Ugly script for polybar to get bluetooth battery and display to stdout; requires FA

bt_battery.py

#!/bin/python3

import subprocess
import sys

nicknames = dict(tuple(n.split("=")) for n in sys.argv[1:])

call = subprocess.run(["upower", "-d"], stdout=subprocess.PIPE)
out = call.stdout
devices = [o for o in out.split(b"\n\n")]

devs = []

for device in devices:
    d = dict()
    lines = device.splitlines()
    for line in lines:
        stripped_line = line.strip()
        if stripped_line.startswith(b"model:"):
            d["model"] = stripped_line.split(b":")[1].strip().decode("utf-8")
        elif stripped_line.startswith(b"percentage:"):
            d["percentage"] = stripped_line.split(b":")[1].strip().decode("utf-8").split(" ")[0].strip()

    if "model" in d and "percentage" in d:
        devs.append(d)

s = ""
for d in devs:
    name = nicknames[d["model"]] if d["model"] in nicknames else d["model"]
    if name == "!":
        continue
    s += " "
    s += name
    s += " "
    s += d["percentage"]
    s += "   "

s = s.strip()

print(s)