Python functions that returns a list of directories in a directory, with fully qualified paths, using ridiculous list constructor that I'm quite proud of

gistfile1.txt

def get_directory_list(dpath):
    '''returns a list of directories in a directory, 
    with fully qualified paths'''
    if not os.path.isdir(dpath):
        raise MyError('oops %s is not a directory'% dpath)
    dirs = [os.path.join(dpath, filename) for filename in os.listdir(dpath) if (os.path.isdir(os.path.join(dpath, filename)))]
    return dirs