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print(flush = True) not working

tanjil
New Contributor III

Hello,

I have the following minimum example working example using multiprocessing:

from multiprocessing import Pool
 
files_list = [('bla', 1, 3, 7), ('spam', 12, 4, 8), ('eggs', 17, 1, 3)]
 
 
def f(t):
  print('Hello from child process', flush = True)
  
  name, a, b, c = t
  return (name, a + b + c)
 
def main():
  pool = Pool(processes=3) # set the processes max number 3  
  result = pool.map(f, files_list)
  pool.close()
  pool.join()
  print('end')
  print(result)
 
if __name__ == "__main__":
  main()

However, I cannot get anything from the child process to print. The aim is use the text for debugging purposes in the future. Any idea why this does not work or if there are any alternative solution to this? Thank you.

2 REPLIES 2

Debayan
Esteemed Contributor III

Hi, Do you receive any error when you say it is not working?

tanjil
New Contributor III

No errors are generated. The code executes successfully, but there the print statement for "Hello from child process" does not work.

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