def set_components(top): spec = Spec.get_spec('Iso8583 v0 - Test') top.title = top.title + ' - ' + spec.name spec_tree = ttk.Treeview(top, columns=('Field', 'Field Encoding', 'Field Value'), selectmode='browse') msg = spec.get_msg_by_name('Authorization Message - 0100') for field_def in msg.req_fields: print field_def.name spec_tree.insert('', 'end', field_def.name, text=field_def.name, values=field_def.name + ',' + field_def.encoding) spec_tree.pack()