Function jupyter_dependencies_are_installed

src/black/handle_ipynb_magics.py:51–61

(*, warn: bool)

@lru_cache
def jupyter_dependencies_are_installed(*, warn: bool) -> bool:
    installed = (
        find_spec("tokenize_rt") is not None and find_spec("IPython") is not None
    )
    if not installed and warn:
        msg = (
            "Skipping .ipynb files as Jupyter dependencies are not installed.\n"
            'You can fix this by running ``pip install "black[jupyter]"``'
        )
        out(msg)
    return installed


def validate_cell(src: str, mode: Mode) -> None: