阻止sys.stdout写入文本文件

Question

I am using python sys to save my stdout to a text file.

sys.stdout=open('OLSYield.txt','w')

However I only want a portion of the stdout to go to the text. How do I stop writing to txt file and redirect back to the terminal or console?

So it should look something like

sys.stdout=open('OLSYield.txt','w')
print "helloWorld appears in text file"

sys.stdout=close('OLSYield.txt','w')
print "helloWorld appears in console"

Im not sure what command I should use to close stdout=open

Answer 1

to change the output back to the console you need to keep a reference to the original stdout:

orig_stdout = sys.stdout
sys.stdout=open('OLSYield.txt','w')
print "helloWorld appears in text file"

sys.stdout.close()
sys.stdout=orig_stdout 
print "helloWorld appears in console"

Answer 2

You can stop writing to your file and revert to the console like this:

sys.stdout = open("file.txt", "w")
print "in file"

sys.stdout.close()
sys.stdout = open("/dev/stdout", "w")

print "in console"