Ekran SQLite çıkışı bir kart için satır gösterir 0.</p> <p>var bugüne kadar kod eğer 1 ise tk metin aletinin üzerinde görüntülemek ve ekrana kaldırmak benim db bir satır almaya çalışırken

Question

Im . Bir saniyelik zaman taradığımda bir hata alıyorum.

import sqlite3 as db 
import os 
from prettytable import from_db_cursor 
from smartcard.scard import * 
from smartcard.util import toHexString 
from prettytable import from_db_cursor 
from smartcard.CardMonitoring import CardMonitor, CardObserver 
import time 
from Tkinter import Tk, BOTH, INSERT, Text 

def main(tag): 

     q = "SELECT * FROM CARDS WHERE TAG=?" 
     up = "UPDATE CARDS SET FLAG = (CASE WHEN FLAG=0 THEN 1 ELSE 0 END) WHERE TAG=?" 
     id = "SELECT * FROM CARDS WHERE TAG=?" 
     cursor.execute(q, (tag,)) 
     cursor.execute(up, (tag,)) 
     conn.commit() 
     for row in cursor.execute(id, (tag,)): 
     print row [1] + row[2] #debugging to console 
     r1 = str(row[1]) 
     r2 = str(row[2]) 
     msg = str(r1 + r2) 
     text_widget = Text(root, font='times 40 bold', bg='Green') 
     text_widget.pack(fill=BOTH, expand=0) 
     text_widget.tag_configure('tag-center', wrap='word', justify='center') 
     text_widget.insert(INSERT, msg, 'tag-center') 
     root.mainloop() 
class printobserver(CardObserver): 
    def update(self, observable, (addedcards, removedcards)): 
     previousIdString = "" 
     idString = "" 
     for card in addedcards: 
     if addedcards: 
      hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER) 
      assert hresult==SCARD_S_SUCCESS 
      hresult, readers = SCardListReaders(hcontext, []) 
      assert len(readers)>0 
      reader = readers[0] 
      hresult, hcard, dwActiveProtocol = SCardConnect(
      hcontext, 
      reader, 
      SCARD_SHARE_SHARED, 
      SCARD_PROTOCOL_T0 | SCARD_PROTOCOL_T1) 
      hresult, response = SCardTransmit(hcard,dwActiveProtocol,[0xFF,0xCA,0x00,0x00,0x04]) 
      v = toHexString(response, format=0) 
      tag = str(v) 
      main(tag) 
conn = db.connect('cards3.db') 
root = Tk() 
while True: 
cursor = conn.cursor() 
cardmonitor = CardMonitor() 
cardobserver = printobserver() 
cardmonitor.addObserver(cardobserver) 
cardmonitor.deleteObserver(cardobserver) 
time.sleep(2) 

güncelleme altına

SQLite objects created in a thread can be used in that same thread.The object was created in thread id 6740 and this is thread id 6320 
<traceback object at 0x02AAC418> 
<class 'sqlite3.ProgrammingError'> 
Traceback (most recent call last): 
    File "C:\rfid\main2.py", line 66, in <module> 
    cardmonitor.addObserver(cardobserver) 
    File "C:\Python27\lib\site-packages\smartcard\CardMonitoring.py", line 105, in addObserver 
    observer.update(self, (self.rmthread.cards, [])) 
    File "C:\rfid\main2.py", line 56, in update 
    a(tag) 
    File "C:\rfid\main2.py", line 25, in a 
    root.mainloop() 
    File "C:\Python27\lib\lib-tk\Tkinter.py", line 1017, in mainloop 
    self.tk.mainloop(n) 
KeyboardInterrupt 

Ana kodu: i aşağıdaki yanıtları itibaren şu anda yorgun var.

Taşınmış conn.cursor, ancak aynı sınıf içine. Farklı hata i tüm TK şeyler kaldırmak ve ben hiçbir sorunları ile tarama kartlarını tutabilir while True: yukarıda cursor = conn.cursor koyarsanız Coursor is not defined

import sqlite3 as db 
import os 
from prettytable import from_db_cursor 
from smartcard.scard import * 
from smartcard.util import toHexString 
from prettytable import from_db_cursor 
from smartcard.CardMonitoring import CardMonitor, CardObserver 
import time 
from Tkinter import Tk, BOTH, INSERT, Text 

def main(tag): 

     q = "SELECT * FROM CARDS WHERE TAG=?" 
     up = "UPDATE CARDS SET FLAG = (CASE WHEN FLAG=0 THEN 1 ELSE 0 END) WHERE TAG=?" 
     id = "SELECT * FROM CARDS WHERE TAG=?" 
     cursor.execute(q, (tag,)) 
     cursor.execute(up, (tag,)) 
     conn.commit() 
     for row in cursor.execute(id, (tag,)): 
     print row [1] + " has been checked " + ('in' if row[2] else 'out') 
     r1 = str(row[1]) 
     r2 = str(row[2]) 
     mseg = str(r1 + r2) 
     text_widget = Text(root, font='times 40 bold', bg='Green') 
     text_widget.pack(fill=BOTH, expand=0) 
     text_widget.tag_configure('tag-center', wrap='word', justify='center') 
     text_widget.insert(INSERT, r1 + r2, 'tag-center') 
     root.mainloop() 

class printobserver(CardObserver): 
    cursor = conn.cursor() 
    def update(self, observable, (addedcards, removedcards)): 
     previousIdString = "" 
     idString = "" 
     for card in addedcards: 
     if addedcards: 
      hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER) 
      assert hresult==SCARD_S_SUCCESS 
      hresult, readers = SCardListReaders(hcontext, []) 
      assert len(readers)>0 
      reader = readers[0] 
      hresult, hcard, dwActiveProtocol = SCardConnect(
      hcontext, 
      reader, 
      SCARD_SHARE_SHARED, 
      SCARD_PROTOCOL_T0 | SCARD_PROTOCOL_T1) 
      hresult, response = SCardTransmit(hcard,dwActiveProtocol,[0xFF,0xCA,0x00,0x00,0x04]) 
      v = toHexString(response, format=0) 
      tag = str(v) 
      main(tag) 

conn = db.connect('cards3.db') 
root = Tk() 
while True: 

cardmonitor = CardMonitor() 
cardobserver = printobserver() 
cardmonitor.addObserver(cardobserver) 
cardmonitor.deleteObserver(cardobserver) 
time.sleep(2) 

da hata

def main(tag): 
     cursor = conn.cursor 
     q = "SELECT * FROM CARDS WHERE TAG=?" 
     up = "UPDATE CARDS SET FLAG = (CASE WHEN FLAG=0 THEN 1 ELSE 0 END) WHERE TAG=?" 
     id = "SELECT * FROM CARDS WHERE TAG=?" 
     cursor.execute(q, (tag,)) 
     cursor.execute(up, (tag,)) 
     conn.commit() 
     for row in cursor.execute(id, (tag,)): 
     print row [1] + " has been checked " + ('in' if row[2] else 'out') 
     r1 = str(row[1]) 
     r2 = str(row[2]) 
     mseg = str(r1 + r2) 
     text_widget = Text(root, font='times 40 bold', bg='Green') 
     text_widget.pack(fill=BOTH, expand=0) 
     text_widget.tag_configure('tag-center', wrap='word', justify='center') 
     text_widget.insert(INSERT, r1 + r2, 'tag-center') 
     root.mainloop() 

def update(self, observable, (addedcards, removedcards)): 
      previousIdString = "" 
      idString = "" 
      for card in addedcards: 
      if addedcards: 
       hresult, hcontext = SCardEstablishContext(SCARD_SCOPE_USER) 
       assert hresult==SCARD_S_SUCCESS 
       hresult, readers = SCardListReaders(hcontext, []) 
       assert len(readers)>0 
       reader = readers[0] 
       hresult, hcard, dwActiveProtocol = SCardConnect(
       hcontext, 
       reader, 
       SCARD_SHARE_SHARED, 
       SCARD_PROTOCOL_T0 | SCARD_PROTOCOL_T1) 
       hresult, response = SCardTransmit(hcard,dwActiveProtocol,[0xFF,0xCA,0x00,0x00,0x04]) 
       v = toHexString(response, format=0) 
       tag = str(v) 
       main(tag) 
       cursor = conn.cursor 

ana ve güncelleme ama hala aynı koyarak yorgun mı olmak

def main(tag): 
      cursor = conn.cursor 
      q = "SELECT * FROM CARDS WHERE TAG=?" 
      up = "UPDATE CARDS SET FLAG = (CASE WHEN FLAG=0 THEN 1 ELSE 0 END) WHERE TAG=?" 
      id = "SELECT * FROM CARDS WHERE TAG=?" 
      cursor.execute(q, (tag,)) 
      cursor.execute(up, (tag,)) 
      conn.commit() 
      for row in cursor.execute(id, (tag,)): 
      print row [1] + " has been checked " + ('in' if row[2] else 'out') 

Answer 1

SQLite objects created in a thread can be used in that same thread.The object was created in thread id 6740 and this is thread id 6320

class printobserver(CardObserver) yeni bir konu açıyor olması gerekiyor, sqlite3 fazla eşzamanlılığı desteklemiyor. Ancak, farklı süreçler boyunca yapar. kodunuzdan bu snip Uyarı:

printobserver

main(tag) 

ana

q = "SELECT * FROM CARDS WHERE TAG=?" 
     up = "UPDATE CARDS SET FLAG = (CASE WHEN FLAG=0 THEN 1 ELSE 0 END) WHERE TAG=?" 
     id = "SELECT * FROM CARDS WHERE TAG=?" 
     cursor.execute(q, (tag,)) 
     cursor.execute(up, (tag,)) 
     conn.commit() 

genel ad while-loop

cardobserver = printobserver() 
cardmonitor.addObserver(cardobserver) 
cardmonitor.deleteObserver(cardobserver) 

printobserver nesnesinden main()'u aradığınızdan (açıkça bu nesne her seferinde yeni bir iş parçacığı oluşturuyor), global ad alanında ana iş parçacığında cursor ortaya çıktınız ve şimdi main() içinde imleci çağırıyorsunuz. iş parçacığı, bu hatayı alıyorsunuz.

Eğer main() harici olarak cursor kullanmıyorsanız, ben yapmanız gereken onu yapıyorsun, sonra cursor başlatılıyor, main() üstündeki veritabanına bağlanmak ve ana altındaki veritabanından ayırmadan önerilir. Alternatif olarak, printobserver nesnesinde bunu yapabilirsiniz, imleç başlatması hala main() ile aynı iş parçacığı içinde olacaktır.