简单并发

shutil 高级文件操作

concurrent.futures 多线程

from concurrent.futures import ThreadPoolExecutor
import shutil
all_tsk = []
with ThreadPoolExecutor(max_workers=4) as e:
    all_tsk.append( e.submit(shutil.copy, 'src1.txt', 'dest1.txt') )
    all_tsk.append( e.submit(shutil.copy, 'src2.txt', 'dest2.txt') )
    all_tsk.append( e.submit(shutil.copy, 'src3.txt', 'dest3.txt') )
    all_tsk.append( e.submit(shutil.copy, 'src4.txt', 'dest4.txt') )
    for future in all_tsk: # 还是串行！
        # do something to future.result()
    for future in as_completed(all_tsk): # 实现并行！
        # do something to future.result()
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TODO multiprocessing 多进程

from multiprocessing import Process
p = Process(target=tgt_fcn,args=tgt_fcn_args))
p.start()
p.join()
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TODO subprocess

• subprocess.Popen
  • os.popen
• subprocess.run subprocess.call
  • os.system

itertools

无穷迭代

基于已有迭代

排列组合

TODO c++