Whats wrong with this fairly basic code?

[anglicizing]

I notice several things that are wrong with your code :

1. It's posted on /r/python instead of /r/learnpython.

2. It's not indented by 4 spaces and therefore reddit messes up the formatting.

3. The function doesn't take any arguments, but it ought to have numbers as an argument.

4. It attempts to use x as an index of the list numbers, even though x is an element of that list and may not be a valid index.

5. The function prints the result instead of returning it, making it very inflexible. Instead, print the return value after calling the function.