Where do I get a SECRET_KEY for Flask?

Question

I am trying to set up Flask-Debugtoolbar, but I get the message "DebugToolBar requires a SECRET_KEY". Where do I get the secret key?

Answer 1

Get the random string for secret key:

Method 1: Use os in Python 2/3:

>>> import os >>> os.urandom(12) '\xf0?a\x9a\\\xff\xd4;\x0c\xcbHi' 

Method 2: Use uuid in Python 2/3:

>>> import uuid >>> uuid.uuid4().hex '3d6f45a5fc12445dbac2f59c3b6c7cb1' 

Method 3: Use secrets in Python >= 3.6:

>>> import secrets >>> secrets.token_urlsafe(16) 'Drmhze6EPcv0fN_81Bj-nA' >>> secrets.token_hex(16) '8f42a73054b1749f8f58848be5e6502c' 

Method 4: Use os in Python 3:

>>> import os >>> os.urandom(12).hex() 'f3cfe9ed8fae309f02079dbf' 

Set secret key in Flask

Method 1: Use app.secret_key:

app.secret_key = 'the random string' 

Method 2: Use app.config:

app.config['SECRET_KEY'] = 'the random string'     

Method 3: Put it in your config file:

SECRET_KEY = 'the random string' 

Then load the config form config file:

app.config.from_pyfile('config.py')  # if your config file's name is config.py