Roman Mindlin

class HBox4(QGridLayout):
    def __init__(self, parent=None):
        super(HBox4, self).__init__(parent)
        self.table = TableWidget()
        self.addWidget(self.table, *(0,0))
        self.addWidget(TabDemo(), *(0,1))
    def update(self,data):
        self.table.update(data)

class TableWidget(QTableWidget):
    def __init__(self, parent=None, data=[]):
        super(TableWidget, self).__init__(parent)
        #data = []
        self.setColumnCount(1)
        self.setRowCount(len(data))
        for i, entry in enumerate(data, start=1):
            self.setRowCount(i)
            item = QTableWidgetItem()
            item.setText(str(entry))
   def update(self,data):
        self.clearContents ()
        #тут очищаем таблицу, затем тот же код, что и в init
        self.setColumnCount(1)
        self.setRowCount(len(data))
        for i, entry in enumerate(data, start=1):
            self.setRowCount(i)
            item = QTableWidgetItem()
            item.setText(str(entry))

try:
    cursor.execute("SELECT * FROM index WHERE complete = FALSE")
except Exception as e:
    print(e)
    return None

import requests
session = requests.Session()

rows = cursor.fetchall()
for row in rows:
    print("open %s"%row[1])
    try:
        req = session.get(row[1])
#скачал что надо, обработал
    except AttributeError as e:
        print(e)
        return None

try:
    cursor.execute("INSERT INTO pages (fields) VALUES (%s)", ("что там напарсил",))
except Exception as e:
    print(e)
    return None

try:
    cursor.execute("UPDATE index SET complete = TRUE WHERE id = %s",(row[0],))
except Exception as e:
    print(e)
    return None