labscript_utils.ls_zprocess.Context

class labscript_utils.ls_zprocess.Context(io_threads=1, shared_secret=None)

Bases: zprocess.security.SecureContext

Subclass of zprocess.security.SecureContext configured with settings from labconfig, substitutable for a zmq.Context. Can be instantiated to get a unique context, or call the .instance() classmethod to possibly get an already-existing one. Only use the latter if you do not indent to terminate the context.

__init__(io_threads=1, shared_secret=None)

Methods

__init__([io_threads, shared_secret])
destroy([linger])	Close all sockets associated with this context and then terminate the context.
get(option)	Get the value of a context option.
getsockopt(opt)	get default socket options for new sockets created by this Context
instance()	Returns a shared instance with the same shared secret, if there is one, otherwise creates it.
set(option, optval)	Set a context option.
setsockopt(opt, value)	set default socket options for new sockets created by this Context
shadow(address)	Shadow an existing libzmq context
shadow_pyczmq(ctx)	Shadow an existing pyczmq context
socket(*args, **kwargs)	Create a Socket associated with this Context.
term()	Close or terminate the context.

Attributes

client_publickey
client_secretkey
closed
secure
server_publickey
server_secretkey
underlying	The address of the underlying libzmq context

classmethod instance()

Returns a shared instance with the same shared secret, if there is one, otherwise creates it. If an instance already exists, io_threads will be ignored, otherwise it will be used in the new instance. Takes into account subclasses such that a subclass calling this method will always get back an instance of its own class

socket(*args, **kwargs)

Create a Socket associated with this Context.

Parameters

• socket_type (int) – The socket type, which can be any of the 0MQ socket types: REQ, REP, PUB, SUB, PAIR, DEALER, ROUTER, PULL, PUSH, etc.

• socket_class (zmq.Socket or a subclass) –

  The socket class to instantiate, if different from the default for this Context. e.g. for creating an asyncio socket attached to a default Context or vice versa.

  New in version 25.

• kwargs – will be passed to the __init__ method of the socket class.

sockopts: Dict[int, Any]