全部问题

QFileDialog在PyQt中不起作用。

主要.py：

from PyQt5 import QtCore, QtGui, QtWidgets, QtMultimedia
import sys


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(634, 312)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.gridLayout = QtWidgets.QGridLayout(self.centralwidget)
        self.gridLayout.setObjectName("gridLayout")
        self.splitter = QtWidgets.QSplitter(self.centralwidget)
        self.splitter.setOrientation(QtCore.Qt.Horizontal)
        self.splitter.setObjectName("splitter")
        self.layoutWidget = QtWidgets.QWidget(self.splitter)
        self.layoutWidget.setObjectName("layoutWidget")
        self.verticalLayout_2 = QtWidgets.QVBoxLayout(self.layoutWidget)
        self.verticalLayout_2.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout_2.setObjectName("verticalLayout_2")
        self.horizontalLayout = QtWidgets.QHBoxLayout()
        self.horizontalLayout.setObjectName("horizontalLayout")
        self.label = QtWidgets.QLabel(self.layoutWidget)
        self.label.setObjectName("label")
        self.horizontalLayout.addWidget(self.label)
        self.lineEdit = QtWidgets.QLineEdit(self.layoutWidget)
        self.lineEdit.setObjectName("lineEdit")
        self.horizontalLayout.addWidget(self.lineEdit)
        self.pushButton = QtWidgets.QPushButton(self.layoutWidget)
        self.pushButton.setObjectName("pushButton")
        self.pushButton.clicked.connect(self.openFile1) # работает(привязыаем к действию)
        self.pushButton.clicked.connect(self.openFile) # работает(привязыаем к действию)

        self.horizontalLayout.addWidget(self.pushButton)
        self.verticalLayout_2.addLayout(self.horizontalLayout)
        self.horizontalLayout_2 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_2.setObjectName("horizontalLayout_2")
        self.label_2 = QtWidgets.QLabel(self.layoutWidget)
        self.label_2.setObjectName("label_2")
        self.horizontalLayout_2.addWidget(self.label_2)
        self.lineEdit_2 = QtWidgets.QLineEdit(self.layoutWidget)
        self.lineEdit_2.setObjectName("lineEdit_2")
        self.horizontalLayout_2.addWidget(self.lineEdit_2)
        spacerItem = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_2.addItem(spacerItem)
        self.verticalLayout_2.addLayout(self.horizontalLayout_2)
        self.horizontalLayout_3 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_3.setObjectName("horizontalLayout_3")
        spacerItem1 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_3.addItem(spacerItem1)
        self.pushButton_2 = QtWidgets.QPushButton(self.layoutWidget)
        self.pushButton_2.setObjectName("pushButton_2")
        self.horizontalLayout_3.addWidget(self.pushButton_2)
        spacerItem2 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_3.addItem(spacerItem2)
        self.verticalLayout_2.addLayout(self.horizontalLayout_3)
        spacerItem3 = QtWidgets.QSpacerItem(20, 40, QtWidgets.QSizePolicy.Minimum, QtWidgets.QSizePolicy.Expanding)
        self.verticalLayout_2.addItem(spacerItem3)
        self.layoutWidget1 = QtWidgets.QWidget(self.splitter)
        self.layoutWidget1.setObjectName("layoutWidget1")
        self.verticalLayout = QtWidgets.QVBoxLayout(self.layoutWidget1)
        self.verticalLayout.setContentsMargins(0, 0, 0, 0)
        self.verticalLayout.setObjectName("verticalLayout")
        self.horizontalLayout_4 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_4.setObjectName("horizontalLayout_4")
        self.checkBox_3 = QtWidgets.QCheckBox(self.layoutWidget1)
        self.checkBox_3.setObjectName("checkBox_3")
        self.horizontalLayout_4.addWidget(self.checkBox_3)
        self.label_3 = QtWidgets.QLabel(self.layoutWidget1)
        self.label_3.setObjectName("label_3")
        self.horizontalLayout_4.addWidget(self.label_3)
        spacerItem4 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_4.addItem(spacerItem4)
        self.verticalLayout.addLayout(self.horizontalLayout_4)
        self.horizontalLayout_5 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_5.setObjectName("horizontalLayout_5")
        self.checkBox = QtWidgets.QCheckBox(self.layoutWidget1)
        self.checkBox.setObjectName("checkBox")
        self.horizontalLayout_5.addWidget(self.checkBox)
        spacerItem5 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_5.addItem(spacerItem5)
        spacerItem6 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_5.addItem(spacerItem6)
        self.verticalLayout.addLayout(self.horizontalLayout_5)
        self.textEdit_2 = QtWidgets.QTextEdit(self.layoutWidget1)
        self.textEdit_2.setEnabled(False)
        self.textEdit_2.setObjectName("textEdit_2")
        self.verticalLayout.addWidget(self.textEdit_2)
        self.horizontalLayout_6 = QtWidgets.QHBoxLayout()
        self.horizontalLayout_6.setObjectName("horizontalLayout_6")
        self.checkBox_2 = QtWidgets.QCheckBox(self.layoutWidget1)
        self.checkBox_2.setObjectName("checkBox_2")
        self.horizontalLayout_6.addWidget(self.checkBox_2)
        spacerItem7 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_6.addItem(spacerItem7)
        spacerItem8 = QtWidgets.QSpacerItem(40, 20, QtWidgets.QSizePolicy.Expanding, QtWidgets.QSizePolicy.Minimum)
        self.horizontalLayout_6.addItem(spacerItem8)
        self.verticalLayout.addLayout(self.horizontalLayout_6)
        self.textEdit = QtWidgets.QTextEdit(self.layoutWidget1)
        self.textEdit.setEnabled(False)
        self.textEdit.setObjectName("textEdit")
        self.verticalLayout.addWidget(self.textEdit)
        self.gridLayout.addWidget(self.splitter, 0, 0, 1, 1)
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 634, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

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

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.label.setText(_translate("MainWindow", "ввдите имя файла"))
        self.pushButton.setText(_translate("MainWindow", "Ввод"))
        self.label_2.setText(_translate("MainWindow", "Кол-во частей"))
        self.pushButton_2.setText(_translate("MainWindow", "Расчёт"))
        self.checkBox_3.setText(_translate("MainWindow", "CheckBox"))
        self.label_3.setText(_translate("MainWindow", "Ввод дополнительных строк "))
        self.checkBox.setText(_translate("MainWindow", "Начало"))
        self.checkBox_2.setText(_translate("MainWindow", "Конец"))
        
    # Для открытия файла используем метод getOpenFileUrl() класса
    # QFileDialog, т. к. для создания экземпляра класса
    # QMediaContent нам нужен путь к файлу, заданный в виде
    # экземпляра класса QUrl
    def openFile(self):
        file = QtWidgets.QFileDialog.getOpenFileUrl(parent=self,
            caption="Выберите звуковой файл",
            filter="Звуковые файлы (*.mp3 *.ac3)")
        
    
    def openFile1(self):
            print("test")


if __name__ == "__main__":

    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

当我按下“Enter”按钮时，出现错误：

runfile('C:/Users/User/Desktop/Kononov/piton/gui.py', wdir='C:/Users/User/Desktop/Kononov/piton') 测试回溯（最近一次调用）：

openFile 文件中的文件 c:\users\user\desktop\kononov\piton\gui.py:142 = QtWidgets.QFileDialog.getOpenFileUrl(parent=self,

TypeError：getOpenFileUrl（父：可选[QWidget] = None，标题：可选[str] = ''，目录：QUrl = QUrl（），过滤器：可选[str] = ''，initialFilter：可选[str] = '' ，选项：Union[QFileDialog.Options，QFileDialog.Option] = 0，supportedSchemes：Iterable[Optional[str]] = []）：参数“parent”具有意外类型“Ui_MainWindow”

我无法弄清楚我做错了什么？

感觉好像我错过了一些重要的点，因为我在Qt Designer中创建了视图，然后在pyuic5.exe中运行它

我无法准确地表达这个问题，所以我会放几张照片。登录后，刷新页面时，始终仅向前加载文本（菜单部分的名称），然后才加载其他所有内容。告诉我需要修复或配置的位置和内容。我可以让您查看它或告诉我应该显示哪些代码。

有如下代码：

class MyClass {
public:
    void doWork() {
        std::this_thread::sleep_for(std::chrono::milliseconds(500));
        std::cout << "ID потока: " << std::this_thread::get_id() << "\tdoWork started\t" << "\n";
        std::this_thread::sleep_for(std::chrono::milliseconds(2000));
        std::cout << "ID потока: " << std::this_thread::get_id() << "\tdoWork stopped\t" << "\n";
    };

    void doWork2(int a) {
        std::this_thread::sleep_for(std::chrono::milliseconds(500));
        std::cout << "ID потока: " << std::this_thread::get_id() << "\tdoWork2 started\t" << "\n";
        std::this_thread::sleep_for(std::chrono::milliseconds(2000));
        std::cout << "Значение параметра doWork2 " << a;
        std::cout << "ID потока: " << std::this_thread::get_id() << "\tdoWork2 stopped\t" << "\n";
    };

    int sum(int a, int b) {
        std::this_thread::sleep_for(std::chrono::milliseconds(500));
        std::cout << "ID потока: " << std::this_thread::get_id() << "\tsum started\t" << "\n";
        std::this_thread::sleep_for(std::chrono::milliseconds(2000));
        std::cout << "ID потока: " << std::this_thread::get_id() << "\tsum stopped\t" << "\n";
        return a + b;
    }
};

int main() {
    setlocale(LC_ALL, "ru");

    MyClass class1;
    std::thread th1(&MyClass::doWork, class1);

    for (int i = 0; i < 3; ++i) {
        std::cout << "ID потока: " << std::this_thread::get_id() << "\tmain work\t" << i << "\n";
        std::this_thread::sleep_for(std::chrono::milliseconds(1000));
    };

    th1.join();
    return 0;
}

我正确地理解需要 join ，以便如果 main 提前完成，程序将等待 th1 创建的线程完成？

我也不太明白需要分离的情况。

detach 只会“让流自由浮动”，那么如何从中获取结果以及在什么情况下应该使用它而不是 join？

谢谢

几个人回复电子邮件，有时很难理解哪些已回复，哪些未回复

尝试保存它item.text_body并将其与答案进行比较

if item.text_body in saved_msg:
    print("Done")

当我意识到有很多不必要的事情后，我做了item.text_body.split("mailto:")[1] 同样的事情，并没有得到想要的结果

也许存在某种争论，例如item.message_id一封有回复的信或类似的东西？

不幸的是，我在文档中没有找到这样的信息。

我已经多次解决这个问题了，每次我都在挣扎，然后每次都忘记它:)

有一个带有字典的数字系统（即字母，而不是数字）并且没有零，即

A, B, ..., Z, AA, AB, ..., ZZ. AAA, ...

告诉我这些数字系统叫什么？！！！然后当我开始寻找时，我在第三天才找到它们

我什至不要求翻译算法，至少是名称:)（但你可以使用算法来节省精力）

本质上，这是 N 位数字典中 1..M 位数组合的序列号（itertools.product 的组合）