def _pathlist(self, key, arr):
        params = {}
        i = 0
        for value in arr:
            i += 1
            params["%s.%s" % (key, i)] = value
        return params
Converts a key and an array of values into AWS query param format.
dataset/ETHPy150Open secondstory/dewpoint/libcloud/drivers/ec2.py/EC2NodeDriver._pathlist