Difference between revisions of "Development/Tutorials/Python-hello world"

Latest revision as of 21:54, 29 June 2011

This is an example application in python using KDE bindings. It builds up two buttons. You need a layout for this, that is also demonstrated. One button exits the program, the other button does a trivial action as a demo, in this case, print "hello world" to the console (more exactly: to stdout). Save the code below as a file named hello.

from PyQt4.QtGui import *
from PyQt4.QtCore import *
import sys
 
def greet():
  print ("hello world")
 
#First we create a QApplication and QPushButton
app=QApplication(sys.argv)
 
win = QWidget()
qgl = QGridLayout(win)
button1=QPushButton(win)
button2=QPushButton(win)
button1.setText("greet")
button2.setText("exit")
qgl.addWidget(button1)
qgl.addWidget(button2)
 
# Connect buttons to actions
QObject.connect(button1,SIGNAL("clicked()"),greet)
QObject.connect(button2,SIGNAL("clicked()"),app.exit)
 
win.show()
#Start the evnt loop
sys.exit(app.exec_())

Call this program like this:

python hello

@@ Line 4: / Line 4: @@
 This is an example application in python using KDE bindings. It builds up two buttons. You need a layout for this, that is also demonstrated. One button exits the program, the other button does a trivial action as a demo, in this case, print "hello world" to the console (more exactly: to stdout). Save the code below as a file named hello.
-<code python>
+<syntaxhighlight lang="python">
 from PyQt4.QtGui import *
 from PyQt4.QtCore import *
@@ Line 32: / Line 32: @@
 sys.exit(app.exec_())
-</code>
+</syntaxhighlight>
 Call this program like this:
   python hello