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COMET

Instrument emulation

Table of contents

Quick start

Run an instrument emulation socket on port 10001 from the command line.

python -m comet.emulator.keithley.k2410 -p 10001

See package comet.emulator for available emulators.

Custom emulators

Create a custom instrument emulator socket by inheriting from class RequestHandler. Use method decorator message to create message routes using regular expressions. Use capture groups () and to extract strings and map to function arguments.

from comet.emulator.emulator import message, run
from comet.emulator.emulator import RequestHandler

class MyHandler(RequestHandler):
    """My custom request handler."""

    @message(r'\*IDN\?')
    def query_idn(self):
        return "MyInstrument, version 1.0"

    @message(r'\*RST')
    def write_reset(self):
        pass

    @message(r':?SYST:BEEP:STAT\s+(0|1|OFF|ON)')
    def write_voltage(self, state):
        state = {'0': False, '1': True, 'OFF': False, 'ON': True}[state]

    @message(r':?SOUR:VOLT:LEV\s+([+-]\d+(?:\.\d+)?(?:)[eE]\d+)?)')
    def write_voltage(self, voltage):
        voltage = float(voltage)

if __name__ == "__main__":
    run(MyHandler)

Running a custom emulator from the command line.

python my_handler.py -p 10001