Making a Python Toolbox - Need Help

EvanMyers1

I have been trying to get a python toolbox working but no matter what I do, it always comes back with the red exclamation point "Click to repair project item".

I have several functions in the .pyt code, and at the bottom I have the typical "if __name__ == '__main__':" at the bottom.  Is this wrong?  My script is several hundred lines long so here is a shorted version:

import arcpy
import sys
import os

class Toolbox(object):
    def __init__(self):
        """Define the toolbox (the name of the toolbox is the name of the
        .pyt file)."""
        self.label = "Toolbox"
        self.alias = "toolbox"

        # List of tool classes associated with this toolbox
        self.tools = [Tool]


class Tool(object):
    def __init__(self):
        """Define the tool (tool name is the name of the class)."""
        self.label = "Tool"
        self.description = ""
        self.canRunInBackground = False


    def setup(sqlQuery):
        print("ice cream")
    def numberLS(lsOIDList, lsNoWW_NUM):
        print("banana")
    def numberManholes(mhOIDList, mhNoMH_NUM):
        print("chocolate syrup")
    def numberGravityMains(mhOIDList, grvmainOIDList, grvmainNoID)
        print("peanuts")

    if __name__ == '__main__':

        # Global Environment settings
        arcpy.env.overwriteOutput = True

        aprx = arcpy.mp.ArcGISProject('current')
        currentMap = aprx.activeMap
        lyrList = currentMap.listLayers()

        sqlQuery = "OWNEDBY = 1 AND LIFECYCLESTATUS = 'ACTIVE'"
        setup(sqlQuery)
        numberLS(lsOIDList, lsNoWW_NUM)
        numberManholes(mhOIDList, mhNoMH_NUM)

EvanMyers1

Thanks for the help everyone.  I have decided to switch gears and use a stand alone script and import it.