UnboundError: local variable 'item_url' referenced before assignment

In another function where URL is a separate variable everything works fine

def afd(url):
    url = '...'
...
links = [...]
async def ...(...):
    items = [...]
    result_id = ...
    for i in range(5):
        if result_id = items[i].id:
            item_url = links[i]
            break
    afd(item_url)
    

I tried nothing because I don't see any problems here and have no idea how to fix it. Some solutions from the internet didn't work

As the error says, you are referencing a variable that is not assigned.
In this case item_url only get assigned if the condition result_id = items[id].id is met, which it's impossible as you are just evaluating an assignment (e.g x = 10) and not a statement (eg x == 10).

And even after fixing the statement, the variable item_url only is assigned for cases in which the item.id is valid, you should define a default value (e.g item_url = [] assuming there is a different url for each item) in case the item.id is invalid or use the variable inside your if body.

Option 1

def afd(url):
    url = '...'
...
links = [...]
async def ...(...):
    items = [...]
    result_id = ...
    items_url = [] // default value
    for i in range(5):
        if result_id == items[i].id: // Correct comparison statement 
            items_url[i] = links[i] // Add valid item_url
            break
    for item_url in items_url:
        afd(item_url) // Invoke afd over every valid item_url

This is by no means the best implementation but more an educational attempt based on your snippet of code.