camera.py

import picamera
import io
import time

class camera:
    def __init__(self, camera_opts):
        self.camera_opts = camera_opts

    def get_frame(self):
        stream = io.BytesIO()
        with picamera.PiCamera() as camera:
            camera.start_preview()
            camera.vflip = self.camera_opts["vertical_flip"]
            camera.hflip = self.camera_opts["horizontal_flip"]
            camera.meter_mode = self.camera_opts["meter_mode"]
            camera.exposure_mode = "auto"
            camera.resolution = (self.camera_opts["width"], self.camera_opts["height"])
            # Camera warm-up time
            time.sleep(self.camera_opts["preview_seconds"])
            camera.capture(stream, format=self.camera_opts["encoding"], quality=self.camera_opts["image_quality"])

        return stream