Preserving global state in a flask application [duplicate]

Answer 1

This line

with app.app_context():
    f.g.foo = "bar"

Since you are using the "with" keyword, once this loop is executed, it calls the __exit__ method of the AppContext class. See this. So the 'foo' is popped out once done. Thats why you don't have it available again. You can instead try:

ctx = app.app_context()
f.g.foo = 'bar'
ctx.push()

Until you call the following, g.foo should be available

ctx.pop()

I am howver not sure if you want to use this for the purpose of caching.