s = [('value0', 'value1', 'value2'), ('value0', 'value1', 'value2'), ('value0', 'value1', 'value2')]
res = dict()
for i, tpl in enumerate(s, 1):
    for ii, value in enumerate(tpl, 1):
        res.setdefault(i, dict()).setdefault("key%s" % ii, value)
print res