toolbar.py

from PyQt5.QtWidgets import *
import sys


class Window(QWidget):

    def __init__(self):
        QWidget.__init__(self)
        layout = QGridLayout()
        self.setLayout(layout)

        # Create pyqt toolbar
        toolBar = QToolBar()
        layout.addWidget(toolBar)

        # Add buttons to toolbar
        toolButton = QToolButton()
        toolButton.setText("Apple")
        toolButton.setCheckable(True)
        toolButton.setAutoExclusive(True)
        toolBar.addWidget(toolButton)
        toolButton = QToolButton()
        toolButton.setText("Orange")
        toolButton.setCheckable(True)
        toolButton.setAutoExclusive(True)
        toolBar.addWidget(toolButton)

        # Add textfield to window
        tbox = QPlainTextEdit()
        layout.addWidget(tbox)


app = QApplication(sys.argv)
screen = Window()
screen.show()
sys.exit(app.exec_())