'Babel' object has no attribute 'translation_directories'

[BGraco]

I am getting a:

'Babel' object has no attribute 'translation_directories'

error after updating Flask-Babel from 0.9 to 0.11.1.

I found a similar reference at https://github.com/airbnb/superset/issues/847 which claims the issue was flask extension compatibility related.

I have been looking for any sort of documentation that indicates what flask extensions have compatibility with one another, is it just assumed that the minor version (major.minor.build) must match to be compatible?

Here are my current application versions that are having the issue:

Babel (2.3.4)
Flask (0.11.1)
Flask-Babel (0.11.1)
Flask-BabelEx (0.9.3)
Flask-Compress (1.3.2)
Flask-Login (0.4.0)
itsdangerous (0.24)
Jinja2 (2.8)
MarkupSafe (0.23)
pytz (2016.7)
setuptools (28.8.0)
speaklater (1.3)
Werkzeug (0.11.11)

Again, all works with version 0.9 of flask-babel, just trying to understand if compatibility is the root cause or is there a real issue lurking.

[jb-l]

Just in case someone find this useful: I had the same problem, but i tracked it down to an incorrect import of gettext (between flask-babel and flask-babelex).
I cannot be sure for @BGraco case but this error might not be linked to Flask-Babel.

To reproduce the error :

from flask import Flask
from flask_babelex import Babel
from flask_babel import gettext# <- This is incorrect, it should be imported from flask_babelex

app = Flask(__name__)
babel = Babel(app)

@app.route('/')
def hello_world():
    return gettext("Hello World")

app.run()

[BGraco]

@jb-l Thank you so much for taking the time to post!
Just tried your fix, and it worked.

[Chamaeleon-]

I had just a similar problem but with babel.load_locale:
AttributeError: 'Babel' object has no attribute 'load_locale'
Your fix worked for me too, maybe the Flask-Babel Documentation should be updated?

[jb-l]

My comment is a bit misleading : I don't think it is a Flask-Babel problem but it is more a problem for Flask-Babelex or on documentation of packages using Flask-Babelex.

These problems appear when you start mixing Flask-Babel and Flask-Babelex (it seems that today Flask-Babelex is not API compatible with Flask-Babel) . Actually I started with your problem @Chamaeleon- (it took me some time to notice that Flask-Security relies on Flask-Babelex).

[Chamaeleon-]

@jb-l uh, Flask-Security uses Babelex? I wonderd why i got problems with mixing up Babelex and Babel, because i only use Babel in my code.
But indeed, I use also Flask-Security, but doesn't expect it to be the reason of my Flask-Babel problems...

[tobias533]

Using Flask-Security, I had the same error:

"AttributeError: 'Babel' object has no attribute 'load_locale'"

I found out that I still used in one handwritten library

from flask_babel import gettext

instead of

from flask_babelex import gettext

Now, I corrected this issue and it works fine.

[LaundroMat]

I have the exact same problem, but importing from flask_babelex didn't solve it. Does anyone have other suggestions?

Update: scratch that. I forgot about Babel itself. This solves it for me

from flask_babelex import Babel, gettext, lazy_gettext

[masete]

did you first uninstall babel or do you have babel and babelex installed. This could still cause issues just use bablex as recommended in the docks