12Palindrome Check
Easystrings
Write is_palindrome(text) that returns True if text reads the same forwards and backwards.
Ignore upper/lower case and ignore anything that is not a letter or a digit, so "A man, a plan, a canal: Panama" counts.
Examples
Example 1
>>> is_palindrome('racecar') True
Example 2
>>> is_palindrome('A man, a plan, a canal: Panama') True
Run examples checks the 2 examples above. Submit runs all 7 tests, including hidden edge cases, and marks the challenge solved.