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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Object Oriented Programming (OOP)

Here is an example of the object oriented program for python. The method, __init__(), means to perform when being made an instance. (Note that you have to use an underscore twice.)

class Human(object):    def __init__(self,name): #Object's variable      self.name=name    def intro(self): #Object's method      print "My name is %s" % self.name mike = Human("Mike") don = Human("Don") print mike.name mike.intro() don.intro()

$ Mike $ My name is Mike $ My name is Don

Inheritance is an important concept for OOP. The following is a simple example of inheritance of the above code.

class Human(object):    def __init__(self,name):      self.name=name    def intro(self):      print "My name is %s" % self.name class MetaHuman(Human):    def think(self):      print "%s is a philosopher..." % self.name mike = Human("Mike") don = MetaHuman("Don") mike.intro() don.think()

$ My name is Mike $ Don is a philosopher...

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