I'm pretty new to Python so I am still just learning the language. One of the things I came across was reassigning sys.stdout to change the default output of print. So I wrote this as a test:

import sys
sys.stdout = open('log.txt','a')
print('hey')
sys.stdout.close()
sys.stdout = sys.__stdout__
print('hi')

Now the string 'hi' is not written to the file but it does not show in the default output either. When I assign some other variable to sys.stdout in the beginning and change it back it works, but I'm just wondering why its not changing back the first time.