Question

This program will compute the total mileage for all trips included in the file attached, as well as the fuel efficiency in miles per gallon. trip.txt contains: the trip number mileage gas (in gallons) Your program will open the file, read it line by line and add the miles driven and the gallons gas consumed then calculate the average fuel efficiency. It will then write Once the program has read all the lines, it will write the total miles driven, total gas consumed and the gas miles per gallon to a file called output.txt. You will assume that your txt files are located in the same directory as the code to avoid path issues. Remember that any open file will need to be closed. Example of execution: opening file trip.txt opening file output.txt output.txt will contain: total mileage: 1410 total gas consumed: 67 overall mile per gallon: 21.04

this is the trip.txt file

trip   mileage   gas
1 200 10  
2 400 17
3 800 39
4 10 1  

language: Python

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

#code

def main():
    print('opening trip.txt')
    #opening trip.txt file, will raise exception if not found
    file=open('trip.txt')
    #reading the first line containing labels
    file.readline()
    #initializing total miles and fuel to 0`
    total_miles=0
    total_fuel=0
    #looping through each remaining lines
    for line in file:
        #stripping new line characters and splitting line by space
        fields=line.strip().split(' ')
        #validating resultant array's length
        if len(fields)==3:
            #reading miles and fuel, converting to int
            miles=int(fields[1])
            fuel=int(fields[2])
            #adding to total
            total_miles+=miles
            total_fuel+=fuel
    #closing input file
    file.close()
    #calculating miles per gallon
    miles_per_gallon=total_miles/total_fuel
    #now opening output file, writing results and closing
    print('opening output.txt')
    file=open('output.txt','w')
    file.write('total mileage: {}\n'.format(total_miles))
    file.write('total gas consumed: {}\n'.format(total_fuel))
    file.write('overall miles per gallon: {:.2f}\n'.format(miles_per_gallon))
    file.close()
    print('success')

#invoking main()
main()

#output

opening trip.txt

opening output.txt

success

#output.txt after running the program

total mileage: 1410

total gas consumed: 67

overall miles per gallon: 21.04