lists all mentions in a toot thread

tootMentions.py

#! /bin/env python
import argparse, multiprocessing, urllib.request,validators
import json
import sys
from urllib.parse import urlparse
import os.path

if __name__ == '__main__':
    usernames =[]
    multiprocessing.freeze_support()
    argsParser = argparse.ArgumentParser()

    argsParser.add_argument("-u","--url",help="the url of the toot",default="https://social.tchncs.de/@lauteshirn/106221169014088972",type=str)
    args = argsParser.parse_args()
    
    if validators.url(args.url):

        tootUrl = urlparse(args.url)
        if tootUrl.port:
            port = tootUrl.port
        else:
            if tootUrl.scheme == "https":
                port = "443"
            elif tootUrl.scheme == "http":
                port = "80"
            else:
                sys.exit(1)
        APIUrlString = tootUrl.scheme + "://" + tootUrl.hostname + ":" + port + "/api/v1/statuses/" + os.path.split(tootUrl.path)[-1] + "/context"

        response = urllib.request.urlopen(urllib.request.Request(APIUrlString))
        data = json.load(response)
        if not data["ancestors"]:
            pass
        else:
            APIUrlString = tootUrl.scheme + "://" + tootUrl.hostname + ":" + port + "/api/v1/statuses/" + data["ancestors"][0]["id"] + "/context"

            response = urllib.request.urlopen(urllib.request.Request(APIUrlString))
            data = json.load(response)
        for toot in data["descendants"]:
            if toot["mentions"]:
                for mention in toot["mentions"]:
                    menData = urlparse(mention["url"])
                    username = menData.path.replace("/@", "@") + "@" + menData.hostname
                    usernames.append(username)
        usernamesSorted = sorted(set(usernames))
        print(" ".join(usernamesSorted))
    else:
        print("not an URL")