# DotReferenceJythonMap is missing pop() method **URL:** \ **Category:** Ignition\ **Tags:** ignition81, perspective\ **Created:** [November 21, 2023, 9:30am UTC](https://forum.inductiveautomation.com/t/dotreferencejythonmap-is-missing-pop-method/82178 "2023-11-21T09:30:30Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\ **Post date:** [November 21, 2023, 12:55pm UTC](https://forum.inductiveautomation.com/t/dotreferencejythonmap-is-missing-pop-method/82178/2 "2023-11-21T12:55:57Z")
> [@Frosty](#): > > better way Yes. Don't chain transforms. A script transform has substantial overhead, so only **one** should ever be attached to a binding. Instead, delegate to one or more project library scripts. (Nest the calls, so result from one is the `value` arg to the next. Do **not** use `def` or `import` inside a transform.) > [@Frosty](#): > > stop this conversion Nope. This is all discussed in some detail, with non-scripting alternatives, in my Integration Toolkit module topic (and its docs): > [@Automation Professionals' Integration Toolkit Module](https://forum.inductiveautomation.com/t/automation-professionals-integration-toolkit-module/74934): > > Automation Professionals is pleased to announce the immediately availability of a major upgrade to its free Simulation Aids Integration Toolkit module. The new feature justifying the "major upgrade" language is the implementation of eleven new expression functions which use iteration to accomplish complex transforms of datasets and lists, to or from other datasets and lists, applying filtering, ordering, and computed new columns along the way. While there are certain operations that are still … --- _[View the full topic](https://forum.inductiveautomation.com/t/dotreferencejythonmap-is-missing-pop-method/82178)._