def to_ndarray(data: torch.Tensor | np.ndarray | Sequence | int | float) -> np.ndarray:
    """Convert objects of various python types to :obj:`numpy.ndarray`.

    Supported types are: :class:`numpy.ndarray`, :class:`torch.Tensor`,
    :class:`Sequence`, :class:`int` and :class:`float`.

    Args:
        data (torch.Tensor | numpy.ndarray | Sequence | int | float): Data to
            be converted.

    Returns:
        numpy.ndarray: The converted ndarray.
    """
    if isinstance(data, torch.Tensor):
        return data.numpy()
    elif isinstance(data, np.ndarray):
        return data
    elif isinstance(data, Sequence):
        return np.array(data)
    elif isinstance(data, int):
        return np.ndarray([data], dtype=int)
    elif isinstance(data, float):
        return np.array([data], dtype=float)
    else:
        raise TypeError(f"type {type(data)} cannot be converted to ndarray.")
Convert objects of various python types to :obj:`numpy.ndarray`.

    Supported types are: :class:`numpy.ndarray`, :class:`torch.Tensor`,
    :class:`Sequence`, :class:`int` and :class:`float`.

    Args:
        data (torch.Tensor | numpy.ndarray | Sequence | int | float): Data to
            be converted.

    Returns:
        numpy.ndarray: The converted ndarray.
    
opensora/utils/misc.py