如何在PyQt5中修复模块的属性错误

Question

嗨:)请有人可以帮助我。我必须做一个分配，将一个LCDNumber小部件添加到Qtdesigner中的对话框，将ui文件转换为py，然后创建一个单独的脚本来导入代码以调用UI设计和显示，它还必须包含一个计时器以保持更新液晶显示屏。 这是我得到的错误

Traceback (most recent call last):
File "C:\PythonPrograms\showtime.pyw", line 4, in <module>
class MyForm(QtGui.QDialog):
AttributeError: 'module' object has no attribute 'QDialog'

---

from PyQt5 import QtCore, QtGui, QtWidgets

class Ui_Dialog(object):
def setupUi(self, Dialog):
    Dialog.setObjectName("Dialog")
    Dialog.resize(400, 300)
    self.lcdNumber = QtWidgets.QLCDNumber(Dialog)
    self.lcdNumber.setGeometry(QtCore.QRect(70, 20, 241, 151))
    self.lcdNumber.setObjectName("lcdNumber")

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

def retranslateUi(self, Dialog):
    _translate = QtCore.QCoreApplication.translate
    Dialog.setWindowTitle(_translate("Dialog", "Dialog"))


if __name__ == "__main__":
import sys
app = QtWidgets.QApplication(sys.argv)
Dialog = QtWidgets.QDialog()
ui = Ui_Dialog()
ui.setupUi(Dialog)
Dialog.show()
sys.exit(app.exec_())

接下来是文件showtime.pyw，该文件假设是从disptime.py导入代码以调用UI设计并显示

import sys
from disptime import *

class MyForm(QtGui.QDialog):
def __init__(self, parent=None):
    QtGui.__init__(self, parent)
    self.ui =Ui_Dialog()
    self.ui.setupUi(self)
    timer = QtCore.QTimer(self)
    timer.timeout.connect(self.showlcd)
    timer.start(1000)
    self.showlcd()

def showlcd(self):
    time = QtCore.QTime.currentTime()
    text = time.toString('hh:mm')
    self.ui.lcdNumber.display(text)

if __name__ == "__main__":
app = QtWidgets.QApplication(sys.argv)
myapp = MyForm()
myapp.show()
sys.exit(app.exec_())

Answer 1

尝试一下：

import sys
from PyQt5 import QtCore, QtGui, QtWidgets                # +++
from disptime import Ui_Dialog                            # * <-> Ui_Dialog

#class MyForm(QtGui.QDialog):                             # ---
#    def __init__(self, parent=None):                     # +++
#        QtGui.__init__(self, parent)                     # ---

class MyForm(QtWidgets.QDialog):                          # +++
    def __init__(self):                                   # +++
        super().__init__()                                # +++

        self.ui = Ui_Dialog()
        self.ui.setupUi(self)
        timer = QtCore.QTimer(self)
        timer.timeout.connect(self.showlcd)
        timer.start(1000)
        self.showlcd()

    def showlcd(self):
        time = QtCore.QTime.currentTime()
        text = time.toString('hh:mm')
        self.ui.lcdNumber.display(text)

if __name__ == "__main__":
    app = QtWidgets.QApplication(sys.argv)
    myapp = MyForm()
    myapp.show()
    sys.exit(app.exec_())