Print the battery percentage using colors for High, Medium, Low battery levels. Uses acpitool to parse for battery percentage level.

batt.py

#!/usr/bin/env python
# coding=UTF-8

import sys, subprocess

p = subprocess.Popen(["acpitool", "-ab"], stdout=subprocess.PIPE)
output = p.communicate()[0]

# find the line with the battery percentage
o_cur = [l for l in output.splitlines() if '%' in l][0]

# parse the battery percentage from acpitool stdout
b_cur = [perc.strip()[:-1] for perc in o_cur.split(',') if '%' in perc][0]
b_val = float(b_cur)

# Output

out = (b_cur + u'%').encode('utf-8')

color_green = '\033[32m'
color_yellow = '\033[33m'
color_red = '\033[31m'
color_reset = '\033[00m'
color_out = (
    color_green if b_val > 80
    else color_yellow if b_val > 30
    else color_red
)

out = color_out + out + color_reset + '\n'
sys.stdout.write(out)