code: def JoinPath(stem="", *parts):
    
    # Ensure all path components are unicode
    parts = [SmartUnicode(path) for path in parts]
  
    result = (stem + NormalizePath(u"/".join(parts))).replace("//", "/")
    result = result.rstrip("/")
  
    return result or "/"
docs: A sane version of os.path.join.
  
    The intention here is to append the stem to the path. The standard module
    removes the path if the stem begins with a /.
  
    Args:
       stem: The stem to join to.
       *parts: parts of the path to join. The first arg is always the root and
         directory traversal is not allowed.
  
    Returns:
       a normalized path.