'Return all arguments with openid. in front of namespaced arguments.'

def toPostArgs(self):

    args = {}
    for (ns_uri, alias) in self.namespaces.iteritems():
        if self.namespaces.isImplicit(ns_uri):
            continue
        if (alias == NULL_NAMESPACE):
            ns_key = 'openid.ns'
        else:
            ns_key = ('openid.ns.' + alias)
        args[ns_key] = ns_uri
    for ((ns_uri, ns_key), value) in self.args.iteritems():
        key = self.getKey(ns_uri, ns_key)
        args[key] = value.encode('UTF-8')
    return args
