optionals.py 文件源码

def magic_mime_from_buffer(buffer: bytes) -> str:
    """
    Try to detect mimetype using ``magic`` library.

    .. warning:: :exc:`.OptionalPackageRequirementError` will be raised if ``python-magic`` is not installed.

    :param buffer: buffer from header of file.

    :return: The mimetype
    """

    if magic is None:  # pragma: no cover
        raise OptionalPackageRequirementError('python-magic')

    return magic.from_buffer(buffer, mime=True)


# wand image