PyQt5无法导入名称“QApplication”

Question

我正在尝试将代码从PyQt4转换为PyQt5，但我收到了错误。

from PyQt5.QtGui import QApplication, QPixmap
desktop = QApplication.desktop()
QPixmap.grabWindow(desktop.screen().winId()).save("screen.png", "PNG")


3.4.3 (v3.4.3:9b73f1c3e601, Feb 24 2015, 22:44:40) [MSC v.1600 64 bit (AMD64)]
Traceback (most recent call last):
  File "C:\Python34\Projects\name.py", line 7, in <module>
    from PyQt5.QtGui import QApplication, QPixmap
ImportError: cannot import name 'QApplication'

Answer 1

QApplication位于PyQt5.QtWidgets模块中。所以你的进口声明应该是：

from PyQt5.QtWidgets import QApplication

Answer 2

QApplication在PyQt5.qtwidget中。

所以应该是

from PyQt5.QtWidgets import QApplication