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+--- Thread: having issues with the int() function (/thread-29864.html)
having issues with the int() function - megu - Sep-23-2020
Hi I'm currently working through an exercise and having trouble with it
The problem is,
Write a program which repeatedly reads numbers until the
user enters “done”. Once “done” is entered, print out the total, count,
and average of the numbers. If the user enters anything other than a
number, detect their mistake using try and except and print an error
message and skip to the next number.
My code:
a = []
while True:
x = input('Enter a number: ')
if x == 'done':
break
else:
try:
int(x)
a.append(x)
except ValueError:
print('Not a number')
print(len(a), sum(a), sum(a)/len(a))Error:Traceback (most recent call last):
File "C:\Users\elong\OneDrive\Desktop\Python\playground.py", line 13, in <module>
print(len(a), sum(a), sum(a)/len(a))
TypeError: unsupported operand type(s) for +: 'int' and 'str'RE: having issues with the int() function - ndc85430 - Sep-23-2020
int returns the converted value, so it doesn't modify x. You're just throwing away the returned value on line 8, instead of appending it to your list.
RE: having issues with the int() function - perfringo - Sep-23-2020
If using 3.8 <= Python then it is possible to take advantage of assignment expression (walrus operator) and instead of
while True write:while (answer := input('Enter a number: ')) != 'done':