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Managing proxied gateways
==========================
Simple proxying
----------------
Using the ``via`` arg of specs we can create a gateway
whose io is created on a remote gateway and proxied to the master.
The simplest use case, is where one creates one master process
and uses it to control new workers and their environment
::
>>> import execnet
>>> group = execnet.Group()
>>> group.defaultspec = 'popen//via=master'
>>> master = group.makegateway('popen//id=master')
>>> master
<Gateway id='master' receive-live, thread model, 0 active channels>
>>> worker = group.makegateway()
>>> worker
<Gateway id='gw0' receive-live, thread model, 0 active channels>
>>> group
<Group ['master', 'gw0']>
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