print output python to file

import sys

# only this print call will write in the file
print("Hello Python!", file=open('output.txt','a'))

# not this one (std output)
print("Not written")

# any further print will be done in the file
sys.stdout = open('output.txt','wt')
print("Hello Python!")

print("Hello stackoverflow!", file=open("output.txt", "a"))
print("I have a question.", file=open("output.txt", "a"))

with open("output.txt", "a") as f:
    print("Hello StackOverflow!", file=f)
    print("I have a question.", file=f)