execute ping command with GUI

Question

While writing a GUI application in PyQt5 I encounter weird(for me) behavior. When I wanted to open an information window and start doing another thing after it fully loads.

Answer 1

Here is a single-line solution:

from PyQt5.QtWidgets import QApplication,QMessageBox
import sys
import os
app = QApplication(sys.argv)

box = QMessageBox()
box.setText("Text")
box.show()
QApplication.processEvents() # <------------ this one
os.system("ping 8.8.8.8 ")

sys.exit(app.exec())