Python output contains extra variables

Question

I have run into an error where a block of code in python 3.7 has caused multiple outputs where one is expected. The code is as follows:

def main():
    length=0;height=0;width=0;volume=0
    length,height,width=getinput(length,height,width)
    volume=processing(length,height,width,volume)
    output(volume)
def getinput(length,height,width):
    length, height, width = input("Enter length, height, and width:").split(',')
    length = int(length)
    height = int(height)
    width = int(width)
    return length,height,width
def processing(length,height,width,volume):
    volume = length * height * width
    return length,height,width,volume
def output(volume):
    print("the volume of the prism is:", volume)
main()

The output should be:

the volume of the prism is: 400

The output is:

the volume of the prism is: (20, 10, 2, 400)

output prints volume, which comes from processing, which returns length,height,width,volume. Four outputs are expected. If you are expecting one, return volume from processing. — Amadan
– Amadan, Commented Dec 3, 2015 at 4:06

Mayukh Sarkar · Accepted Answer · 2015-12-03 04:21:29Z

1

In your def processing(length,height,width,volume) function, the return statement is return length,height,width,volume which basically means that you are returning a tuple and when you are catching it into a variable called volume, it becomes a tuple. See in the output you have (20, 10, 2, 400). The braces shows that it is a tuple. You can also confirm that by printing type(volume). If you want to get 400 as an answer, please do output(volume[3]).

answered Dec 3, 2015 at 4:21

Mayukh Sarkar

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Jim K · Accepted Answer · 2015-12-03 04:21:56Z

0

You probably meant to do this:

>>> def processing(length,height,width,volume):
...     volume = length * height * width
...     return volume
...
>>> main()
Enter length, height, and width:20, 10, 2
the volume of the prism is: 400

answered Dec 3, 2015 at 4:21

Jim K

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