如何使用pyqt4清除带有索引的表小部件中的数据

Question

这是我的程序，我想清除数据，我看到了remove row方法，但它正在删除索引行。如何在不在table小部件中分配新项的情况下清除数据

下面是我的代码：

import sys
from functools import partial
from PyQt4 import QtGui, QtCore


class Example(QtGui.QWidget):
    def __init__(self):
        super(Example, self).__init__()
        self.initUI()

    def initUI(self):
        self. table = QtGui.QTableWidget(3, 6, self)
        self.table.setGeometry(10, 70, 500,300)
        self.table.verticalHeader().hide()
        self.table.setEditTriggers(QtGui.QAbstractItemView.NoEditTriggers)
        fnt = self.table.font()
        fnt.setPointSize(11)
        self.table.setFont(fnt)
        self.table.setHorizontalHeaderLabels(("S.no, Item Description,Qty,Rate(Rs:),Subtotal,"",").split(','))

        all_data = [("1", "Acne-aid Wash Facial Cleansing", 191.72, 0),
                    ("2", "AMoisturizer", 90, 0),
                    ("3", "Brightening eye cream", 40, 0)]

        for r, row_data in enumerate(all_data):
            for c, value in zip((0, 1, 3, 4), row_data):
                it = QtGui.QTableWidgetItem(str(value))
                self.table.setItem(r, c, it)

            btn = QtGui.QPushButton(icon=QtGui.QIcon("trash1.png"))
            btn.clicked.connect(partial(self.cleardata,r))
            self.table.setCellWidget(r, 5, btn)
        self.setGeometry(200, 300, 600, 300)
        self.show()

    def cleardata(self,r):
        print r
def main():
    app = QtGui.QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

Answer 1

您只需迭代该行，获取QTableWidgetItem并设置一个空文本：

def cleardata(self, r):
    for c in range(self.table.columnCount()):
        it = self.table.item(r, c)
        if it is not None:
            it.setText("")
        w = self.table.cellWidget(r, c)
        if isinstance(w, QtGui.QLabel):
            w.clear()