help needed running a simple function in pyqt5

[menator01]

Here is an example of what you want I think. I did not do any kind of validation on what is being entered. text will probably crash it.

import random as rnd
import sys
from PyQt5.QtWidgets import (QMainWindow, QApplication, QWidget, QPushButton, QGridLayout, QLabel,
QLineEdit, QListWidget)


class Window(QMainWindow):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

        # Container
        container = QGridLayout()

        label = QLabel('How many spots')

        entry = QLineEdit()
        entry.setPlaceholderText('Enter a number here')
        entry.setStyleSheet('border: 1px solid black;')

        button = QPushButton('Submit')
        button.clicked.connect(lambda: self.picker(entry))

        self.listbox = QListWidget()

        container.addWidget(label, 0, 0, 1, 1)
        container.addWidget(entry, 0, 1, 1, 1)
        container.addWidget(button, 1, 0, 1, 2)
        container.addWidget(self.listbox, 2, 0, 1, 2)

        widget = QWidget()
        widget.setLayout(container)
        self.setCentralWidget(widget)

    def picker(self, spots):
        spots = int(spots.text())
        picks = []
        while len(picks) < spots:
            pick = rnd.randint(1, 49)
            if pick not in picks:
                picks.append(f'{pick}')
        nums = ', '.join(picks)
        self.listbox.addItem(nums)


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

main()