我是win7, pycharm, python 3.5, 就是拿到代码然后运行main.py，尝试一下程序，遇到如下错误：

我还没有看教学视频，只是想先运行一下程序看一看。这和elasticsearch 版本有关么？ 我的版本是 5.4.0， elasticsearch-dsl 5.3.0

是否还需要设置其他环境？ 必须用virtual environment么？

File "C:\Users\Daniel Cai\AppData\Local\Programs\Python\Python35\lib\site-packages\elasticsearch\connection\http_urllib3.py", line 123, in perform_request

    raise ConnectionError('N/A', str(e), e)

elasticsearch.exceptions.ConnectionError: ConnectionError(<urllib3.connection.HTTPConnection object at 0x0000000006177438>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it) caused by: NewConnectionError(<urllib3.connection.HTTPConnection object at 0x0000000006177438>: Failed to establish a new connection: [WinError 10061] No connection could be made because the target machine actively refused it)