trigger_expression1 = "{"+ZEN_HOST + ":" + ZEN_KEY + ".regexp(\[S1\])}>0 & {"+ZEN_HOST + ":" + ZEN_KEY + ".regexp(\[CLEARED\])}=0"

try:
    create_trigger1 = zapi.trigger.create(
        {
                "description": "{ITEM.VALUE}",
                "type": 1,
                "value_flags": 1,
                "priority": 5,
                "flags" : 0,
                "expression": (trigger_expression1),
                "url" : "tr_comments.php?triggerid={TRIGGER.ID}"
        }
    )
except Exception as e:
        print e