Python LAB 2.5.1.3 Four simple programs

 Solution for the Empty Line

empty lines in python

If you have reached practice 2.5.1.3 Four simple programs, you will notice a challenge in the bottom of the exercise:

The code has one important weakness - it displays a bogus result when the user enters an empty line. Can you fix it?

Let's see how to fix it.

The problem:

User may enter an empty line or just press Enter without any data.

Solution:

• In case user entered an empty line = a loop + else
• We need to keep prompting user to enter data = input()

line = input("Enter a line of numbers - separate them with spaces: ")

strings = line.split()

total = 0

while strings == []: # If line is empty, string.split() will equal []

    line = input("No data found\nEnter a line of numbers - separate them with spaces: ")

    strings = line.split()

else:

   

    try:

        for substr in strings:

            total += float(substr)

        print("The total is:", total)

    except:

        print(substr, "is not a number.")

Please comment if you have other solutions 👌