qt example

vcf_classifieur.py

from PySide2.QtWidgets import *
import sys


class MonWidget(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        hlayout = QHBoxLayout()

        self.left_button = QPushButton("<")

        hlayout.addWidget(self.left_button)
        hlayout.addWidget(QPushButton("True positive"))
        hlayout.addWidget(QPushButton("other"))
        hlayout.addWidget(QPushButton("False positive"))
        hlayout.addWidget(QPushButton(">"))
        hlayout.addWidget(QPushButton("Export results"))

        mlayout = QVBoxLayout()
        mlayout.addWidget(QLabel("A > C"))
        mlayout.addLayout(hlayout)
        self.setLayout(mlayout)

        self.left_button.clicked.connect(self.on_back)

    def on_back(self):
        print("action back")


if __name__ == "__main__":

    app = QApplication(sys.argv)

    w = MonWidget()
    w.show()

    app.exec_()

Installer pyside :

pip install PySide2