For Luxocator's front end, let's create a file called Luxocator.py. This module depends on OpenCV, wxPython, and some of Python's standard OS and threading functionality. It also depends on all the other modules that we have written in this chapter. Add the following shebang line and import statements at the top of the file:
#!/usr/bin/env python
import numpy # Hint to PyInstaller
import cv2
import os
import threading
import wx
from HistogramClassifier import HistogramClassifier
from ImageSearchSession import ImageSearchSession
import PyInstallerUtils
import ResizeUtils
import WxUtils
Now, let's implement the Luxocator class as a subclass of wx.Frame, which represents a GUI frame such as the contents of a window. Most of our GUI code is in the Luxocator class's __init__ method, which is, therefore, a big method but not very complicated...
