Here is my latest version of my addition script. I have tried to take on all the advice I have been given by people like @Janos and @Hosch250 and also tried to keep to the guidelines set by the PEP8 (I recommend it to anyone who hasn't read it yet). Now I have done it, so please tell me if I have missed anything/there is a way to improve.

def main():

def space():
    print(" ")

if __name__ == '__main__':

    print("Type 0 to end")
    while Repeat:
        AddNumber=float(input("Add a number: "))
        if AddNumber == 0:
    for num in Numbers:
        print('{} + {} = '.format(num, Previous1))
        Previous1 += num
    print('All your numbers add up to {}'.format(Previous1))
    input("/n Press ENTER to exit the program")
  • \$\begingroup\$ Also, I know I am going off on a tangent here, but is there a way to change the colour of the output text? \$\endgroup\$ – Joe Dec 12 '15 at 19:43
  • 7
    \$\begingroup\$ Did you actually read the PEP-8 guide? What did it tell you about variable namings? \$\endgroup\$ – Barry Dec 12 '15 at 19:49
  • \$\begingroup\$ You should use conventions \$\endgroup\$ – Joe Dec 12 '15 at 19:51
  • \$\begingroup\$ It is too late to edit it because it would invalidate the answer. \$\endgroup\$ – user34073 Dec 12 '15 at 19:55
  • \$\begingroup\$ You should add a link to the last question so people can compare the two and see were you where compared to now. \$\endgroup\$ – 13aal Dec 12 '15 at 20:08

First things first, PEP-8 recommends snake_case for variable namings. So definitely numbers, repeat, add_number, etc. Also Previous1 isn't a great name - what is the number doing there? Perhaps sum_so_far?

Getting all the Inputs

input() will raise EOFError when we run out of numbers, and the float() conversion will raise ValueError if the user enters not a float. Rather than having a sentinel value input (what if I want to do 1+2+0+4+5?), just use what the language already provides:

def input_numbers(prompt):
    numbers = []
    while True:
        except ValueError:
            # maybe print an error
        except EOFError:
    return numbers

main() and space()

What is main() doing? I could understand:

def main():
    # all the logic here

if __name__ == '__main__':

space() is useless.


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