Question

in python, "Write a function that takes a string and uses a list comprehension to return the vowels of the string"

##my idea here is to search each letter/element in the variable 'vowels' and see if there are any element matches in 'word' (i used the word "cornucopia") and then return vowels.

def vl(word):
_if w in word == v in vowels:
__print i
_else:
__print 'no vowel letters!'

##im confused on using functions for strings compared to floats, as well as using index to search for a matching element between two strings.

Answer 1

list comprehensions let you assemble a list logically, they're pretty powerful and very concise. Here is an example that does the opposite of what you need, except from a string literal instead of a variable.
[x for x in "atest" if x not in ['a','e','i','o','u','y']]

The whole thing is in square brackets to say that it's going to be a list, then you decide what it's going to be a list of, in this case 'x'. then you write the logic to decide what x is, 'for x in "atest" if ....'

I've done many single line solutions on projecteuler using list comprehensions, they're pretty great once you wrap your head around them.

Answer 2

excellent, thanks! i have a much greater understanding of it now!