python - 将 QTableWidget 写入 .csv 或 .xls

Question

是否可以将 QTableWidget 的内容写入 csv？我发现了一个关于使用 xlwt 写入 .xls 的问题，但似乎无法使用我的代码让它工作。

def saveFile(self):
    filename = unicode(QtGui.QFileDialog.getSaveFileName(self, 'Save File', '', ".xls(*.xls)"))    
    wbk = xlwt.Workbook()
    self.sheet = wbk.add_sheet("sheet")
    self.write()
    wbk.save(filename)    


def write(self):
    for col in range (self.coordinates.columnCount()):
        for row in range(self.coordinates.rowCount()):
            text=str(self.coordinates.item(row,col).text())
            self.sheet.write(row,col,text)

我收到以下错误:

  File "C:\Users\Tory\Desktop\DIDSON.py", line 186, in saveFile
    self.write()
  File "C:\Users\Tory\Desktop\DIDSON.py", line 192, in write
    text=str(self.coordinates.item(row,col).text())
AttributeError: 'NoneType' object has no attribute 'text'

这是为什么？ self.coordinates 是一个 QTableWidget。我能够让项目本身成功保存到工作表中，尽管我仍然想保存为 .csv...

Answer 1

回答有关 AttributeError 的问题:这可能是因为表中有一些空行或空列。

空单元格没有分配给它的 QTableWidgetItem，所以 table.item() 将返回 None(显然没有 'text' 属性)。

要将表格保存为 csv，请尝试下面的示例(它也可以打开 csv 文件，并有望处理任何潜在的 unicode 问题):

import sys, csv
from PyQt4 import QtGui, QtCore

class Window(QtGui.QWidget):
    def __init__(self, rows, columns):
        QtGui.QWidget.__init__(self)
        self.table = QtGui.QTableWidget(rows, columns, self)
        for column in range(columns - 1):
            for row in range(rows - 1):
                item = QtGui.QTableWidgetItem('Text%d' % row)
                self.table.setItem(row, column, item)
        self.buttonOpen = QtGui.QPushButton('Open', self)
        self.buttonSave = QtGui.QPushButton('Save', self)
        self.buttonOpen.clicked.connect(self.handleOpen)
        self.buttonSave.clicked.connect(self.handleSave)
        layout = QtGui.QVBoxLayout(self)
        layout.addWidget(self.table)
        layout.addWidget(self.buttonOpen)
        layout.addWidget(self.buttonSave)

    def handleSave(self):
        path = QtGui.QFileDialog.getSaveFileName(
                self, 'Save File', '', 'CSV(*.csv)')
        if not path.isEmpty():
            with open(unicode(path), 'wb') as stream:
                writer = csv.writer(stream)
                for row in range(self.table.rowCount()):
                    rowdata = []
                    for column in range(self.table.columnCount()):
                        item = self.table.item(row, column)
                        if item is not None:
                            rowdata.append(
                                unicode(item.text()).encode('utf8'))
                        else:
                            rowdata.append('')
                    writer.writerow(rowdata)

    def handleOpen(self):
        path = QtGui.QFileDialog.getOpenFileName(
                self, 'Open File', '', 'CSV(*.csv)')
        if not path.isEmpty():
            with open(unicode(path), 'rb') as stream:
                self.table.setRowCount(0)
                self.table.setColumnCount(0)
                for rowdata in csv.reader(stream):
                    row = self.table.rowCount()
                    self.table.insertRow(row)
                    self.table.setColumnCount(len(rowdata))
                    for column, data in enumerate(rowdata):
                        item = QtGui.QTableWidgetItem(data.decode('utf8'))
                        self.table.setItem(row, column, item)

if __name__ == '__main__':

    app = QtGui.QApplication(sys.argv)
    window = Window(10, 5)
    window.resize(640, 480)
    window.show()
    sys.exit(app.exec_())