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def read_file(filename):
with open(filename) as f:
return f.read().strip()
def callback():
battery = "BAT0"
try:
now = int(read_file(f"/sys/class/power_supply/{battery}/energy_now"))
full = int(read_file(f"/sys/class/power_supply/{battery}/energy_full"))
percent = round(now / full * 100)
return f"BAT: {percent}%"
except FileNotFoundError:
return f"BAT: Disabled"
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