Device persistence enhancements

[sequoiap]

As per our discussion, @mcgeorge102938 , here's the sample file we whipped up (storing here so I don't have to keep track of it on my computer)

# autogator's __init__'
__CONFIG_DIR__ = appdirs.path


# registry.py
from autogator import __CONFIG_DIR__
if __CONFIG_DIR__ / "register.yaml" exists:
    load(item in config_dir)

class Registry:
    def __init__(self):
        self.register = {}

    def register(self, name, device):
        self.register[name] = device

    def get(self, name):
        return device

    def save(self):
        # writes configuration/registry to the yaml config file
        pass

class LocalDevice:
    pass

class PyrolabDevice:
    pass

registry = Registry()


# In scripts, we could then do something like this:
from autogator.registry import registry
registry.register("laser", LocalDevice("lasers.tsl550"))
registry.register("motion_x", PyrolabDevice("motion.kcubes.bpc303"))
registry.register("motion_y", LocalDevice(34878427))

motionstage = registry.get('motion_y')
motionstage.jog(0.1)



# experiment.py
class Experiment:
    def __init__(self):
        self.instruments = registry.get_instruments()

    def run(self):
        raise NotImplementedError


class MyExperiment(Experiment):
    def run():
        laser = self.instruments['laser']
        laser.sweep()
        scope.acquire()


# Future testrunner for batched tests
from autogator import testrunner

testrunner.add_test(MyExperiment)
testrunner.run_all()

"""
Review
------

* Naming conventions
* Logical modules
* tests folder
* examples folder
* Clean up parser
* Installation directory, pyyaml config files, persisting devices

1. refactor
2. example
3. test framework
4. added features (persistence, registry, testrunner)
"""