import random as rnd
import threading
import time
import matplotlib.pyplot as plt

def racer(number, seed):
    rnd.seed(seed)
    start = time.time()
    duration = rnd.randint(1, 10)
    time.sleep(duration)
    end = time.time()
    results[number] = f"Racer {number} in {end - start}"


n = 20
threads = []
results = {}
total_start = time.time()

for car in range(n):
    rand = rnd.random()
    threads.append(threading.Thread(target=racer, args=(car, rand)))
    threads[car].start()

for car in range(n):
    threads[car].join()

fig, ax = plt.subplots()

"""
ax.plot(
    [car for car in range(n)],
    [results[car] for car in range(n)]
)
"""

ax.bar(
    [car for car in range(n)],
    [results[car] for car in range(n)]
)

ax.set(
    xlabel="Racer",
    ylabel="Zeit",
    title="Rennen",
)

ax.grid(True)

plt.show()