Is it possible to modify what is printed to stdout in Python?

Question

In Python, overriding sys.excepthook makes it possible to modify what is printed to stderr when there is an exception:

>>> import sys >>> sys.excepthook = lambda _, x, __: print('ERROR:', x) >>> a ERROR: name 'a' is not defined

I'm looking for a similar functionality for stdout also. Is it possible to do this in Python?

>>> type(5) <class 'int'> >>> # some magical operations >>> type(5) <sinif 'tamsayi'>

Here <sinif 'tamsayi'> is translation of original output to Turkish. This is just an example and I'm not trying to modify type's output specifically. I'm looking for a way to inspect what is going to written to stdout and modify it according to my needs just like in the case of what I've shown for stderr.

You can reassign sys.stdout to any file-like object. The original stdout will be kept in sys.__stdout__. — MatsLindh
– MatsLindh, Commented Jan 8, 2021 at 10:21
@Qiu I should have checked the sys before asking this. Just by looking at the name I can say that this is what I'm looking for most probably. — sahinakkaya
– sahinakkaya, Commented Jan 8, 2021 at 10:22

Tomerikoo · Accepted Answer · 2021-01-08 10:29:04Z

1

You're probably looking for sys.displayhook:

import sys def my_output(x): #some magical operations sys.displayhook = my_output

edited Jan 8, 2021 at 10:29

Tomerikoo

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answered Jan 8, 2021 at 10:15

Qiu

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1 Comment

sahinakkaya Over a year ago

sys.excepthook for showing exceptions and sys.displayhook for displaying other things :D Super intuitive! Thanks for the answer!

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