What's throws an error in this code:

[נתי שטרן‎]

#from orm import Database

import urllib3

#db = Database('db1.sqlite')  # indicating a database file.

from os import listdir

from os.path import isfile, join

from pony.orm import *

db = Database()

class Line(db.Entity):

     text = Required(str)

     number = Required(int)

     results = Set('Result')

  

class Result(db.Entity):

     filePath = Required(str)

     line = Required(Line)

     searches=Set('Search')

class Search(db.Entity):

     myID = Required(str)

     query = Required(str)

     results = Set('Result')

   

db.bind(provider='sqlite', filename='mydb.sqlite', create_db=True)

db.generate_mapping(create_tables=True)

from bottle import route, run, template

import glob

onlyfiles=glob.glob("C:\*.txt")

q11=glob.glob("C:\*.cobol")

def q(query):

    quer2y=query

    import time

#onlyfiles = [f for f in listdir(mypath) if isfile(join(mypath, f))]

    for a in q11:

        openfile=open(a)

        ln=0

        addr=a

        TIMER=time.ctime()

        for line in openfile:

            ln=ln+1

            quo=''

            quer2y=urllib3.parse.quote(quer2y)

                if quer2y in line:

                    with db_session:

                        l=Line(text=line,number=ln)

                        r=Result(filePath=addr,line=l)

                        s=Search(myID=TIMER,query=quer2y,results=r)

                        commit()

    a=""

    with db_session:                    

        query11 = select(c for c in Search if c.query==quer2y and c.myID==TIMER)

        for s in query11:

            a=a+"at: "+s.myID+"<br>"+str(s.results.filePath)+"<br>"+str(s.results.line.number)+"<br>"+str(s.results.line.text)

    return a

@route('/')

def a():

    return '<script>var x=prompt("query");window.location.replace("search/"+x);</script>'

@route('/search/<query>')

def index(query):

    return template('<b>{{query}}</b>'+q(query), query=query)

run(host='0.0.0.0', port=81)