Will sort a directory of image files into subfolder by resolution

sort.py

#!/usr/bin/env python
# sort.py: sorts images in to subfolders based on resolution

from PIL import Image
from os import path, mkdir
from shutil import move
from glob import glob

class ImageSorter:
    imageFormats = ("jpg", "png")
    directory = ""
    
    def __init__(self, workdir="."):
        self.directory = workdir

    def noCaseGlob(self, pattern):
        def either(c):
            return '[%s%s]'%(c.lower(),c.upper()) if c.isalpha() else c
        return glob(''.join(map(either,pattern)))

    def searchDirectory(self):
        for format in self.imageFormats:
            for image in self.noCaseGlob(self.directory+"/*."+format):
                im = Image.open(image)
                imageSize = str(im.size[0])+"x"+str(im.size[1])
                if self.checkDirectory(imageSize):
                    self.moveImageFile(image, imageSize)
                else:
                    self.createDirectory(imageSize)
                    self.moveImageFile(image, imageSize)

    def checkDirectory(self, size):
        return path.exists(self.directory+"/"+size)

    def createDirectory(self, size):
        print("Creating "+size)
        return mkdir(self.directory+"/"+size)

    def moveImageFile(self, imageFile, size):
        print("Moving '"+imageFile+"' -> '"+size+"'")
        return move(imageFile, self.directory+"/"+size)

sorter = ImageSorter()
sorter.searchDirectory()