Convert a curse modpack into an ATLauncher XML modpack file

convert.py

import xml.etree.ElementTree as ET
import json
import urllib.request
import shutil
import zipfile
import os.path

#Curse Base URL
baseurl = "https://minecraft.curseforge.com/projects/"
dl_base_url = "http://files.sfxworks.net/lapitos/"
internal_base_url = "/var/www/html/lapitos/"


#<XML> Mod Header -------------------
XMLversion = ET.Element("version")
mods = ET.SubElement(XMLversion, "mods")

#Unzip somwhere...

#Load manifest
with open("manifest.json") as f:
    manifest = json.load(f)

#Retrieve File
for file in manifest['files']:
    #Parse Vars
    invalidJson = False
    projectID = str(file['projectID'])
    fileID = str(file['fileID'])
    curseFile = baseurl + projectID + "/files/" + fileID + '/download'
    file_name = projectID + '-' + fileID

    #Mod defaults
    version = "0"
    name = projectID + "-" + fileID
    website = baseurl + projectID + "/files/" + fileID
    description = "This mod has invalid json in their mcmod.info file. You will have to gather these values manually."

    print("Getting " + file_name)

    if os.path.isfile(internal_base_url + file_name) is not True:
        with urllib.request.urlopen(curseFile) as response, open(internal_base_url + file_name, 'wb') as out_file:
            shutil.copyfileobj(response, out_file)

    archive = zipfile.ZipFile(internal_base_url + file_name)
    print("Extracting mcmod.info")
    for archive_file in archive.namelist():
        if archive_file.startswith('mcmod.info'):
            archive.extract(archive_file, 'tmp')
            break

    with open('tmp/mcmod.info') as f:
        try:
            print("Parsing mcmod.info")
            #Get mcmod.info
            mcmodinfo = json.load(f)
            #Get object position read if modlistversion is 2
            if 'modListVersion' in mcmodinfo:
                if mcmodinfo['modListVersion'] == 2:
                    mcmodinfo = mcmodinfo['modList']

            #Overwrite defaults for values to extract
            version = str(mcmodinfo[0]['version'])
            name = mcmodinfo[0]['name']
            website = baseurl + projectID
            if 'url' in mcmodinfo[0]:
                if mcmodinfo[0]['url'] is not "":
                            website = mcmodinfo[0]['url']
            if 'description' in mcmodinfo[0]:
                description = mcmodinfo[0]['description']
        #Handle bad json
        except (ValueError, KeyError):
            print ("----MOD HAS INVALID JSON----")

    url = dl_base_url + file_name
    print("Writing " + name + " in XML")
    ET.SubElement(mods, "mod", name=name, version=version, file=file_name, url=url, description=description, website=website, download="direct", type="mods")


print ("Writing XML")
tree = ET.ElementTree(XMLversion)
tree.write("test.xml")