Pytest 5 Remote PDB

conftest.py

import socket
import pdb

def pytest_addoption(parser):
    parser.addoption("--remote-pdb", action='store_true',
                     help="Opens a remote pdb on localhost:8050. Works with xdist")

def pytest_exception_interact(node, call, report):
    if node.config.option.remote_pdb:
        tb = call.excinfo._excinfo[2]
        remote_post_mortem(tb)

def remote_post_mortem(tb):
    listen_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    listen_socket.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, True)
    listen_socket.bind(('127.0.0.1', 8010))
    listen_socket.listen(1)
    connection, address = listen_socket.accept()
    handle = connection.makefile('rw')

    # Copied from pdb.post_mortem
    p = pdb.Pdb(stdin=handle, stdout=handle)
    p.reset()
    p.interaction(None, tb)