[Python] How to maintain synchronization between distributed python processes?

I have a number of workstations that run long processes containing sequences like this:

x = wait_while_current_is_set
y = read_voltage
z = z + y


The workstations must maintain synchronization with a central unit that runs processes like this:

x = set_current
y = wait_while_voltage_is_read
z = z + y


It's actually implemented like this on both client and server:

x = set_current
y = read_current
z = z + y


--with "set_current" and "read_current" implemented as library functions from the client and server libraries.

How do I synchronize parallel distributed asynchronous processes in python?

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