Recording Battery Life of RPi

Pi_Bat_Timetest.py

# By J. Vlaskamp and M. Ali

import os
import sys
import time
import datetime

tstamp = time.time()
st = datetime.datetime.fromtimestamp(tstamp).strftime('Test staterd at %Y-%m-%d %H:%M:%S\n')
print st

filename = "test_output.txt"
file = open(filename,"w")
file.write("Start Test\n")
file.write(st)
file.write("\n")
file.close

i=0
while True:
    file.flush()    # flush out file
    i=i+1
#    print i
    time.sleep(60)  # Delay for 1 minute (60 seconds)
#    print i
    file = open(filename,"a")
    tstamp = time.time()
    st = datetime.datetime.fromtimestamp(tstamp).strftime('%Y-%m-%d %H:%M:%S\n')
    file.write(st)
    file.write(str(i))
    print i, st
    file.write("\n")
    file.close

# test code
#    if i==3:
#        file = open(filename,"a")
#        file.write("test")
#        file.write("\n")
#        file.close
#    break
#        sys.exit()

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