7

我对 Python 和 Pyro4 比较陌生。因此,我尝试遵循此页面Pyro - Python Remote Objects - 4.41的第二个示例,但是当我运行服务器时抛出此异常:

Traceback (most recent call last):
  File "greeting-server.py", line 10, in <module>
    ns = Pyro4.locateNS()                  # find the name server
  File "/usr/lib/python2.7/dist-packages/Pyro4/naming.py", line 344, in locateNS
    raise e
Pyro4.errors.NamingError: Failed to locate the nameserver

代码服务器:

# saved as greeting-server.py
import Pyro4

class GreetingMaker(object):
    def get_fortune(self, name):
        return "Hello, {0}. Here is your fortune message:\n" \
               "Tomorrow's lucky number is 12345678.".format(name)

daemon = Pyro4.Daemon()                # make a Pyro daemon
ns = Pyro4.locateNS()                  # find the name server
uri = daemon.register(GreetingMaker)   # register the greeting maker as a Pyro object
ns.register("example.greeting", uri)   # register the object with a name in the name server

print("Ready.")
daemon.requestLoop()                   # start the event loop of the server to wait for calls

首先在另一个终端运行 pyro-ns:

$pyro-ns
*** Pyro Name Server ***
Name server listening on: ('0.0.0.0', 9090)

WARNING: daemon bound on hostname that resolves to loopback address 127.0.x.x 

URI is: PYRO://127.0.1.1:9090/7f0001011d2a21ca9fb63702dd216e1143
URI written to: /home/guille/Documents/pyro examples/Pyro4-master/examples/banks/Pyro_NS_URI
Name Server started.

备注:我在 Debian 8 上工作并且我已经安装了:

运行这个例子

也许我错过了什么。任何想法为什么这不起作用,或者我做错了什么?提前致谢。

4

3 回答 3

10

这对我有用:

首先在另一个终端运行 python -m Pyro4.naming:

Not starting broadcast server for localhost.
NS running on localhost:9090 (127.0.0.1)
URI = PYRO:Pyro.NameServer@localhost:9090

而不是我之前为 pyro4 做过的 pyro-ns,因为你看到这个过程发生了变化

于 2015-12-28T20:26:08.560 回答
5

虽然文档中的 URI 方法很棒,但另一种连接方式是使用 Pyro4 SimpleServe注册域/IP

编辑: 这是为与 Python 3 一起使用而编写的,感谢@Cyber​​guille 指出在使用 Python 2.x 时应该使用raw_input而不是客户端代码上的输入

服务器

请注意,0.0.0.0 将其暴露给世界

# saved as greeting-server.py
import Pyro4

@Pyro4.expose
class GreetingMaker(object):
    def get_fortune(self, name):
        return "Hello, {0}. Here is your fortune message:\n" \
               "Behold the warranty -- the bold print giveth and the fine print taketh away.".format(name)

Pyro4.Daemon.serveSimple({
    GreetingMaker: 'Greeting',
}, host="0.0.0.0", port=9090, ns=False, verbose=True)

然后运行​​python greeting-server.py启动脚本

客户

# saved as greeting-client.py
import Pyro4

ipAddressServer = "" # TODO add your server remote IP here

# Works for Python3, see edit above for notes on Python 2.x
name = input("What is your name? ").strip()

greetingMaker = Pyro4.core.Proxy('PYRO:Greeting@' + ipAddressServer + ':9090')
print(greetingMaker.get_fortune(name))   # call method normally
于 2018-06-29T22:15:59.820 回答
2

我认为你在这里混合了 python 3 和 python 2 版本,因为你写道你必须同时安装 'pyro4' 和 'python2-pyro4' 包。我怀疑前者适用于 python 3,后者是旧版 python 2。

'pyro-ns' shell 命令似乎启动了一个旧的、不兼容的名称服务器版本。

于 2016-01-02T13:03:18.900 回答