[英]pyqt4 python QT global
我寫了非常簡單的python&Qt代碼。
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s
try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)
class Ui_Form(object):
def setupUi(self, Form):
Form.setObjectName(_fromUtf8("Form"))
Form.resize(619, 501)
self.pushButton = QtGui.QPushButton(Form)
self.pushButton.setGeometry(QtCore.QRect(60, 460, 98, 27))
self.pushButton.setObjectName(_fromUtf8("pushButton"))
self.comboBox = QtGui.QComboBox(Form)
self.comboBox.setGeometry(QtCore.QRect(20, 410, 78, 27))
self.comboBox.setObjectName(_fromUtf8("comboBox"))
self.comboBox.addItem(_fromUtf8(""))
self.comboBox.addItem(_fromUtf8(""))
self.comboBox.addItem(_fromUtf8(""))
self.comboBox_2 = QtGui.QComboBox(Form)
self.comboBox_2.setGeometry(QtCore.QRect(120, 410, 78, 27))
self.comboBox_2.setObjectName(_fromUtf8("comboBox_2"))
self.comboBox_2.addItem(_fromUtf8(""))
self.comboBox_2.addItem(_fromUtf8(""))
self.comboBox_2.addItem(_fromUtf8(""))
self.label = QtGui.QLabel(Form)
self.label.setGeometry(QtCore.QRect(20, 380, 81, 21))
self.label.setObjectName(_fromUtf8("label"))
self.label_2 = QtGui.QLabel(Form)
self.label_2.setGeometry(QtCore.QRect(120, 380, 91, 21))
self.label_2.setObjectName(_fromUtf8("label_2"))
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
Form.setWindowTitle(_translate("Form", "Form", None))
self.pushButton.setText(_translate("Form", "BASLA", None))
self.comboBox.setItemText(0, _translate("Form", "780", None))
self.comboBox.setItemText(1, _translate("Form", "1350", None))
self.comboBox.setItemText(2, _translate("Form", "1850", None))
self.comboBox_2.setItemText(0, _translate("Form", "64", None))
self.comboBox_2.setItemText(1, _translate("Form", "128", None))
self.comboBox_2.setItemText(2, _translate("Form", "256", None))
self.label.setText(_translate("Form", "USRP FRQ", None))
self.label_2.setText(_translate("Form", "FFT BOYUTU", None))
def deger(self):
self.us=int(self.comboBox.currentText())
#print "USRP Frekansı",self.us
self.fft=int(self.comboBox_2.currentText())
#print "FFT Boyutu",self.fft
def basla(self):
QtCore.QObject.connect(self.pushButton, QtCore.SIGNAL("clicked()"), self.deger)
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
Form = QtGui.QWidget()
ui = Ui_Form()
ui.setupUi(Form)
ui.basla()
Form.show()
print ui.us
app.exec_()
當我運行程序時,我收到一條錯誤消息。 追溯(最近一次呼叫最近):打印ui.us中的文件“ ./dene.py”,第88行,AttributeError:'Ui_Form'對象沒有屬性'us'。
我試過了 :
def deger():
global us
us=int(comboBox.currentText())
我目前收到以下錯誤:
我們正在打印文件“ ./tt2.py”,行71,NameError:未定義全局名稱“ us”
造成此錯誤的原因是什么? 如何避免此錯誤? 請幫幫我
首先,不要使用全局變量。
關於你的問題。 您收到導入錯誤,因為在打印語句之前未分配self.us(您未調用方法“ deger”)。 無論如何,您應該使用PyQt ui生成器創建ui文件,這樣就不會出現此類錯誤。
我修改了您的代碼。 現在,它不再發出錯誤消息,並且單擊按鈕后,您將獲得打印組合框的內容。 如果仍然有任何問題,請告訴我。 我很樂意為您服務。
from PyQt4 import QtCore, QtGui
try:
_fromUtf8 = QtCore.QString.fromUtf8
except AttributeError:
def _fromUtf8(s):
return s
try:
_encoding = QtGui.QApplication.UnicodeUTF8
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig, _encoding)
except AttributeError:
def _translate(context, text, disambig):
return QtGui.QApplication.translate(context, text, disambig)
class Ui_Form(object):
def __init__(self):
self.us = None
def setupUi(self, Form):
Form.setObjectName(_fromUtf8("Form"))
Form.resize(619, 501)
self.pushButton = QtGui.QPushButton(Form)
self.pushButton.setGeometry(QtCore.QRect(60, 460, 98, 27))
self.pushButton.setObjectName(_fromUtf8("pushButton"))
self.comboBox = QtGui.QComboBox(Form)
self.comboBox.setGeometry(QtCore.QRect(20, 410, 78, 27))
self.comboBox.setObjectName(_fromUtf8("comboBox"))
self.comboBox.addItem(_fromUtf8(""))
self.comboBox.addItem(_fromUtf8(""))
self.comboBox.addItem(_fromUtf8(""))
self.comboBox_2 = QtGui.QComboBox(Form)
self.comboBox_2.setGeometry(QtCore.QRect(120, 410, 78, 27))
self.comboBox_2.setObjectName(_fromUtf8("comboBox_2"))
self.comboBox_2.addItem(_fromUtf8(""))
self.comboBox_2.addItem(_fromUtf8(""))
self.comboBox_2.addItem(_fromUtf8(""))
self.label = QtGui.QLabel(Form)
self.label.setGeometry(QtCore.QRect(20, 380, 81, 21))
self.label.setObjectName(_fromUtf8("label"))
self.label_2 = QtGui.QLabel(Form)
self.label_2.setGeometry(QtCore.QRect(120, 380, 91, 21))
self.label_2.setObjectName(_fromUtf8("label_2"))
self.retranslateUi(Form)
QtCore.QMetaObject.connectSlotsByName(Form)
def retranslateUi(self, Form):
Form.setWindowTitle(_translate("Form", "Form", None))
self.pushButton.setText(_translate("Form", "BASLA", None))
self.pushButton.clicked.connect(self.buttonAction)
self.comboBox.setItemText(0, _translate("Form", "780", None))
self.comboBox.setItemText(1, _translate("Form", "1350", None))
self.comboBox.setItemText(2, _translate("Form", "1850", None))
self.comboBox_2.setItemText(0, _translate("Form", "64", None))
self.comboBox_2.setItemText(1, _translate("Form", "128", None))
self.comboBox_2.setItemText(2, _translate("Form", "256", None))
self.label.setText(_translate("Form", "USRP FRQ", None))
self.label_2.setText(_translate("Form", "FFT BOYUTU", None))
def deger(self):
self.us=int(self.comboBox.currentText())
#print "USRP Frekansı",self.us
self.fft=int(self.comboBox_2.currentText())
#print "FFT Boyutu",self.fft
def buttonAction(self):
print("The button has been clicked")
print("Text in comboBox 1: " + self.comboBox.currentText())
print("Text in comboBox 2: " + self.comboBox_2.currentText())
if __name__ == "__main__":
import sys
app = QtGui.QApplication(sys.argv)
Form = QtGui.QWidget()
ui = Ui_Form()
ui.setupUi(Form)
Form.show()
print(ui.us)
app.exec_()
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