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我試圖在QMainWindow中添加文件 - 保存對話框，但這需要從QWidget調用self.tablet [0]。 的代碼如下： 來自QWidget（PyQt4）的QMainWindow調用方法/屬性
from PyQt4.QtGui import *
from PyQt4.QtCore import *
import csv
header1 = ['N', 'Type', 'V', 'Pg', 'Pn', 'Qn']
header2 = ['Nn', 'Nn', 'R', 'X']
class MyTable(QTableWidget):
def __init__(self, header, *args):
QTableWidget.__init__(self, *args)
self.header = header
self.setHorizontalHeaderLabels(header)
self.setColumnWidth(0, 39)
self.setColumnWidth(1, 40)
self.resizeRowsToContents()
self.setVerticalScrollBarPolicy(Qt.ScrollBarAlwaysOn)
self.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOn)
class MyMainWindow(QMainWindow):
def __init__(self, parent=None):
super(MyMainWindow, self).__init__(parent)
self.form_widget = MainWidget(self)
_widget = QWidget()
_layout = QVBoxLayout(_widget)
_layout.addWidget(self.form_widget)
self.setCentralWidget(_widget)
#menu
menubar = self.menuBar()
file = menubar.addMenu('&File')
exit = QAction('Exit', self)
exit.setShortcut('Ctrl+Q')
self.connect(exit, SIGNAL('triggered()'), SLOT('close()'))
save = QAction('Save', self)
save.setShortcut('Ctrl+S')
self.connect(save, SIGNAL('triggered()'), self.Save)
file.addAction(save)
file.addAction(exit)
def Save(self):
self.rowdata = []
path = QFileDialog.getSaveFileName(self, 'Save File', '', 'CSV(*.csv)')
if path:
with open(path, 'w', newline='') as stream:
writer = csv.writer(stream, delimiter=';')
for row in range(MainWidget().table[0].rowCount()):
for column in range(self.table[0].columnCount()):
item = self.table[0].item(row, column)
if item is not None and item.text() != '':
self.rowdata.append(float(item.text()))
else:
self.rowdata.append(0)
writer.writerow(self.rowdata)
self.rowdata = []
class MainWidget(QWidget):
def __init__(self, parent):
QWidget.__init__(self)
self.setGeometry(250, 150, 400, 300)
self.setWindowTitle("New")
self.tab_widget = QTabWidget()
self.tab1 = QWidget()
self.tab2 = QWidget()
self.tab_widget.addTab(self.tab1, "Uzli")
self.tab_widget.addTab(self.tab2, "Vetvi")
#Uzli on tab1
self.table = {}
self.table[0] = MyTable(header1, 1, 6, self.tab1)
self.table[0].resize(525, 430)
self.table[0].show()
#Vetvi on tab2
self.table[1] = MyTable(header2, 1, 4, self.tab2)
self.table[1].resize(525, 430)
self.table[1].show()
#layers
self.vbox = QVBoxLayout()
self.vbox.addWidget(self.tab_widget)
self.setLayout(self.vbox)
self.tab1_layout = QGridLayout()
self.tab1.setLayout(self.tab1_layout)
self.tab1_layout.addWidget(self.table[0], 1, 0, 5, 1)
self.tab2_layout = QGridLayout()
self.tab2.setLayout(self.tab2_layout)
self.tab2_layout.addWidget(self.table[1], 1, 0, 5, 1)
if __name__ == "__main__":
import sys
app = QApplication(sys.argv)
widget = MyMainWindow()
widget.resize(640, 480)
widget.show()
sys.exit(app.exec_())
當我嘗試使用「文件 - 保存」對話框中，這個應用程序：
for row in range(MainWidget().table[0].rowCount()):
TypeError: __init__() missing 1 required positional argument: 'parent'
請幫我找到了一個錯誤。