Looking for a scriptable tool to send transactions for many altcoins

[UntaggedLady]

I am developing a web app that needs to check balances and send transactions for BTC, LTC, DOGE, XMR, and hopefully others. Is there a good tool (ideally Python) that can be used to check balances and send transactions without sending the keys to an external API, but without running full nodes for each currency? Any suggestions?

I'm looking for something similar to a command-line Electrum program, where a full node isn't required. The kicker is that it should have a unified interface/API for multiple cryptos.