Default function in python shell

Question

Entering an expression in Python shell outputs the repr() of the expression.

Is it possible to set this default function to some user defined function?

Are you looking to change what the `repr()` of an object is or change the actual function the shell calls? — Daniel Walker, Nov 25 '21 at 05:28
Check out [rjb's answer on this other question](/a/43618365/4518341) for a nice implementation. — wjandrea, Nov 25 '21 at 05:29

score 5 · Accepted Answer · answered Nov 25 '21 at 05:27

What you are looking for is sys.displayhook:

sys.displayhook is called on the result of evaluating an expression entered in an interactive Python session. The display of these values can be customized by assigning another one-argument function to sys.displayhook.

Normal behaviour:

>>> from datetime import datetime
>>> datetime.now()
datetime.datetime(2021, 11, 25, 15, 26, 1, 772968)

then

>>> import sys
>>> def new_hook(value):
...   sys.stdout.write(str(value))
...   sys.stdout.write("\n")
... 
>>> sys.displayhook = new_hook

modified behaviour:

>>> datetime.now()
2021-11-25 15:26:14.177267

Default function in python shell

1 Answers1