The issue occurs when the custom __repr__ is defined via partialmethod:
from functools import partialmethod
from typing import NamedTuple
def my_pprint(obj, **options):
return "Hello World"
def add_custom_pprint(cls=None, **options):
if cls is None:
def decorator(cls):
return add_custom_pprint(cls, **options)
return decorator
cls.__repr__ = partialmethod(my_pprint, **options)
return cls
@add_custom_pprint
class MyNamedTuple(NamedTuple):
x: int
y: int
x = MyNamedTuple(1, 2)
print(x) # "Hello World"
display(x) # (1, 2) without partialmethod, both display and print give the same result:
from typing import NamedTuple
def my_pprint(obj, **options):
return "Hello World"
def add_custom_pprint(cls=None, **options):
if cls is None:
def decorator(cls):
return add_custom_pprint(cls, **options)
return decorator
cls.__repr__ = my_pprint
return cls
@add_custom_pprint
class MyNamedTuple(NamedTuple):
x: int
y: int
x = MyNamedTuple(1, 2)
print(x) # "Hello World"
display(x) # "Hello World"
The issue occurs when the custom
__repr__is defined viapartialmethod:without partialmethod, both display and print give the same result: