ChimeraX bug report submission

[Andrei Istrate]

The following bug report has been submitted:
Platform:        macOS-10.16-x86_64-i386-64bit
ChimeraX Version: 1.2.dev202101090324 (2021-01-09 03:24:40 UTC)
Description
There is a problem with using multiprocessing in scripts ran by ChimeraX after the update from Python 3.7 to Python 3.8 on mac.

The problem comes from the requirement to protect the “entry point” of the program by using if __name__ == '__main__'

Like this:

from multiprocessing import Process

def slave(a):
    print(a)

if __name__ == '__main__':
    thread_list = []
    for i in range(4):
        t = Process(target=slave, args=(i,))
        thread_list.append(t)
    for thread in thread_list:
        thread.start()
    for thread in thread_list:
        thread.join()