How to get text in QlineEdit when QpushButton is pressed in a string

Question

I am trying to implement a function  My code is given below   I want to get the text in lineedit with objectname  host  in a string say  shost  when the user clicks the pushbutton with name  connect   How can I do this  I tried and failed  How do I implement this function   import sys from PyQt4 QtCore import   from PyQt4 QtGui import     class Form QDialog       def   init   self  parent None           super Form  self    init   parent           le   QLineEdit           le setObjectName  host           le setText  Host           pb   QPushButton           pb setObjectName  connect           pb setText  Connect            layout addWidget le          layout addWidget pb          self setLayout layout           self connect pb  SIGNAL  clicked     self button click           self setWindowTitle  Learning        def button click self        i want the text in lineedit with objectname        host  in a string say  shost   when the user click        the pushbutton with name connect How do i do it        I tried and failed  How to implement this function      app   QApplication sys argv  form   Form   form show   app exec      Now how do I implement the function  button click    I have just started with pyQt

User · Accepted Answer

My first suggestion is to use Designer to create your GUIs. Typing them out yourself sucks, takes more time, and you will definitely make more mistakes than Designer.

Here are some PyQt tutorials to help get you on the right track. The first one in the list is where you should start.

A good guide for figuring out what methods are available for specific classes is the PyQt4 Class Reference. In this case you would look up QLineEdit and see the there is a text method.

To answer your specific question:

To make your GUI elements available to the rest of the object, preface them with self.

import sys
from PyQt4.QtCore import SIGNAL
from PyQt4.QtGui import QDialog, QApplication, QPushButton, QLineEdit, QFormLayout

class Form(QDialog):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)

        self.le = QLineEdit()
        self.le.setObjectName("host")
        self.le.setText("Host")

        self.pb = QPushButton()
        self.pb.setObjectName("connect")
        self.pb.setText("Connect") 

        layout = QFormLayout()
        layout.addWidget(self.le)
        layout.addWidget(self.pb)

        self.setLayout(layout)
        self.connect(self.pb, SIGNAL("clicked()"),self.button_click)
        self.setWindowTitle("Learning")

    def button_click(self):
        # shost is a QString object
        shost = self.le.text()
        print shost


app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()

User · Answer

Acepted solution implemented in PyQt5 import sys from PyQt5 QtWidgets import QApplication  QDialog  QFormLayout from PyQt5 QtWidgets import  QPushButton  QLineEdit   class Form QDialog       def   init   self  parent None           super Form  self    init   parent           self le   QLineEdit           self le setObjectName  quot host quot           self le setText  quot Host quot            self pb   QPushButton           self pb setObjectName  quot connect quot           self pb setText  quot Connect quot           self pb clicked connect self button click           layout   QFormLayout           layout addWidget self le          layout addWidget self pb          self setLayout layout           self setWindowTitle  quot Learning quot        def button click self             shost is a QString object         shost   self le text           print  shost    app   QApplication sys argv  form   Form   form show   app exec

User · Answer

The object name is not very important  what you should be focusing at is the variable that stores the lineedit object  le  and your pushbutton object pb    QObject self pb  SIGNAL  clicked      self button clicked   def button clicked self     self le setText  shost     I think this is what you want  I hope i got your question correctly

[python] How to get text in QlineEdit when QpushButton is pressed in a string?

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