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jsyeo/power_now.py

Created July 20, 2012 07:28
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Python Script To Print Current Laptop Battery Power
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power_now.py
#!/usr/bin/python
def main():
power_now = open("/sys/class/power_supply/BAT0/energy_now", "r").readline()
power_full = open("/sys/class/power_supply/BAT0/energy_full", "r").readline()
print float(power_now)/float(power_full) * 100 , "%"
if __name__ == "__main__":
main()
@jose-almir
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Hi, on my system the energy_now file is called charge_now, I see you wrote this 7 years ago. Thanks for sharing.

@SeanBeagle
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Check and see if you have this file to get the percentage directly: /sys/class/power_supply/BAT0/capacity

@imvickykumar999
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i got this error...

FileNotFoundError Traceback (most recent call last)
in
----> 1 power_now = open("/sys/class/power_supply/BAT0/energy_now", "r").readline()
2 power_full = open("/sys/class/power_supply/BAT0/energy_full", "r").readline()
3 print (float(power_now)/float(power_full) * 100 , "%")

FileNotFoundError: [Errno 2] No such file or directory: '/sys/class/power_supply/BAT0/energy_now'

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