windows_install_plugins_from_backup.py

import json
import requests
import subprocess

# path to file extracted from backup or exported from plugin manager
plugin_list = "C:/Users/jneil/Downloads/backup_test/plugin_list.json"

# load master plugin list.
master_plugin_list = requests.get("https://plugins.octoprint.org/plugins.json").json()

# load plugins from backup file
with open(plugin_list) as file:
    plugins = json.load(file)

# loop through master plugin list and if it was in the backup file install it
for plugin in master_plugin_list:
    if any(map(lambda r: r["key"] == plugin["id"], plugins)):
        print("Installing {}".format(plugin["title"]))
        subprocess.run(["pip", "install", plugin["archive"]])