import json
import csv
import sys
input = []
for line in open('test.txt', 'r'):
    input.append(json.loads(line))

with open("data.csv","w") as data_list:
    output = csv.writer(data_list)
    keys = input[1].keys()
    output.writerow(keys)
    for row in input:
        data = [row.get(key, "") for key in keys]
        output.writerow(data)