Palindrome test

test.py

import os, psutil
import random
import string

large_string = "".join([random.choice(string.ascii_letters + string.punctuation) for _ in range(0, 500000)])

process = psutil.Process(os.getpid())

def is_palindrome(str_array):
    str_array = str_array.lower()
    one_way_gen = filter(lambda i:i.isalpha(), str_array)
    reverse_way_gen = filter(lambda i:i.isalpha(), reversed(str_array))
    return all(a==b for a,b in zip(one_way_gen, reverse_way_gen))

# Aprox 14909440 for empty program just generating string
# Same value for 14352384 making generic Facebook  kind of comparison
# 14880768 for generator-based comparison
looks_like_reversed_is_iterator = is_palindrome(large_string)
print(looks_like_reversed_is_iterator)
print(process.memory_info().rss)