我正在尝试使用单线程运行问题，然后使用多线程运行相同的问题以显示两次运行执行的差异，但是，运行时间似乎相同，所以我想这是因为线程没有同时运行（并行）。所以如果有人可以请告诉我如何同时运行它们。

import threading, time

def fib(n):
    if n <= 1:
        return 1
    return fib(n - 1) + fib(n - 2)

def fib_caller(l):
    global list
    for i in range(10):
        x = fib(l[i])
        print(x)
        list[i] = x



if __name__ == '__main__':
    list = [1, 37, 1, 37, 1, 37, 1, 37, 1, 37]

    choice = input(
        "Please choose whether to :nSingle-threaded process : Enter snornMulti-threaded 
process  : Enter mn")

    begin = time.time()

    if choice == 's' or 'S':
        t = threading.Thread(name="Single thread", target=fib_caller, args=(list, ))
        t.start()
        t.join()
    elif choice == 'm' or 'M':
        t1 = threading.Thread(name="Single thread", target=fib_caller, args=(list[0:2]))
        t1.start()
        t1.join()
        t2 = threading.Thread(name="Single thread", target=fib_caller, args=(list[2:4]))
        t2.start()
        t2.join()
        t3 = threading.Thread(name="Single thread", target=fib_caller, args=(list[4:6]))
        t3.start()
        t3.join()
        t4 = threading.Thread(name="Single thread", target=fib_caller, args=(list[6:8]))
        t4.start()
        t4.join()
        t5 = threading.Thread(name="Single thread", target=fib_caller, args=(list[8:10]))
        t5.start()
        t5.join()
    else:
        print('Invalid Input.')

    print(list)

end = time.time()
total = end - begin
print("Total execution time: " + str(total))

回答