Creating user input parameter inside selectbyattribute query in ArcPy

Question

I'm new to ArcPy and Python in general. I'm experimenting with Python within ArcGIS Pro, but I've encountered an issue, here is the code:

import arcpy
arcpy.env.workspace = "C:/Users/Nastgardaren/Desktop/Strangnas/Strangnas/Strangnas.gdb"
input_inkomst = arcpy.GetParameterAsText(0)
input_fastigheter = arcpy.GetParameterAsText(1)
inkomstklass = arcpy.GetParameterAsText(2)
klasstyp = arcpy.GetParameterAsText(3)
val_av_klass = arcpy.management.SelectLayerByAttribute(input_inkomst,'NEW_SELECTION',"'{}'='{}'".format(inkomstklass,klasstyp))
produkt = arcpy.management.SelectLayerByLocation(input_fastigheter, 'WITHIN', val_av_klass)
arcpy.CopyFeatures_management(produkt,'produkt2')

the idea with the project is to create a new layer, which represents polygons (a subset of the layer in input_fastigheter) within the containment of another vector layer (input_inkomst) based on values between 1-8 from a field in the input_inkomst layer (the layer is predetermined for the first parameter, but I made it a user defined parameter, just for the sake of the experiment). When I remove the fourth input parameter and assign a defined value between 1 and 8, then the script works fine, but when I run the script like I pasted here, then I get a empty layer as a result.

I have found a very similar question on this site: Get Parameter as Text and select layer by attribute

Although I tried to solve it the same way as the OP did, I wasn't succesful because the name of the field in the attribute table wasn't properly defined apparently according to the error i received. This lead me to create a fourth parameter in which the user writes the name of the field, but I'm still stuck on the issue of having an empty output.

• FelixIP: Print query, copy it and apply through gui to check if it's correct. If not, convert parameter to integer.
• Nastgardaren: Do you mean that I should convert the "getparameterastext" parameters to integer inside of python, or should I change the parameter data type in arcgis to integer from string?
• FelixIP: Inside, because it will read it as text, no matter parameter type. Still compute query before select and add arcpy.AddMessage(query)
• Nastgardaren: Alright, when I tried to compute the code in pycharm directly, it said that the syntax is invalid, this was the case also in python within arcgis. I assume that I'm missing something about this, but the main issue is that the conversion from string to integer did not yield any results. I looked up how I should do and did it like this: klasstyp_str = int(arcpy.GetParameterAsText(3) klasstyp = int(klasstyp_str)
• Nastgardaren: and still, the result is an empty feature class. I realise why it didn't work before, the "get parameter as text" converts all input to string by default, but I don't understand why it didn't work this time if I converted the input to integer.