how to simply iterate column values?

Hi Ilya,

I wonder if there is a simple way to iterate specific columns of a table as an alternative to the following implementation (based on pysnmp v4.4.4)?

    @property
    def _notification_targets(self):
        snmpNotifyEntry, = self.instrum.getMibBuilder().importSymbols('SNMP-NOTIFICATION-MIB', 'snmpNotifyEntry')

        varBinds = initialVarBinds = (
            (snmpNotifyEntry.name + (1,), None),
        )

        while varBinds:
            varBinds = self.instrum.readNextVars(varBinds)
            name, val = varBinds[0]
            if exval.endOfMibView.isSameTypeWith(val):
                break
            if name[:len(initialVarBinds[0][0])] != initialVarBinds[0][0]:
                break

            yield str(val)

A simpler and faster method would be the following:

    @property
    def _notification_targets_not_public(self):
        snmpNotifyName, = self.instrum.getMibBuilder().importSymbols('SNMP-NOTIFICATION-MIB', 'snmpNotifyName')
        for oid, val in snmpNotifyName._vars.items():
            yield str(val.syntax)

However, a protected class member is accessed here.

I would appreciate comments or alternative recommendations.

Best regards, Andreas

[etingof]

Sounds like if there was a getSubtrees() method/property alongside registerSubtrees(), that would solve this…

Meanwhile, could you walk snmpNotifyEntry subtree by calling snmpNotifyEntry.getNextNode(name) starting with name=snmpNotifyEntry.name?

[optimosfet]

Meanwhile…

Unfortunately, the use of the .syntax object/property is not appropriate because of the multi-phase procedure for creating/writing. For now, I will continue with the usual suspects .readGet()/.writeCommit().