CSV from Textfile

import csv
import re

fieldnames = ['NAME', 'DESCR', 'PID', 'VID', 'SN']
with open('test.csv', 'w') as output:
    writer = csv.DictWriter(output, fieldnames=fieldnames)
    writer.writeheader()

    with open('input.txt', 'r') as input:
        lines = input.readlines()

    for i in range(1, len(lines), 3):
        line = lines[i].strip() + "," + lines[i + 1].strip()
        sections = re.split("([A-Z])\w+:", line)

        curCol = {}
        for j in range(1, len(sections), 2):
            key = fieldnames[j / 2]
            value = sections[j + 1].strip().strip(",").strip("\"")
            curCol[key] = value
        writer.writerow(curCol)