help needed running a simple function in pyqt5

[diodes]

Here is the final code on the Ultimate Roulette picker if anyone is interested

import random as rnd
import sys
from PyQt5.QtWidgets import (QMainWindow, QApplication, QWidget, QPushButton, QGridLayout, QLabel,
QLineEdit, QListWidget, QMessageBox)
 
 
class Window(QMainWindow):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
 
        # Container
        container = QGridLayout()

        label = QLabel('Ultimate Roulette')
        label2 = QLabel('Side Bets and More')

        
        button = QPushButton('Spin')
        button2 = QPushButton('clear')
        button.clicked.connect(lambda: self.odd_even())
        button2.clicked.connect(self.clear)
        spinbtn = QPushButton('Numbers')
        spinbtn.clicked.connect(lambda: self.numpick())
        self.listbox = QListWidget()

        container.addWidget(label, 0, 0, 1, 1)
        container.addWidget(label2, 0, 1, 1, 1)
        container.addWidget(button, 1, 0, 1, 1)
        container.addWidget(button2, 1, 1, 1, 2)
        container.addWidget(self.listbox, 2, 0 ,1 ,2)
        container.addWidget(spinbtn, 4, 0, 1, 2)
        
        widget = QWidget()
        widget.setLayout(container)
        self.setCentralWidget(widget)

    def odd_even(self):
        for i in range(1):
            self.listbox.addItem(f"{rnd.choice(('odd,', 'even,'))} {rnd.choice(('red,', 'black,'))} {rnd.choice(('1st,', '2nd,', '3rd,'))} {rnd.choice(('top 1/2', 'Bottom 1/2'))}")
            #self.listbox.addItem(f"{rnd.choice(('1st', '2nd', '3rd'))}")
            #self.listbox.addItem(f"{rnd.choice(('top 1/2', 'Bottom 1/2'))}")

    def numpick(self):
        spots = 3
        picks = []
        while len(picks) < spots:
             pick = rnd.randint(0, 37)
             if pick not in picks:
                 picks.append(f'{pick}')
        nums = ', '.join(picks)
        self.listbox.addItem(nums)
           

    def clear(self):
        self.listbox.clear()

    

def main():
    app = QApplication(sys.argv)
    window = Window()
    window.show()
    sys.exit(app.exec_())
 
main()

Python is a great language. with the stuff I just learned I will make an automatic dice roller :)