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我在PYQT5上开发了一个集成了posgtresql的桌面应用程序。我绊倒了,该表不显示值的情况:qtablewidget中的空值
源代码:
def createTable(self):
self.tableWidget = QTableWidget()
conn = psycopg2.connect('host=localhost port=5432 dbname=postgres user=postgres password=12345678')
cursor = conn.cursor()
query = cursor.execute("SELECT * FROM wave_params")
result = cursor.fetchall()
for i in result:
print(i)
rows = len(result)
columns = len(result[0])
self.tableWidget.setColumnCount(columns)
self.tableWidget.setRowCount(rows)
index = 0
while query != None:
self.tableWidget.setItem(index,0, QTableWidgetItem(query.result[0]))
# self.tableWidget.setItem(index, 1, QTableWidgetItem(str(query.value(1))))
# self.tableWidget.setItem(index, 2, QTableWidgetItem(str(query.value(2))))
index = index + 1
# table selection change
self.tableWidget.doubleClicked.connect(self.on_click)
@pyqtSlot()
def on_click(self):
print("\n")
for currentQTableWidgetItem in self.tableWidget.selectedItems():
print(currentQTableWidgetItem.row(), currentQTableWidgetItem.column(), currentQTableWidgetItem.text())
我无法理解。问题是什么? 谢谢!
[QTableWidgetItem(https://doc.qt.io/qt-5/qtablewidgetitem.html#public-functions)。 – ekhumoro