Adding a feature class to the current ArcGIS Pro map with ArcPy

Question

I wrote some simple code that created multiple polygons using the Buffer tool.
I will use it in a toolbox and therefore want the outFeatureClass to be automatically added to the current map.
The following code doesn't work. "outcome" is the outFeatureClass I want to add.
pw = r"C:UsersMainGISDataArcGISProjectArcGISProject.gdboutcome"
aprx = arcpy.mp.ArcGISProject("CURRENT")
aprxMap = aprx.listMaps("Map")[0]
aprxMap.addLayer(pw)

Running the code in the ArcGIS Pro Python command line I receive an error:
 "ValueError: r"C:UsersMainGISDataArcGISProjectArcGISProject.gdboutcome"

The env.workspace for the Python file is set to r"C:UsersMainGISDataArcGISProjectArcGISProject.gdb".

Hornbydd · Answer

If you read the help file on the addLayer() method for a map it takes a "Layer or LayerFile object". You have passed in pw which is a string which happens to represent a path to a Feature Class, so not a Layer Object. ArcPro wants you to access a dataset via a layer file but as you are directly accessing the FeatureClass I assume a lyrx file does not exist.
You create a Layer object using the MakeFeatureLayer tool.
So this is what you can do in ArcPro 2.6:
with arcpy.EnvManager(addOutputsToMap=True):
  pw = r"C:UsersMainGISDataArcGISProjectArcGISProject.gdboutcome"
  arcpy.MakeFeatureLayer_management(pw,"Outcome")

Adding a feature class to the current ArcGIS Pro map with ArcPy

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