python向后台写入信息

#!/usr/bin/python
#coding:utf-8
 
import sys
from PyQt4 import QtCore, QtGui
 
reload(sys)
sys.setdefaultencoding("utf-8")
 
class W2(QtGui.QDialog):
 
    myclicked = QtCore.pyqtSignal(str)   
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
      
         
        self.lineEdit = QtGui.QLineEdit()
        self.button = QtGui.QPushButton(u"con")
        
        layout = QtGui.QVBoxLayout()
        layout.addWidget(self.lineEdit)
        layout.addWidget(self.button)
        self.setLayout(layout)
        self.setWindowTitle(u"child")
 
 
        self.button.clicked.connect(self.infosend)
 
 
    def infosend(self):
        str1 = str(self.lineEdit.text()).encode(sys.getfilesystemencoding())
        self.myclicked.emit(str1)
 
        print str1

if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    myapp = W2()
    myapp.show()
    sys.exit(app.exec_())

#!/usr/bin/python
#coding:utf-8
 
import sys
from PySide2 import QtCore
from PySide2 import QtWidgets as QtGui
reload(sys)
sys.setdefaultencoding("utf-8")
 
 
 
 
class W2(QtGui.QDialog):
    myclicked = QtCore.Signal(str)   
    def __init__(self, parent=None):
        super(W2,self).__init__( parent)
      
         
        self.lineEdit = QtGui.QLineEdit()
        self.button = QtGui.QPushButton(u"con")
        
        layout = QtGui.QVBoxLayout()
        layout.addWidget(self.lineEdit)
        layout.addWidget(self.button)
        self.setLayout(layout)
        self.setWindowTitle(u"child")
 
 
        self.button.clicked.connect(self.infosend)
 
 
    def infosend(self):
        str = self.lineEdit.text()
        self.myclicked.emit(str)
 
        print str

 
if __name__ == "__main__":
    #app = QtGui.QApplication(sys.argv)
    myapp = W2()
    myapp.show()
    #sys.exit(app.exec_())

#!/usr/bin/python
#coding:utf-8
 
import sys
from PySide import QtCore, QtGui

reload(sys)
sys.setdefaultencoding("utf-8")
class W2(QtGui.QDialog):
 
    myclicked = QtCore.Signal(str)   
    def __init__(self, parent=None):
        super(W2,self).__init__(parent)
      
         
        self.lineEdit = QtGui.QLineEdit()
        self.button = QtGui.QPushButton(u"con")
        
        layout = QtGui.QVBoxLayout()
        layout.addWidget(self.lineEdit)
        layout.addWidget(self.button)
        self.setLayout(layout)
        self.setWindowTitle(u"child")
 
 
        self.button.clicked.connect(self.infosend)
 
 
    def infosend(self):
        str1 = str(self.lineEdit.text()).encode(sys.getfilesystemencoding())
        self.myclicked.emit(str1)
 
        print str1
  
if __name__ == "__main__":
    app = QtGui.QApplication(sys.argv)
    myapp = W2()
    myapp.show()
    sys.exit(app.exec_())