TypeError: 'NoneType' object is not callable

[snippsat]

The site you get code from use plain HTML without even a <code> tag to display the code this is bad.
Usually if make a site where people post a lot of code,then have some kind of code box.
If look at source eg:

<span style="background-color:#ffffcc">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; cache[args] = result</span>

A overflow of &nbsp💥
So can get strange result if try to copy code,look like you have written the code over as there are typo's to.
The code work,here a cleaned up versions and i made a few changes.

import time

def memoize(func):
    cache = {}
    def wrapper(*args):
        if args not in cache:
            cache[args] = func(*args)
        return cache[args]
    return wrapper

def timed(func):
    def wrapper(*args):
        start = time.time()
        result = func(*args)
        end = time.time()
        elapsed_time = end - start
        print(f"Elapsed time: {elapsed_time:.6f} seconds")
        return result
    return wrapper

@memoize
@timed
def sum_of_odd_numbers(n):
    return sum(x for x in range(n) if x % 2 == 1)

print(sum_of_odd_numbers(10000000))
print(sum_of_odd_numbers(10000000))

Output:
Elapsed time: 0.759998 seconds
25000000000000
25000000000000