Deleting a cookie by name

[nortxort]

So i want to delete a cookie by name. I got no problem accessing the cookies, i just can't figure out how to delete by name.
I am trying to use clear(predicate) i just don't understand how this is to be used. So i ask if someone can show me an example of the correct way of doing this.

The documentation mentions:

Removes all cookies from the jar if the predicate is None. Otherwise remove only those Morsel that predicate(morsel) returns True.

What i find a bit confusing is the

Otherwise remove only those..

This to me sounds like it is removing more than one?

Then in the explanation as to what the predicate parameter is, it states

predicate – callable that gets Morsel as a parameter and returns True if this Morsel must be deleted from the jar.

There it sounds like only one Morsel will be removed.
Can someone show me a code example of how this is to be used?

[Dreamsorcerer]

This to me sounds like it is removing more than one?

Well, yes, the predicate is used to filter which ones to delete.

There it sounds like only one Morsel will be removed.

The predicate is going to be called once for each Morsel.

This is a very standard approach seen across Python (e.g. the builtin filter() function).

[Dreamsorcerer]

It appears Morsel.key is the name: https://docs.python.org/3/library/http.cookies.html#http.cookies.Morsel.key

So, .clear(lambda m: m.key == "some_name") is presumably what you want.

[nortxort]

@Dreamsorcerer Thank you, for the quick reply.

After looking at the code some more, i realized that i should not be the one providing the Morsel. But rather a function that had all the logic in it to decide what cookie to delete. It took me to long, and i feel rather ashamed.

Also, thanks for the code example. I don't know much about lambda, so i guess ill have to read up on that.
But would your code not delete all cookies, with the key "some_name" no matter what domain they came from?

[Dreamsorcerer]

Yes, see the other attributes if you want to restrict it to something else.

A lambda is just an anonymous function, i.e. it is the same as:

def foo(m):
    return m.key == "some_name"

except that it is never assigned a name.

[nortxort]

So i ended up making this function I don't know if it is the most pythonic way of doing it, but it works rather good. I also made a small test file showing a few examples.

Maybe someone else looking for a way of doing this, can use this to get on the right track, and not end up spending as long as i did.

[Dreamsorcerer]

Yep, only suggestion is that because the comparison evaluates to True/False, you don't need an if statement (i.e. one liner: return key == x and domain == y).