Introduction to Python

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Contents

How to install Python on Linux
How to run a Python program
The basic of Python codes
Data expressions
Built-in functions in Python
Interactive input/output
Conditional statement for Python
Loop structure for Python
Creating your own functions
Python modules
Reading/writing files for Python
Error handling code
Object Oriented Programming (OOP)
Tkinter package for GNU programming

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Tkinter package for GNU programming

There is a package called Tkinter to program GNU. Install it by typing "apt-get install python-tk" Here is a basic example using Tkinter.

from Tkinter import * class Keys(Frame):    def __init__(self):        Frame.__init__(self)        self.txtBox=Text(self)        #When typing 'quit', the program will exit.        self.txtBox.bind('quit',self.QuitEvent)        #The pack() determines the place.        self.txtBox.pack()        self.pack()    def QuitEvent(self,event):        import sys        sys.exit()

Make an instance and start the event. The mainloop() is a method in Tkinter to keep editing in the window until you close.

myApp = Keys() myApp.mainloop()

The typical widgets of Tkinter are: Frame; Button; Entry; Text; Radiobutton; PhotoImage; Listbox; Scrollbar; Checkbutton, etc.

You have to use <space> is for space-key for Tkinter.

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