Sample concurrency in python

concurrent.py

import math
from concurrent.futures import ThreadPoolExecutor, wait, as_completed
from time import time

x = []

for i in range(105):
    x.append(i)


pool = ThreadPoolExecutor(len(x))

def compute(i):
    return x[i * max_items_per_bucket:(i + 1) * max_items_per_bucket]

max_items_per_bucket = 10
limit = int(math.ceil(len(x) / max_items_per_bucket))
futures = [pool.submit(compute, i) for i in range(limit + 1)]
print(futures)
results = [r.result() for r in as_completed(futures)]

print(results)