I need help getting the correct output for my function. *Check comments for more info*

Question

def run_sim(stops, boarding_rate, exiting_rate, passengers):

  stop_count = 1

  while stop_count <= stops:

    if stop_count == stops:

      boarding = 0

      departing = passengers

    else:

      boarding = boarding_rate

      departing = min(passengers, exiting_rate)

    print(f"{stop_count:^10d}{passengers:^10d}{boarding:^10d}{departing:^10d}")

    stop_count += 1

    if stop_count <= stops:

      passengers = calc_boarded(boarding, departing, passengers)

  print(f"Final Stop: {passengers} on the bus")*line that needs removed*

print(run_sim(10, 15, 10, 5))

Answer 1

Hi, I think the problem going on here is that your function run_sim is not returning anything, so when you go to print it in the final line, there is nothing to print. There are two ways to address this. The simple way is to not print when you run the function.

run_sim(10, 15, 10, 5) #Replaces the final line. No print statement.

When we run it all the code inside executes, including the prints. Putting a print around this line would print the return value, which the function does not have one, so it prints None.

You could also return your final numbers and print it outside the function. That looks something like:

return passengers #Replace the print inside the function with a return

function_output = run_sim(10, 15, 10, 5) #Save the returned output to a variable

print(f"Final Stop: {function_output} on the bus") #print the variable with format

You don't even need to save the output to a variable, and run it inside the f-string. The first method is easier. I personally like my functions to always return something useful just in case I need it later in the code. It is up to you.

Note that we can't run the code because we don't have the calc_boarded function. So I wasn't able to check whether it gives the output that you need, but from what you explained in your comments I think this was the issue.

Answer 2

def run_sim(stops, boarding_rate, exiting_rate, passengers):

stop_count = 1

while stop_count <= stops:

if stop_count == stops:

boarding = 0

departing = passengers

else:

boarding = boarding_rate

departing = min(passengers, exiting_rate)

print(f"{stop_count:^10d}{passengers:^10d}{boarding:^10d}{departing:^10d}")

stop_count += 1

if stop_count <= stops:

passengers = calc_boarded(boarding, departing, passengers)

print(f"Final Stop: {passengers} on the bus")

run_sim(10, 15, 10, 5)

please find the corrected code.