I’m working on a
Flask project and I want to have my index load more contents when scroll.
I want to set a global variable to save how many times have the page loaded.
My project is structured as :
???run.py ???app ???templates ???_init_.py ???views.py ???models.py
At first, I declare the global variable in
and Pycharm warned
Global variable 'index_add_counter' is undefined at the module level
from app import app,db,index_add_counter
ImportError: cannot import name index_add_counter
I’ve also referenced global-variable-and-python-flask
But I don’t have a main() function.
What is the right way to set global variable in Flask?
You are not defining, just declaring so it’s like saying there is a global
index_add_counter variable elsewhere, and not create a global called
index_add_counter. As you name don’t exists, Python is telling you it can not import that name. So you need to simply remove the
global keyword and initialize your variable:
index_add_counter = 0
Now you can import it with:
from app import index_add_counter
is used inside modules’ definitions to force the interpreter to look for that name in the modules’ scope, not in the definition one:
index_add_counter = 0 def test(): global index_add_counter # means: in this scope, use the global name print(index_add_counter)