Question

I need to add more values to a list of WSHandler connections (Tornado, Python). I’m adding the connection to a list like so self.connections.append(self), but I need to add more information, like self.connections.append({'id': self, 'keyword' : ''}) (and later find the current self id and replace the keyword.)

When I try to add to the list based on self object (like self.connections[self].filter = 'keyword'), I get TypeError: list indices must be integers, not WSHandler.

So how can I do this?

Edit: Managed to find the right object like so:

def on_message(self, message):
    print message
    for x in self.connections:
        if x['id'] == self:
            print 'found something'
            x['keyword'] = message
            print x['keyword']
            print x

Now, how do I remove the whole dict from connections ? self.connections.remove(self) no longer works, of course.

Answer 1

For this use case, you do not need a list of connections. It may be easier to store this in the object itself. Simply use self.filter = 'keyword'.

Otherwise:

for dict in self.connections:
    if dict['id'] == self:
        dict['keyword'] = 'updated'

Or, if you favour brevity over clarity:

for dict in [dict for dict in self.connections if dict['id'] == self]:
    dict['keyword'] == 'updated'

To remove, use:

for dict in self.connections:
    if dict['id'] == self:
        self.connections.remove(dict)