python super 的问题

Question

好的，下面的代码有点问题。它按原样工作，但如果我尝试更改有关我无法让 super 正常工作的评论的部分。

pipeline_class_call = super(Error_Popup,self)
broken_file_w_whats_wrong = pipeline_class_call.whats_wrong_with_file()

或到

 broken_file_w_whats_wrong = super(Error_Popup,self).whats_wrong_with_file()

并更改

class Error_Popup(QtGui.QDialog):

到

class Error_Popup(QtGui.QDialog,Pipeline_UI):

我收到以下错误

# TypeError: object of type 'instancemethod' has no len() #

这通常意味着我需要调用该方法，但不会为我超级处理所有这些。还是我在胡闹？

from PySide import QtCore, QtGui
from shiboken import wrapInstance
import pymel.core as pm
import maya.OpenMayaUI as omui
from UI.UI import Pipeline_UI

def something_bad_happened_window():
    sbh_pointer = omui.MQtUtil.mainWindow()
    return wrapInstance(long(sbh_pointer), QtGui.QWidget)

class Error_Popup(QtGui.QDialog):

    def __init__(self,parent=something_bad_happened_window()):
        super(Error_Popup,self).__init__(parent)

        self.setWindowTitle('Something Bad Happened!')
        self.setWindowFlags(QtCore.Qt.Tool)
        self.popup_layout()
        self.setAttribute(QtCore.Qt.WA_DeleteOnClose)
        self.connections()

    def popup_layout(self):
        self.file_description = QtGui.QListWidget()


        #cant seem to get super to work appropriately... booo
        pipeline_class_call = Pipeline_UI()
        broken_file_w_whats_wrong = pipeline_class_call.whats_wrong_with_file()

        for display in range(0,len(broken_file_w_whats_wrong)):

            broken_list = QtGui.QListWidgetItem()
            if display % 2 == 0:
                broken_list.setText(broken_file_w_whats_wrong[display][0])
                broken_list.asset = broken_file_w_whats_wrong[display][1]

            else:
                broken_list.setText("   " + broken_file_w_whats_wrong[display][0])

            self.file_description.addItem(broken_file_w_whats_wrong[display])

        self.import_button = QtGui.QPushButton('Import Replacement(s)')

        error_layout = QtGui.QVBoxLayout()
        error_layout.setContentsMargins(2,2,2,2)
        error_layout.setSpacing(2)


        error_layout.addWidget(self.file_description)
        error_layout.addWidget(self.import_button)

        error_layout.addStretch()


        self.setLayout(error_layout)

    def connections(self):
        self.import_button.clicked.connect(Error_Popup.make_sphere)


    @classmethod
    def make_sphere(cls):
        pm.polySphere()


def show_window():

    ui = Error_Popup()

    if __name__ == '__main__':
        try:
            ui.close()
        except:
            pass

    ui.show()

show_window()

提前谢谢大家

Answer 1

在我看来，这是使用具有多重继承的 super 的问题。它按特定顺序选择 parent 之一进行使用。例如，super(Error_Popup,self).__init__(parent) 仅调用 parent 的 __init__ 方法之一。您必须手动调用所有这些。

调用方法或访问变量时，您必须具体说明要使用哪个 parent，否则 super 会为您选择。参见 this answer and this answer。

python super 的问题

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python-2.7

pyside

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