Sleeper function that sleeps for 1 sec and then returns its argument

sleeper_fun.py

import time #to measure the execution time

def sleeper_function(x):
    time.sleep(1)
    return x

# Execute the function 4 times and measure the execution time
start = time.time()
results = [sleeper_function(x) for x in range(4)]
print("duration =", time.time() - start)
print("results =", results)

# duration = 4.004324674606323
# results = [0, 1, 2, 3]