Confused traceback while floordiv or mod happens between Fraction and complex objects #102840
Description
from fractions import Fraction
a = Fraction(1, 2)
b = a // 1j
>
Traceback (most recent call last):
File "C:\Users\KIRILL-1\CLionProjects\cpython\example.py", line 5, in <module>
b = a // 1j
~~^^~~~
File "C:\Users\KIRILL-1\AppData\Local\Programs\Python\Python311\Lib\fractions.py", line 363, in forward
return fallback_operator(complex(a), b)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: unsupported operand type(s) for //: 'complex' and 'complex'This traceback really confused me.
However, it's easy to fix, just need change these lines:
Lines 620 to 621 in 5e6661b
To this:
elif isinstance(b, complex):
try:
return fallback_operator(complex(a), b)
except TypeError:
raise TypeError(
"unsupported operand type(s) for %r: %r and %r" % (
fallback_operator.__name__,
type(a).__qualname__,
type(b).__qualname__)
) from NoneSo, after that, we have a pretty nice traceback:
Traceback (most recent call last):
File "C:\Users\KIRILL-1\CLionProjects\cpython\example.py", line 5, in <module>
b = a // 1j
~~^^~~~
File "C:\Users\KIRILL-1\CLionProjects\cpython\Lib\fractions.py", line 624, in forward
raise TypeError(
TypeError: unsupported operand type(s) for 'floordiv': 'Fraction' and 'complex'But, here a one problem - would be nice to have in traceback originally // instead of floordiv. I have no idea how to do it, without create a mapping with names. Theoretically - we can add a special attribute for it in operator, but it should be a another discussion.