如何删除 QBoxLayout（QBoxLayout.TopToBottom） 中 2 个小部件之间的间距

问：

我正在使用 PyQt5 作为参考，其中我有一个带有参数的参数，我正在尝试删除小部件之间的间距，如下所示：QBoxLayoutQBoxLayout.TopToBottom

我尝试使用甚至尝试制作一个自定义类，我在 init 函数中定义了它们，但没有修复。 如果你们需要其他任何东西，我可以重新格式化/添加这个问题。作为记录，标签下的那些小部件是 UPDATE： 下面是图像的代码：QBoxLayout.setSpacing(0)QBoxLayout.setContentMargins(0,0,0,0)QBoxLayoutQProgressbar

class LearnLeftPanelQBox(QBoxLayout):
        def __init__(self):
            super().__init__(QBoxLayout.TopToBottom)
            self.setContentsMargins(0,0,0,0)
            self.setSpacing(0)

self.learnLeftPanelTitle=QLabel("Correct:")
            self.learnLeftPanelTopLayout.addWidget(self.learnLeftPanelTitle)
            self.learnLeftPanelTitle.setStyleSheet("font: 20pt Comic Sans MS; color: white;")
            self.learnLeftPanelTopLayout.addWidget(self.learnLeftPanelTitle)
            self.learnLeftPanelProgressCorrect=QProgressBar()
            self.learnLeftPanelProgressCorrect.setStyleSheet("font: 20pt Comic Sans MS; color: green;")
            self.learnLeftPanelTopLayout.addWidget(self.learnLeftPanelProgressCorrect)
            self.learnLeftPanelTitle=QLabel("Incorrect:")
            self.learnLeftPanelTopLayout.addWidget(self.learnLeftPanelTitle)
            self.learnLeftPanelTitle.setStyleSheet("font: 20pt Comic Sans MS; color: white;")
            self.learnLeftPanelProgressIncorrect=QProgressBar()
            self.learnLeftPanelProgressIncorrect.setStyleSheet("font: 20pt Comic Sans MS; color: red;")
            self.learnLeftPanelTopLayout.addWidget(self.learnLeftPanelProgressIncorrect)
            self.learnLeftPanelLayout.addWidget(self.learnLeftPanelTop)
            self.learnLeftPanelSettingsButton=QPushButton("Settings")
            self.learnLeftPanelSettingsButton.setStyleSheet("QPushButton{font: 20pt Comic Sans MS; color: white;border-style: outset; border-width: 2px; border-radius: 10px;border-color:white;} QPushButton::hover{background-color: white; color: black;}")
            self.learnLeftPanelSettingsButton.clicked.connect(self._showLearnSettings)
            self.learnLeftPanelLayout.addWidget(self.learnLeftPanelSettingsButton)

这里的选项卡格式搞砸了，但堆栈溢出不允许我修复它。这些都在一个单独的函数中找到，其余的与此无关。

我最好的可重复答案：

# Purpose: Stack layout example
from PyQt5.QtWidgets import QWidget, QLabel,QProgressBar,QApplication,QBoxLayout
class main(QWidget):
    def __init__(self) -> None:
        super().__init__()
        self.showFullScreen()
        layout=QBoxLayout(QBoxLayout.TopToBottom)
        layout.setContentsMargins(0,0,0,0)
        firstLabel=QLabel("First Label")
        firstBar=QProgressBar()
        secondLabel=QLabel("Second Label")
        secondBar=QProgressBar()
        layout.addWidget(firstLabel)
        layout.addWidget(firstBar)
        layout.addWidget(secondLabel)
        layout.addWidget(secondBar)
        self.setLayout(layout)
if __name__=="__main__":
    import sys
    app = QApplication(sys.argv)
    win = main()
    win.show()
    sys.exit(app.exec_())