Odoo 8 - get products many2many attribute id (taxes_id) in python

I am trying to get the taxes_id from product template which is a many2many attribute field. I think I somehow need to read an array?

Can anyone point me in the right direction how to read the id?

My tests where: bla = self.pool.get('product.template').browse(cr, uid, id, context) bla.taxes_id

But not working...