Automatically loading layers on startup (problem) using PyQGIS

Question

I made a small code to fetch some PostGIS layers into QGIS and apply them with qml style, like the following:

import os
from qgis.core import QgsVectorLayer, QgsDataSourceUri, QgsVectorLayer, QgsProject
uri = QgsDataSourceUri()
uri.setConnection(#CONN_INFO)
city_filter = 'Cairu'
uri.setDataSource("public", "dende_mp", "geom", f"nom_munici = '{city_filter}'")
vlayer = QgsVectorLayer(uri.uri(False), f"car_{city_filter}", "postgres")
QgsProject.instance().addMapLayer(vlayer)
vlayer.loadNamedStyle('C:\\Users\\curyp\\OneDrive\\Desktop\\Projetos\\project_1\\styles\\tam_area_car.qml')
uri.setDataSource("public", "sigef_visita", "geom", f"municip = '{city_filter}'")
vlayer_sigef = QgsVectorLayer(uri.uri(False), f"sigef_{city_filter}", "postgres")
QgsProject.instance().addMapLayer(vlayer_sigef)
vlayer_sigef.loadNamedStyle('C:\\Users\\curyp\\OneDrive\\Desktop\\Projetos\\project_1\\styles\\tam_area_sigef.qml')

It's working fine, but for some reason after I close and reopen QGIS, these same layers get loaded again, with styling and all. It also asks me if I want to save or discard project modifications. I've tried to delete layers, discard editings, calling QgsProject.instance().removeAllMaplayers(), but none of these works.

Any ideas?

• Tom Brennan: You might be dealing with a bug rather than a problem that other users can help with. Consider installing a different version of QGIS, and using a new profile and see if you can replicate the issue. If you can, perhaps raise a bug (qgis.org/en/site/getinvolved/development/bugreporting.html)
• RainForest: Check "startup.py" file in your home folder (something like ..AppData\Roaming\QGIS\QGIS3). Code in this file runs automatically on QGIS start. Check PYQGIS_STARTUP environment variable also.
• Matt: When and where are you executing the code?

Answer 1

After some time away from qgis scripts, this is the solution I found:

Apparently, when you try to add a python script file to QGIS "add scripts to toolbox", it gets coppied to qgis scripts folder and executed on startup.

In windows, go to: C:\Users\User\AppData\Roaming\QGIS\QGIS3\profiles\default\processing\scripts and remove your personal scripts that are wrongly being executed on startup.

Version of QGIS tested: 3.22.14