Qmessagebox in pyqt5

• QMessageBox.about A dialog box pops up , Tell you what the result is . Here's the picture ：
  
• in fact QMessageBox Except for about Outside , And those used in our program QMessageBox.question
  
• QMessageBox.critical
  
• QMessageBox.warning
  
• QMessageBox.information
  
• QMessageBox The type of dialog box is just different from the icon, and there is no big difference between others .