构造水平布局, 在水平布局上添加按钮，同时调节了按钮之间的间距

HBoxLayout.py 

"""
水平盒布局(QHBoxLayout)
"""

import sys, math
from PyQt5.QtWidgets import *


class HBoxLayout(QWidget):
    def __init__(self):
        super(HBoxLayout, self).__init__()
        self.setWindowTitle("水平盒布局")

        hlayout = QHBoxLayout()
        hlayout.addWidget(QPushButton('按钮1'))
        hlayout.addWidget(QPushButton('按钮2'))
        hlayout.addWidget(QPushButton('按钮3'))
        hlayout.addWidget(QPushButton('按钮4'))
        hlayout.addWidget(QPushButton('按钮5'))

        #设置按钮的间距
        hlayout.setSpacing(100)
        self.setLayout(hlayout)


if __name__ == "__main__":
    app = QApplication(sys.argv)

    main = HBoxLayout()
    main.show()

    sys.exit(app.exec_())