来自另一类PYQT4的访问方法

Question

我从我的主窗口中创建了2个新的小部件/窗口。现在，我想在MainWindow类中访问我的方法来进入我的新小部件。我怎样才能做到这一点？

这是我的代码：

from UI_NewProject import Ui_widget
from UI_OpenNew import Ui_Form
# Main Class
class MainClass(QtGui.QMainWindow, UI_Main.Ui_MainWindow):
def __init__(self, parent=None):
    super(MainClass, self).__init__(parent)
    self.setupUi(self)
    self.openFile.triggered.connect(self.on_pushButton_clicked)
def on_pushButton_clicked(self):
    connectClass = openNew(self)
    connectClass.show()
def funcfromMain(self):
    filters = ('Data Files (*.csv *.txt *.xls *.xml *.xlsx *.xlsm)',)
    path, filter = QtGui.QFileDialog.getOpenFileNameAndFilter(
        self, 'Open File', '', ';;'.join(filters))
    self.nameFile = os.path.basename(path)
    if (".csv" or ".txt") in path:
        with open(path, 'rb') as drate:
            self.Datas = pd.read_csv(drate, index_col=0)

    if (".xls" or ".xml" or ".xlsx" or ".xlsm") in path:
        with open(path, 'rb') as drate:
            self.Datas = pd.read_excel(drate, index_col=0)

#New Widget/Window class 1
class openNew(QtGui.QMainWindow, Ui_Form):
    #from UI_OpenNew import Ui_Form
    def __init__(self, parent = None):
        super(openNew, self).__init__(parent)
        self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
        self.setupUi(self)
        # Create New Project
        self.pushButton_2.clicked.connect(self.on_Button_clicked)
        self.pushButton.clicked.connect(MainClass.funcfromMain) #this is funtion in MainClass and I want to access it Here
    def on_Button_clicked(self):
        Win = NewProject(self)
        Win.show()
#New Widget/Window class 2
class NewProject(QtGui.QMainWindow, Ui_widget):
    #from UI_NewProject import Ui_widget
    def __init__(self, parent = None):
        super(NewProject, self).__init__(parent)
        self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
        self.setupUi(self)

self.pushButton_2 and self.pushButton来自相应的UI文件。

现在，我想将新UI文件中的按钮连接到MainClass中的方法，因此有关如何实现此目的的任何想法？

错误：（使用parent.func）

TypeError: QFileDialog.getOpenFileNameAndFilter(QWidget parent=None, str caption='', str directory='', str filter='', str initialFilter='', QFileDialog.Options options=0) -> (str, str): argument 1 has unexpected type 'bool'

更新1：我尝试使用mixin类，但是我的主文件很大，我想要在新小部件中像6-7个主要方法一样，所以我对如何处理的任何想法？

Answer 1

在主流中您必须建立连接： connectClass.pushButton.clicked.connect(self.funcfromMain)

from PyQt4 import QtGui

from UI_NewProject import Ui_widget
from UI_OpenNew import Ui_Form
# New Widget/Window class 2
class NewProject(QtGui.QMainWindow, Ui_widget):
    # from UI_NewProject import Ui_widget
    def __init__(self, parent=None):
        super(NewProject, self).__init__(parent)
        self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
        self.setupUi(self)

# New Widget/Window class 1
class openNew(QtGui.QMainWindow, Ui_Form):
    # from UI_OpenNew import Ui_Form
    def __init__(self, parent=None):
        super(openNew, self).__init__(parent)
        self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
        self.setupUi(self)
        # Create New Project
        self.pushButton_2.clicked.connect(self.on_Button_clicked)
    def on_Button_clicked(self):
        Win = NewProject(self)
        Win.show()

# Main Class
class MainClass(QtGui.QMainWindow, UI_Main.Ui_MainWindow):
    def __init__(self, parent=None):
        super(MainClass, self).__init__(parent)
        self.setupUi(self)
        self.openFile.triggered.connect(self.on_pushButton_clicked)
    def on_pushButton_clicked(self):
        connectClass = openNew(self)
        connectClass.pushButton.clicked.connect(self.funcfromMain)
        connectClass.show()
    def funcfromMain(self):
        pass