def distance_to_end(file_obj):
    """
    For an open file object how far is it to the end

    Parameters
    ----------
    file_obj: open file- like object

    Returns
    ----------
    distance: int, bytes to end of file
    """
    position_current = file_obj.tell()
    file_obj.seek(0, 2)
    position_end = file_obj.tell()
    file_obj.seek(position_current)
    distance = position_end - position_current
    return distance
For an open file object how far is it to the end

    Parameters
    ----------
    file_obj: open file- like object

    Returns
    ----------
    distance: int, bytes to end of file