs/*/lib/python3.5/site-packages/werkzeug/local.py", line 302, in _get_current_object
    return self.__local()
  File "/Users/item4/.virtualenvs/*/lib/python3.5/site-packages/flask/globals.py", line 34, in _find_app
    raise RuntimeError('working outside of application context')
RuntimeError: working outside of application context

How can I embed bpython in flask application context?

[thomasballinger]

Hm, it looks like this has to do with Flask's Context Locals which are carefully not shared between threads or greenlets, which is the relevant bit for bpython.

Unfortunately the curtsies bpython frontend creates a new greenlet every time it runs code, so even if you were to run app.app_context().__enter__() as soon as bpython started, code run on another repl input would occur in a new greenlet, and the app context would have been cleaned up by this point.

I would suggest using the old bpython curses interface like so:

from flask import Flask
from bpython.cli import main as oldbpython

app = Flask('hello')
with app.app_context():
    oldbpython(locals_={'app': app}, args=['-i', '-q'])

This is very disappointing. What I am understanding is that I can no longer use bpython to work with Flask applications.

[thomasballinger]

Or you'll need to use bpython-curses, which is the old frontend - it's "bpython-curses" from the command line, or in Python code as described above.

[thomasballinger]

(these are included in an installation of bpython)