Hey everyone, I'm starting meltano and I have a question about stream maps I want to replace a value in a record using

regex

, but it seems hard / impossible to

import re

module and use it with eval statement So what's the best way to achieve this using meltano ? I was wondering if I can easily add new built-in functions (like the

md5

), or make the re module available in the meltano-map-transformer (I guess I should add it to the singer_sdk/mapper.py file 🤔) Thanks in advance Edit: In general, what is the best way to handle custom transformer ? I know of the dbt solution, but I really want to transform my stream using python

We have an issue for that: https://github.com/meltano/sdk/issues/971 Although I'm not sure we'll be prioritizing it soon internally. For custom transformers, you might wanna look at the methods

StreamMapper

defines in the meltano-map-transform repo. It might also make sense to make the eval transformer easier to extend, so do log an issue in the singer sdk repo if you're interested in that.

These existing issues are loosely related also: https://github.com/meltano/sdk/issues/792 https://github.com/meltano/sdk/issues/1231