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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Conditional statement for Python

The conditional statement takes a collon after each command. Also the indents are part of the program to separate each section, so it must be ordered to be processed properly.

score=81 if score>=80:    print "Passed!" else:    print "Failed..."

$ Passed!

The following is the equivalent program. Note that you can use "if" and "else" without colons:

print "Passed!" if score>=80 else "Failed..."

The "else if" command for python is "elif."

score1=65 if score1>=80:    print "A" elif score1>=70:    print "B" elif score1>=60:    print "C" else:    print "F"

$ Keep making efforts.

The condition can have a range as follows:

if 60<score1<79:    print "Keep making efforts.\n"

Boolean operators can be used for the conditions.

a=30 if (a>40) or (a<):    print "The value is in the range.\n" else:    print "The value is out of the range.\n"

$ The value is out of the range.

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