#!/usr/bin/env python

import sys

if len(sys.argv) >= 2:
    filename = sys.argv[1]
else:
    filename = "data.txt"

data = {}

try:
    with open(filename, "r") as fileobj:
        for i, line in enumerate(fileobj):
            line = line.strip()  # remove whitespace from start/end of line

            if line.startswith('#'):
                # ignore comment lines
                continue

            name, raw_data = line.split(":", 1)  # split line at first colon
            items = raw_data.split(",")          # split raw data at commas

            data[name.strip()] = items
except OSError as exc:
    print(f"Could not open file {filename}: {exc}")

for key in data:
    print(key, data[key])