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Support echoing output from other clients...
Support echoing output from other clients in the zmq console Can result in outputs like: ``` In [1]: 1 [remote]In [1]: 1 [remote]Out[1]: 1 [remote]In [2]: 3 [remote]Out[2]: 3 Out[3]: 1 ``` Note that there will be inconsistencies in prompt numbers because some execution may take place after the in-prompt is drawn.

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logtopics.rst
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Log Topic Specification

we use pyzmq to broadcast log events over a PUB socket. Engines, Controllers, etc. can all broadcast. SUB sockets can be used to view the logs, and ZMQ topics are used to help select out what to follow.

the PUBHandler object that emits the logs can ascribe topics to log messages. The order is:

<root_topic>.<loglevel>.<subtopic>[.<etc>]

root_topic is specified as an attribute