Concurrent.futures>在命令行中运行良好，而不是在使用pyinstaller或py2exe编译时

Question

I have a very simple script based on concurrent.futures that works well in command line (Python 2.7), but crashes when compiled with py2exe or Pyinstaller (the compiled program opens an increasing number of processes and eventually completely blocks windows if I don't kill them all first).

The code is very standard/simple so I struggle to understand the origin of this issue... Has anyone experienced this earlier? (I found discussions related to a similar issue with multiprocessing... but nothing that I could use to solve my problem)

# -*- coding: utf8 -*-
import os
import socket
import concurrent.futures

def simple_checkDomain(aDomain):
    print aDomain 
    # Do other stuff

def main():

    with concurrent.futures.ProcessPoolExecutor(max_workers=4) as executor:
        for domain in ["google.com","yahoo.com"]:
            job = executor.submit(simple_checkDomain, domain)

if __name__ == "__main__":
    main()

Best regards, S

Answer 1

I was having this issue with cx_freeze in Python 3.4. After a bit more google searches I landed on this bug report: http://bugs.python.org/issue21505

That sent me to the following docs and in my app, it seemed to fix the issue.

The suggested solution for Python 2.7, straight from the docs: multiprocessing.freeze_support

Not sure if this will fix it for the py2exe or Pyinstaller that you are using but figured I would post in case.