On a Windows 10 enterprise computer the following multiprocessing code block evaluates differently for two execution commands. Executing the script directly with PythonSlicer.exe gives the expected result, i.e., output is reported for both main and fun. However, executing the script with slicer.exe --python-script [script] only reports output from main, suggesting that fun has not been called, thereby implying a problem with the multiprocessing. In contrast, on a Mac, both execution approaches (either using python directly, or piping through slicer) return output from both main and fun.
I mostly want to execute the python script using slicer.exe to access the ctk and slicer modules, which I don’t believe I can access from the PythonSlicer.exe python bundle. Any suggestions are much appreciated.
import sys
import time
from multiprocessing import Process
def fun():
outfile = open('test_fun.log','w')
print("Starting fun")
outfile.write('Starting fun\n')
time.sleep(2)
outfile.write('Finishing fun')
print('Finishing fun')
outfile.close()
def main():
p = Process(target=fun)
p.start()
p.join()
if __name__ == '__main__':
print('Starting main')
outfile = open('test_main.log', 'w')
main()
outfile.write('Yes in main()')
outfile.close()
print('Finishing main')
sys.exit(0)