import sys import pytest from pytest import Config from pytest import Parser def pytest_addoption(parser: Parser) -> None: parser.addini("pythonpath", type="paths", help="Add paths to sys.path", default=[]) @pytest.hookimpl(tryfirst=True) def pytest_load_initial_conftests(early_config: Config) -> None: # `pythonpath = a b` will set `sys.path` to `[a, b, x, y, z, ...]` for path in reversed(early_config.getini("pythonpath")): sys.path.insert(0, str(path)) @pytest.hookimpl(trylast=True) def pytest_unconfigure(config: Config) -> None: for path in config.getini("pythonpath"): path_str = str(path) if path_str in sys.path: sys.path.remove(path_str)