cameraparam xml

#!/usr/bin/env python3
# -*- coding: utf-8 -*-

import glob
import os
import subprocess
import datetime
import shutil

is_backup_required = True

def convert_xml(xml_filename):
    mtime = os.stat(xml_filename).st_mtime
    dt = datetime.datetime.fromtimestamp(mtime)
    if is_backup_required:
        backup_xml_filename = xml_filename + '_' + dt.strftime('%Y%m%d_%H%M%S') + '.bak'
        shutil.copy2(xml_filename, backup_xml_filename)  # preserves the file’s metadata
    cmd = 'gust_enc.exe ' + xml_filename
    print('execute ' + cmd)
    subprocess.call(cmd, shell=True)


def xml_updated_check(xml_filename):
    ''
    if not os.path.isfile(xml_filename):
        return False
    e_filename = xml_filename + '.e'
    if not os.path.isfile(e_filename):
        return False
    a = os.stat(xml_filename).st_mtime
    b = os.stat(e_filename).st_mtime
    if a > b:
        return True
    return False


def main():
    xml_filename_list = glob.glob('*.xml')
    for xml_filename in xml_filename_list:
        if xml_updated_check(xml_filename):
            convert_xml(xml_filename)


if __name__ == "__main__":
    main()