数据库访问用户', passwd='数据库访问密码', db='数据库名', port=3306)
cur = conn.cursor()
cur.execute('SELECT `id`, `name`, `path...`, FROM `doc_file`')
# 获取全部记录
results=cur.fetchall()
for r in results:
id, name, path = r[0], r[...1], r[2]
if path and not os.path.exists(path):
print 'file not exist: ', id, name, path,