Python Access logging of another program ran in subprocess

[p.infante413 at gmail.com]

Hello, I'm currently running another Python program (prog2.py) in my program via subprocess. 

input_args = ['python', '/path/to/prog2.py'] + self.chosen_args
file = open("logfile.txt",'w')
self.process = Popen((input_args), stdout=file)

However, the logs that prog2.py contains still show at the terminal since logs are not covered in the stdout module and printed in the terminal, also, the logfile.txt is empty. Is there a way I can access those logs while in prog1.py? I can't modify prog2.py since it is not mine. I'm stuck here for days now, any tips or help will do.