Python 3x query data using dates from datepicker dialog - python-3.x

Question

One last attempt to solve this problem. I have a Python program that queries the database using a default rundate to today - timedelta(7). I have created a datepicker to be opened using a menu button if the user want to choose their own dates to query. I am having problems figuring out the query that will integrate the dates chosen by the datepicker into the program.
The datepicker works fine as I am able to print the start and end dates that are chosen using
def submit():
start = self.result1.strftime("%m/%d/%Y")
end = self.result2.strftime("%m/%d/%Y")
print(start, end)
I assume that the "print(start, end)" will have to be changed to "return(start,end)" to incorporate it into the main query but I could be wrong.
The initial query and top part of the interface is
import pyodbc
from datetime import date, timedelta
from tkinter import *
from tkinter.ttk import *
import calendar
from decimal import *
import sqlite3
import os
import pick
db = r"M:\CWA_DB\WPTS\WPTS_Prod\WPTS_PROD_be.accdb"
conn = pyodbc.connect('Driver={Microsoft Access Driver (*.mdb, *.accdb)};Dbq='+db)
cur = conn.cursor()
#Rundate, 7 days ago
rundate = date.today() - timedelta(7)
print(rundate)
#Query permits made effective since rundate
query = '''select `NPDES_ID`, `EffectiveDate`, `FacilityName`, `StateFacilityID`, `City`, `CountyName`
from Permits
where `EffectiveDate` >= ?
order by `NPDES_ID`'''
IDS=[]
FacCodes=[]
PermStrings=[]
PayStrings=[]
OwnerStrings=[]
MTB=[]
MTG=[]
MTR=[]
SWC=[]
MT0=[]
count=0
#for each row in result of query
for row in cur.execute(query, (rundate)):
try:
d= row[1].strftime('%m/%d/%Y')
except:
d=""
#create a display string with the appropriate information permit # - date - facility name - city, county
for i in range(len(row)):
if not row[i]:
row[i] = ""
permitstring=row[0]+" | "+d+"\t | "+row[2]+"\t | "+row[4]+", "+row[5]+" County"
IDS.append(row[0])
tempid=row[0]
#add the index to the appropriate permit type array, used to display seperately
if tempid[0:3]=="MTB":
MTB.append(count)
if tempid[0:3]=="MTG":
MTG.append(count)
if tempid[0:4]=="MTR0":
MTR.append(count)
if tempid[0:3]=="MT0" or tempid[0:3]=="MT4" or tempid[0:3]=="MTX":
MT0.append(count)
if tempid[0:4]=="MTR1":
SWC.append(count)
FacCodes.append(row[3])
PermStrings.append(permitstring)
count+=1
WPTSInv=[]
#get the owners for the permits
for i in range(len(IDS)):
query = '''select `Owner`
from Owners
where `StateFacilityID` = ?'''
for row in cur.execute(query, (str(FacCodes[i]))):
#create an owner name string for the facility ID
OwnerStrings.append("Owner: "+row[0])
#get payments on the permits
for i in range(len(IDS)):
paydate = date.today() - timedelta(60)
query = '''select `AmountPaid_credit`, `PayComment`, `DateReceived`, `WPTSinvoiceNo`
from Payments
where `NPDES_ID` = ? and `DateReceived` >= ?'''
PayStrings.append("\tPayment Received")
for row in cur.execute(query, (IDS[i],paydate)):
WPTSInv.append(row[3])
d= row[2].strftime('%m/%d/%Y')
#create a payment string
PayStrings[i]="\t$"+str(round(Decimal(row[0]),2))+" | "+d+" | "+row[1]
#Initiate interface
root = Tk()
master = Frame(root, name='master')
master.pack(fill=BOTH)
root.geometry("800x800+300+100")
root.title('WeeklyReport')
menu_bar = Menu(root)
def exit():
root.destroy()
def GetCalendar():
os.system("Pick.py")
root.wait_window
filemenu = Menu(menu_bar, tearoff=0)
menu_bar.add_cascade(label="File", menu=filemenu)
filemenu.add_command(label="Exit", command=exit)
datemenu = Menu(menu_bar)
menu_bar.add_command(label='Change Date', command=GetCalendar)
root.config(menu=menu_bar)
# start the app
if __name__ == "__main__":
master.mainloop()
I have searched high and low for a solution but have not had much luck. I am sure others would be helped by an answer (even if the answer is that what I am trying to do is impossible)