Jython get filename

import re as _re
import os as _os

import java.lang.System as System # pyright: ignore[reportMissingImports]

def get_filename():
    command = str(System.getProperties().get("sun.java.command"))
    # current_dir = System.getProperty("user.dir")

    if command.find("com.ibm.ws.admin.services.WsAdmin") != -1:
        filename_regex = r'-f\s+(.*\.py)'               # wsadmin.sh -f 'filename.py'
    elif command.find("com.vtservices.opat.batch.impl.websphere.RunWasBatch") != -1:
        filename_regex = r'-executeScript\s+(.*\.py)'   # myWasBatch.sh -executeScript 'filename.py'
    else:
        raise Exception("Unsupported CLI command: '%s'" % command)

    filename = _re.search(filename_regex, command)
    if filename is None:
        return None

    return _os.path.abspath(filename.group(1))

if __name__ == '__main__':
    print("Current script is '%s'" % str(get_filename()))