misc.py 文件源码

def makedirs(pathname):
        """Create a directory at the specified location if it does not
        already exist (including any parent directories) re-raising any
        unexpected exceptions as ApiExceptions.
        """

        try:
                os.makedirs(pathname, PKG_DIR_MODE)
        except EnvironmentError as e:
                if e.filename == pathname and (e.errno == errno.EEXIST or
                    os.path.exists(e.filename)):
                        return
                elif e.errno == errno.EACCES:
                        raise api_errors.PermissionsException(
                            e.filename)
                elif e.errno == errno.EROFS:
                        raise api_errors.ReadOnlyFileSystemException(
                            e.filename)
                elif e.errno != errno.EEXIST or e.filename != pathname:
                        raise