在Python里如何手工進行延遲

import time
time.sleep(5) # Delays for 5 seconds. You can also use a float value.

import timewhile True:
 print("This prints once a minute.")
 time.sleep(60) # Delay for 1 minute (60 seconds).

from time import sleep
sleep(0.1) # Time in seconds.

>>> from time import sleep
>>> sleep(4)

>>> def party_time():
... print('hooray!')
... 
>>> sleep(3); party_time()
hooray!

from concurrent.futures import ThreadPoolExecutor, ProcessPoolExecutor, as_completed
from time import sleep, time
def party_later(kind='', n=''):
 sleep(3)
 return kind + n + ' party time!: ' + __name__
def main():
 with ProcessPoolExecutor() as proc_executor:
 with ThreadPoolExecutor() as thread_executor:
 start_time = time()
 proc_future1 = proc_executor.submit(party_later, kind='proc', n='1')
 proc_future2 = proc_executor.submit(party_later, kind='proc', n='2')
 thread_future1 = thread_executor.submit(party_later, kind='thread', n='1')
 thread_future2 = thread_executor.submit(party_later, kind='thread', n='2')
 for f in as_completed([
 proc_future1, proc_future2, thread_future1, thread_future2,]):
 print(f.result())
 end_time = time()
 print('total time to execute four 3-sec functions:', end_time - start_time)
if __name__ == '__main__':
 main()

thread1 party time!: __main__
thread2 party time!: __main__
proc1 party time!: __mp_main__
proc2 party time!: __mp_main__
total time to execute four 3-sec functions: 3.4519670009613037