Fixed up attaching camera hardware

#!/usr/bin/env python

import time

import atexit

import logging

import sys

import os

from flask import (

    Flask, jsonify, send_file)

from openflexure_microscope import Microscope

from openflexure_microscope.camera.capture import build_captures_from_exif

from openflexure_microscope.config import USER_CONFIG_DIR

from openflexure_microscope.api.v1 import blueprints

# Import device modules

# NB this will eventually be handled by the RC file, so you can choose what device

# class should be attached.

try:

    from openflexure_microscope.camera.pi import StreamingCamera

    from openflexure_microscope.camera.pi import PiCameraStreamer

except ImportError:

    from openflexure_microscope.camera.mock import StreamingCamera

    logging.warning("Unable to import PiCameraStreamer")

from openflexure_microscope.camera.mock import MockStreamer

from openflexure_microscope.stage.sanga import SangaStage

from openflexure_microscope.stage.mock import MockStage

from openflexure_microscope.camera.capture import build_captures_from_exif

from openflexure_microscope.config import USER_CONFIG_DIR

from openflexure_microscope.api.v1 import blueprints

import time

import atexit

import logging

import sys

import os

# Handle logging

is_gunicorn = "gunicorn" in os.environ.get("SERVER_SOFTWARE", "")

    global api_microscope, stored_image_list

    logging.debug("First request made. Populating microscope with hardware...")

    # Initialise camera

    logging.debug("Creating camera object...")

    # TODO: Try except finally, like with stage

    api_camera = StreamingCamera()

    try:

        api_camera = PiCameraStreamer()

    except Exception as e:

        logging.error(e)

        logging.warning("No valid camera hardware found. Falling back to mock camera!")

        api_camera = MockStreamer()

    # Initialise stage

    logging.debug("Creating stage object...")

    # TODO: Tidy this up. api_stage may be referenced before assignment. Use some form of Maybe monad?

    try:

        api_stage = SangaStage()

    except Exception as e:

        logging.error(e)

        logging.warning("No valid stage hardware found. Falling back to mock stage!")

        api_stage = MockStage()

    finally:

    # Attach devices to microscope

    logging.debug("Attaching devices to microscope...")

    api_microscope.attach(

        api_camera,

        api_stage

    )

    # Restore loaded capture array to camera object

    logging.debug("Restoring captures...")

    if stored_image_list:

        api_microscope.camera.images = stored_image_list