python - 如何调整在pyqt5的垂直框布局中添加的小部件的几何形状

你需要设置布局的对齐方式，并在所添加的小部件之间添加一些间距，如下所示：

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QVBoxLayout, QWidget, QPushButton
from PyQt5 import QtCore


class MainWindow(QMainWindow):

    def __init__(self, *args, **kwargs):
        super(MainWindow, self).__init__(*args, **kwargs)

        layout = QVBoxLayout()
        #set spacing between your widgets
        layout.setSpacing(5)
        #set alignment in your vertical layout
        layout.setAlignment(QtCore.Qt.AlignTop)
        widget = QWidget()
        widget.setLayout(layout)

        self.setCentralWidget(widget)

        button1 = QPushButton('Button 1', self)
        layout.addWidget(button1)

        button2 = QPushButton('Button 2', self)
        layout.addWidget(button2)


app = QApplication(sys.argv)
main_window = MainWindow()
main_window.show()
sys.exit(app.exec_())