Default function in python shell [duplicate]

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?

Answer 1

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