[Tutor] Python Code Not Working

[jeremygainey14 at gmail.com]

Everytime I run this it says test is not defined . I don’t understand. Can someone please help correct? 

#Question 10

def reverse(mystr):
    reversed = ''
    for char in mystr:
        reversed = char + reversed
    return reversed

def is_palindrome(myStr):
    if myStr in reverse(myStr):
        return True
    else:
        return False

test(is_palindrome("abba"))
test(not is_palindrome("abab"))
test(is_palindrome("tenet"))
test(not is_palindrome("banana"))
test(is_palindrome("straw warts"))
test(is_palindrome("a"))
test(is_palindrome(""))

-Jeremy Gainey