#!/usr/bin/python
# coding: iso-8859-1

Logwerte = [{ "name" : "Name1",
              "GAs"  : [{ "GA" : "GA1",
                         "columnName" : "A"}]},
            { "name" : "Name2",
              "GAs"  : [{ "GA" : "GA2",
                         "columnName" :  "A"},
                        { "GA"   :  "GA3",
                         "columnName" : "B"}]}]

for element in Logwerte:
    for GAelement in element["GAs"]:
        print "subscribe for GA " + GAelement["GA"] + " and columnName " + GAelement["columnName"]