Converts JSON files to other formats via templates

convo.py

"""
Converts JSON files to other formats via templates.
"""

import argparse
import json
import os

from jinja2 import Environment, FileSystemLoader


def main():
    """
    Parse command line arguments, read JSON from input file, transform via template and write to output file.
    """
    parser = argparse.ArgumentParser(
        description='Converts JSON files to other formats via templates')
    parser.add_argument('input', type=str, help='input file to convert')
    parser.add_argument('template', type=str, help='template file for conversion')
    parser.add_argument('output', type=str, help='name of the rendered output file')

    args = parser.parse_args()

    file = open(args.input)
    data = json.load(file)

    template_dir = os.path.dirname(os.path.abspath(args.template))
    environment = Environment(loader=FileSystemLoader(template_dir))

    template_file = os.path.basename(args.template)
    template = environment.get_template(template_file)

    content = template.render(data)

    with open(args.output, mode='w', encoding='utf-8') as document:
        document.write(content)


if __name__ == "__main__":
    main()