Help With Error Handling

[jo15765]

Hello - I am new to python and am attempting to validate that the user input is a number with my script. I have the below syntax, but instead of actually presenting my expected message, I get the below...

What do I need to change in my python syntax in order to get my desired error message?

Error:
Traceback (most recent call last):

  File "<ipython-input-8-cfa0bf62612b>", line 1, in <module>
    runfile('/home/owner/.config/spyder/temp.py', wdir='/home/owner/.config/spyder')

  File "/usr/local/lib/python2.7/dist-packages/spyder_kernels/customize/spydercustomize.py", line 668, in runfile
    execfile(filename, namespace)

  File "/usr/local/lib/python2.7/dist-packages/spyder_kernels/customize/spydercustomize.py", line 100, in execfile
    builtins.execfile(filename, *where)

  File "/home/owner/.config/spyder/temp.py", line 24, in <module>
    age = inputage("How old are you?")

  File "/home/owner/.config/spyder/temp.py", line 16, in inputage
    userInput = int(input(message))

  File "/usr/local/lib/python2.7/dist-packages/ipykernel/ipkernel.py", line 176, in <lambda>
    builtin_mod.input = lambda prompt='': eval(self.raw_input(prompt))

  File "<string>", line 1, in <module>

NameError: name 's' is not defined

And this is the syntax that I am trying:

def inputage(message):
  while True:
    try:
       userInput = int(input(message))       
    except ValueError:
       print("Not an integer! Try again.")
       continue
    else:
       return userInput 
       break 
     
age = inputage("How old are you?")

if (age>=18):
  print("You are over 18")
else:
  print("You are under 18")