trays.py

import gi
gi.require_version('Gtk', '3.0')
from gi.repository import Gtk
import sys

win = Gtk.Window()
win.connect("destroy", Gtk.main_quit)

store = Gtk.ListStore(int, str, bool)
with open(sys.argv[1]) as f:
    lastaddr = 0
    for l in f.readlines():
        if l == '\n':
            continue
        addr = 0
        isaddr = False
        parts = l[0:-1].split(':')
        try:
            addr = int(parts[0],16)
            insn = parts[1].strip()
            isaddr = True
        except ValueError:
            continue
        if isaddr:
            if addr < lastaddr:
                break
            lastaddr = addr
            print('{:08x} {}'.format(addr, insn))
        treeiter = store.append([addr, insn, True])

tree = Gtk.TreeView(store)
renderer = Gtk.CellRendererText()
column = Gtk.TreeViewColumn("Title", renderer, text=0)
tree.append_column(column)
column = Gtk.TreeViewColumn("Title", renderer, text=1)
tree.append_column(column)
win.add(tree)
win.show_all()
Gtk.main()