python - Qt5: AttributeError: 'module' 对象没有属性 'QApplication'

Question

系统:15.10(狡猾的狼人)x64

代码:

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'test.ui'
#
# Created by: PyQt5 UI code generator 5.5.1
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(400, 300)
        self.pushButton = QtWidgets.QPushButton(Form)
        self.pushButton.setGeometry(QtCore.QRect(120, 120, 85, 26))
        self.pushButton.setObjectName("pushButton")

        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form)

    def retranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form", "Form"))
        self.pushButton.setText(_translate("Form", "PushButton"))

if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    ex = Ui_Form()
    ex.show()
    sys.exit(app.exec_())

我收到以下错误:

    app = QtGui.QApplication(sys.argv)
AttributeError: 'module' object has no attribute 'QApplication'

基本上，我用Qt5设计了GUI，然后使用了pyuic5。我已经安装了 PyQt5，不确定安装是否按预期进行。

用户界面设计:

任何帮助将不胜感激。

Answer 1

我不确定你的 main 函数是如何生成的。我尝试使用似乎相同版本的 pyuic5 来复制它。我使用命令行 pyuic5 -x untitled.ui 调用它(其中您的情况下的 ui 仅包含小部件中的 PushButton)。 -x 选项的作用是:“生成的 Python 代码包含少量附加代码，这些代码在作为独立应用程序执行时创建和显示 GUI。” ( http://pyqt.sourceforge.net/Docs/PyQt5/designer.html ) 我得到的结果是

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'untitled.ui'
#
# Created by: PyQt5 UI code generator 5.5.1
#
# WARNING! All changes made in this file will be lost!

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Form(object):
    def setupUi(self, Form):
        Form.setObjectName("Form")
        Form.resize(400, 300)
        self.pushButton = QtWidgets.QPushButton(Form)
        self.pushButton.setGeometry(QtCore.QRect(70, 50, 75, 23))
        self.pushButton.setObjectName("pushButton")

        self.retranslateUi(Form)
        QtCore.QMetaObject.connectSlotsByName(Form)

    def retranslateUi(self, Form):
        _translate = QtCore.QCoreApplication.translate
        Form.setWindowTitle(_translate("Form", "Form"))
        self.pushButton.setText(_translate("Form", "PushButton"))


if __name__ == "__main__":
    import sys
    app = QtWidgets.QApplication(sys.argv)
    Form = QtWidgets.QWidget()
    ui = Ui_Form()
    ui.setupUi(Form)
    Form.show()
    sys.exit(app.exec_())

它有不同的主要功能。其余代码是等效的。