average_power_dissipation.py

from sys import argv

def main(argv): 
    script, filename = argv 

    data = get_voltage_current(filename)
    sum = 0
    for item in data:
        if item['current'] > 0:
            sum = sum + (item['voltage'] * item['current'])
    average_power_dissipation = sum / len(data)
    
    print format(average_power_dissipation, 'f')

def get_voltage_current(filename):
    f = open(filename, 'r')

    data = []
    voltage = ""
    current = ""
    while True:
        item = f.readline()
	if not item: break
	
        #POWER_SUPPLY_VOLTAGE_NOW=3846129
        keyValue = item.split('=')
        
        if len(keyValue) == 1: continue #next record

        key, value = keyValue
        if key == "POWER_SUPPLY_VOLTAGE_NOW":
            voltage = float(value)
        if key == "POWER_SUPPLY_CURRENT_NOW":
            current = float(value)

        if voltage != "" and current != "":
            data.append({'voltage' : voltage, 'current' : current})
            voltage = ""
            current = ""

    f.close

    return data
   

if  __name__ =='__main__':
    main(argv)