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我是PyGt的一名完全新手程序员。我已经阅读了关于PyGt4的书,但现在我们有了PyGt5,而且我无法从书中运行我的例子。如何将此代码从PyQt4转换为PyQt5
例如,这是从书(最简单的)第一个例子中可以看到
from PyQt5 import QtCore, QtGui
但它在书中
from PyQt4 import QtCore, QtGui
,但我写PyQt5,因为我只有PyQt5
# -*- coding: utf-8 -*-
from PyQt5 import QtCore, QtGui
import sys
app = QtGui.QApplication(sys.argv)
window = QtGui.QWidget()
window.setWindowTitle("The first program in PyQt")
window.resize(300, 70)
label = QtGui.QLabel("<center>Hello, world!</center>")
btnQuit = QtGui.QPushButton("&Close window")
vbox = QtGui.QVBoxLayout()
vbox.addWidget(label)
vbox.addWidget(btnQuit)
window.setLayout(vbox)
QtCore.QObject.connect(btnQuit, QtCore.SIGNAL("clicked()"),
QtGui.qApp, QtCore.SLOT("quit()"))
window.show()
sys.exit(app.exec_())
错误:AttributeError:模块'PyQt5.QtGui'没有属性'QApplication'
我试图找到解决办法: 我试图运行此代码。不起作用。我的程序工作,但我不能关闭按钮“关闭窗口”
from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5 import QtCore, QtGui
from PyQt5.QtCore import QObject, pyqtSignal
from PyQt5.QtWidgets import *
import sys
app = QApplication(sys.argv)
window = QWidget()
window.setWindowTitle("The first example in PyQt")
window.resize(300, 70)
label = QLabel("<center>Hello, world!</center>")
btnQuit = QPushButton("&Close window")
vbox = QVBoxLayout()
vbox.addWidget(label)
vbox.addWidget(btnQuit)
window.setLayout(vbox)
closed = pyqtSignal()
range_changed = pyqtSignal(int, int, name='rangeChanged')
valueChanged = pyqtSignal([int], ['QString'])
window.show()
sys.exit(app.exec_())
一般:检查(PY)QT5的文档和搜索缺课。它可能只是在另一个模块中。 – Trilarion
http://pyqt.sourceforge.net/Docs/PyQt5/pyqt4_differences.html – matth