oswalktest.py

srcDir = DirectoryChooser("Choose!").getDirectory()
IJ.log("directory: "+srcDir)
for root, directories, filenames in os.walk(srcDir):
    for filename in filenames:
        if filename.endswith(".tif"):
            path = os.path.join(root, filename)
            IJ.log(path)
            imp = IJ.openImage(path)
            imp.show()
            imp.close()