maketuple.py

#!/usr/bin/env python3

from collections import namedtuple

def maketuple(name, params, data):
	tclass=namedtuple(name, params)
	d = tclass._make(data[i] for i in params.split(' '))
	return d

data = {
	"a2":2, "a1":1, "a3":3
}
print (maketuple("test", "a1 a2 a3", data))