Pyqt5运行pyqt4各种错误解决方法汇总

1.NameError: name ‘QApplication’ is not defined

from PyQt5.QtWidgets import QApplication

2.NameError: name ‘QLabel’ is not defined

from PyQt5.QtWidgets import *

3.NameError: name ‘QDialog’ is not defined

from PyQt5.QtWidgets import QInputDialog, QLineEdit, QDialog