Function _matplotlib_manages_backends

IPython/core/pylabtools.py:455–478

Return True if Matplotlib manages backends, False otherwise. If it returns True, the caller can be sure that matplotlib.backends.registry.backend_registry is available along with member functions resolve_gui_or_backend, resolve_backend, list_all, and list_gui_frameworks. This f

()

def _matplotlib_manages_backends() -> bool:
    """Return True if Matplotlib manages backends, False otherwise.

    If it returns True, the caller can be sure that
    matplotlib.backends.registry.backend_registry is available along with
    member functions resolve_gui_or_backend, resolve_backend, list_all, and
    list_gui_frameworks.

    This function can be removed as it will always return True when Python
    3.12, the latest version supported by Matplotlib < 3.9, reaches
    end-of-life in late 2028.
    """
    global _matplotlib_manages_backends_value
    if _matplotlib_manages_backends_value is None:
        try:
            from matplotlib.backends.registry import backend_registry

            _matplotlib_manages_backends_value = hasattr(
                backend_registry, "resolve_gui_or_backend"
            )
        except ImportError:
            _matplotlib_manages_backends_value = False

    return _matplotlib_manages_backends_value


def _list_matplotlib_backends_and_gui_loops() -> list[str]: