Palindrome Code | Dataford Interview Questions

Tech Mahindra monitoring tools receive alert labels that may contain spaces, punctuation, and mixed letter casing. Write a function that determines whether an alert label is a palindrome after keeping only alphanumeric characters and comparing letters without case sensitivity.

A string is a palindrome if it reads identically from left to right and right to left after normalization.

Formal Specification

Implement is_palindrome(text), where text is a string. Return True if the normalized string is a palindrome; otherwise, return False. The normalized string must contain only characters for which Python's isalnum() returns True, converted to lowercase.

Constraints

1 <= len(text) <= 10^5
text may contain letters, digits, spaces, and punctuation
Comparison is case-insensitive
An empty normalized string is considered a palindrome

Function Signature

def is_palindrome(text):

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