Being new with python so far, I got inspired by this answer: https://gis.stackexchange.com/a/155988/8202 to dive into it a bit.
When creating features in a new target layer from an existing source layer, all "solutions" I found so far to create that new layer, were to either
- prepare the new target layer manually in QGIS beforehand, adding all fields (with field types, lengths etc).
- Hard-code the field settings into the python script when creating that new target layer. How to create a new empty vector layer programmatically?
It seems a bit odd to me that there should be no programmatic way to clone the attribute scheme of a layer, and create a new (memory) layer with this scheme, so you wont have to change your script for each new layer, or fumble things together manually.
I'm focused on the creation of memory-layers, cause I want to have the opportunity to decide by myself if the outcome is satisfactory and save it manually when it fits my needs.