Function set_environ

scrapy/utils/misc.py:222–236

Temporarily set environment variables inside the context manager and fully restore previous environment afterwards

(**kwargs: str)

@contextmanager
def set_environ(**kwargs: str) -> Iterator[None]:
    """Temporarily set environment variables inside the context manager and
    fully restore previous environment afterwards
    """

    original_env = {k: os.environ.get(k) for k in kwargs}
    os.environ.update(kwargs)
    try:
        yield
    finally:
        for k, v in original_env.items():
            if v is None:
                del os.environ[k]
            else:
                os.environ[k] = v


def walk_callable(node: ast.AST) -> Iterable[ast.AST]: