In what follows python is an alias for python3.6 or pypy3.6 or any later version (python3.7, pypy3.7 and so on).

Steps to reproduce

Install the latest pip & setuptools packages versions

python -m pip install --upgrade pip setuptools

Build library

python setup.py develop

Open python REPL

python

Execute following statements

>>> from pyo3_missing_rmod import A, B
>>> A() % B()

Expected output:

A.__mod__ is called
B.__rmod__ is called
Traceback (most recent call last):
  File "<input>", line 1, in <module>
TypeError: unsupported operand type(s) for %: 'A' and 'B'

Actual output:

A.__mod__ is called
Traceback (most recent call last):
  File "<input>", line 1, in <module>
TypeError: 'A' object cannot be converted to 'B'