altconverter.py

#!/usr/bin/env python
import json
import csv
import sys

def main():
    if len(sys.argv) < 3:
        print("Usage: " + sys.argv[0] +"input.json output.csv")
    else:
        with open(sys.argv[1]) as jsonfile:
            with open(sys.argv[2], "w") as csvfile:
                writer = csv.writer(csvfile)
                data = json.load(jsonfile)
                for entry in data:
                    line = [entry["main"]]
                    line.extend(entry["alts"])
                    writer.writerow(line)

if __name__ == "__main__":
    main()