How can I count point shp inside a polygon shp using Python?

This is my first time here, so I'll try to be as specific as I can.

What I'm trying to do is found out which polygon contains the most points and write the result in a text file.

Here is my script : (tab25Select are the polygons and chefLyr are the points)

chefLyr = arcpy.MakeFeatureLayer_management(cheflieuIN, "chefLyr")

with arcpy.da.SearchCursor(tab25Select, ["Numero", "Name"]) as rows:
    for row in rows:
        chefTab25Max = 0
        chefTab25 = arcpy.GetCount_management(arcpy.SelectLayerByLocation_management(chefLyr, "WITHIN", tab25Select))
        arcpy.AddMessage(cheflTab25)
        for chf in cheflTab25:
            if chf > chefTab25Max:
                chefTab25Max = cheflTab25
                a = row[0]
                b = row[1]

ficTxt.write("\r\n The polygon containing the most point is :{0}".format(chefTab25Max))



ficTxt.close()

If anyone can help :)