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How to use _ensure_module_in_paths method in tox

Best Python code snippet using tox_python

build_isolated.py

Source:build_isolated.py

...4tarball.5"""6import os7import sys8def _ensure_module_in_paths(module, paths):9    """Verify that the imported backend belongs in-tree."""10    if not paths:11        return12    module_path = os.path.normcase(os.path.abspath(module.__file__))13    normalized_paths = (os.path.normcase(os.path.abspath(path)) for path in paths)14    if any(os.path.commonprefix((module_path, path)) == path for path in normalized_paths):15        return16    raise SystemExit(17        "build-backend ({!r}) must exist in one of the paths "18        "specified by backend-path ({!r})".format(module, paths),19    )20dist_folder = sys.argv[1]21backend_spec = sys.argv[2]22backend_obj = sys.argv[3] if len(sys.argv) >= 4 else None23backend_paths = sys.argv[4].split(os.path.pathsep) if sys.argv[4] else []24sys.path[:0] = backend_paths25backend = __import__(backend_spec, fromlist=["_trash"])26_ensure_module_in_paths(backend, backend_paths)27if backend_obj:28    backend = getattr(backend, backend_obj)29basename = backend.build_sdist(dist_folder, {"--global-option": ["--formats=gztar"]})...

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