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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def clear_cache():
    '''
    Completely clear svnfs cache
    '''
    fsb_cachedir = os.path.join(__opts__['cachedir'], 'svnfs')
    list_cachedir = os.path.join(__opts__['cachedir'], 'file_lists/svnfs')
    errors = []
    for rdir in (fsb_cachedir, list_cachedir):
        if os.path.exists(rdir):
            try:
                shutil.rmtree(rdir)
            except OSError as exc:
                errors.append('Unable to delete {0}: {1}'.format(rdir, exc))
    return errors