def rel_path_from_chan_path(chan_path, channeldir, windows=False):
    """
    Convert `chan_path` as obtained from a metadata provider into a `rel_path`
    suitable for accessing the file from the current working directory, e.g.,
    >>> rel_path_from_chan_path('Open Stax/Math', 'content/open_stax_zip/Open Stax')
    'content/open_stax_zip/Open Stax/Math'
    """
    if windows:
        chan_path_list = chan_path.split('\\')
    else:
        chan_path_list = chan_path.split('/')
    chan_path_list.pop(0)  # remove the channel root dir
    rel_path = os.path.join(channeldir, *chan_path_list)
    return rel_path
Convert `chan_path` as obtained from a metadata provider into a `rel_path`
    suitable for accessing the file from the current working directory, e.g.,
    >>> rel_path_from_chan_path('Open Stax/Math', 'content/open_stax_zip/Open Stax')
    'content/open_stax_zip/Open Stax/Math'