There're a few functions lacking in 8.1 from 7.8.5, what are ways to get the same thing

[nminchin]

To check tag quality from script, use this at the bottom of Paul's post:

How to locate the number 'value' of a Tag's Data Quality

You shouldn’t use string comparison or integer comparison. In the vast majority of cases, it’s preferable to use the dedicated methods on QualityCode - isGood(), isBad(), etc directly: system.tag.read("TagPath").quality.isGood() Or, thanks to Jython: system.tag.read("TagPath").quality.good If you actually need to check for a specific quality code, then you should use is against a static member of the QualityCode class: from com.inductiveautomation.ignition.common.model.values import Quality…

While the old tag read function still exists, it's gone from doco an thus you should probably move to the new system.tag.readBlocking or readAsync in 8, which now take lists.

Maybe have a look at some things I found migrating from 7 to 8 as well that aren't obvious from doco:

Undocumented changes when migrating from v7 to v8

Just some items I’ve found during v7 to v8 upgrades that may not be documented (some of them might be) and can cause hiccups (and quite a bit of work, relatively speaking!). The official guide to upgrading from IA is here. Tags: UDT v7 property UDTParentType has been renamed in v8 to TypeId Tag quality string values have changed. E.g. EDITED FOR 8.1.10 below 8.1.10 “Not Found” ==> “Bad_NotFound”; “Disabled” ==> “Bad_Disabled”; 8.1.10 and above “Bad_NotFound(Error description…)”, “Bad_ErrorC…