Transcript Python - Department of Computer Science

COMPSCI 340 & SOFTENG 370
Semester 2 - 2014
Tutorial 1
About the tutor
• Name: Ahmad Obidat
• Qualifications:
– PhD in Information System, the University of
Auckland, 2011 – Present
– Education Specialist in Computer Science
Education, Florida Institute of Tech., 2009
– Master of Science in Computer Science Education,
Florida Institute of Tech., 2006
How can you contact me?
• Email: [email protected]
How and where can you meet me ?
• Weekly office hours on Monday from 12 pm to
2 pm
– Location: in the area across from Room 303.488
• By appointment: please, email me to set time
and place
Today’s Agenda
• Installing Ubuntu
• Java vs. Python
• Installing necessary apps for the course
Linux Distributions
• The most popular are Ubuntu, Red Hat, Fedora, SuSE,
PCLinuxOS, and MEPIS
• Which one to use?
– Any one should be fine
• Which one are we going to use?
– Ubuntu
• Why Ubuntu?
– User friendly
– Large user community
Installation
• Mainly, Ubuntu can be configured using three
different ways:
– To run Ubuntu without installing it on your hard drive, the
best way is to run it from CD/DVD
https://help.ubuntu.com/community/BurningIsoHowto
– Dual-boot system. Namely, you will have both Windows
and Linux available for booting
http://www.ubuntu.com/download/help/install-ubuntuwith-windows
– Using VMware Player: it creates isolated virtual machines
(we are going to use this method)
Installation using VMware Player
• Download the appropriate version of Ubuntu to your
hard drive from:
http://www.ubuntu.com/download/desktop
• Download VMware Player for Windows 32-bit and
64-bit from:
http://www.vmware.com/download/player/download.html
• Double click on VMware-player-6.0.3-1895310 exe
file
• Make sure you change the hardware settings when
installing (see next slides)
Select create New Virtual Machine
Select the second option and browse
to the iso file you downloaded.
Personal data
Enter a name for the virtual machine
Specify Disk Capacity
Give it up to 30 GB
New Virtual Machine Wizard
Select Customize Hardware
Specify the amount of memory
allocated for the virtual machine
Use the slider to choose the appropriate size as it is
advised by the legend.
Processor
Select number of processor cores.
3D Graphics
Make sure that the “Accelerate 3D graphics” checkbox is
checked.
Java vs. Python
• Python programs are typically 3-5 times
shorter than equivalent Java programs
• Python programs take much less time to
develop than Java ones
• Python is built-in high-level data types and
dynamic typing
• Python provides an operating system module
which gives connection to Unix system calls.
Java vs. Python
Java
public class HelloWorld
{
public static void main
(String[] args)
{
System.out.println("Hello,
world!");
}
}
Python
print("Hello, world!")
Java vs. Python
Java
Python
public class MainClass {
public static void main(String[] args) {
int
start = 1;
int
end = 100;
int theSum = sumRange( start, end );
System.out.println ("The sum of the integers between " +
start + " and " + end + " is " + theSum);
}
public static int sumRange(int first, int last) {
int total = 0;
int i = first;
while (i <= last )
{
total+= i;
i ++;
}
return total;
}
}
def sumRange( first, last ) :
total = 0
i = first
while i <= last :
total = total + i
i=i+1
return total
start = 1
end = 100
theSum = sumRange( start, end )
print ("The sum of the integers
between", start,\
"and", end, "is", theSum)
Java vs. Python
Java
public class PrintList {
public static void main(String[] args) {
int [] gradeList = { 85, 90, 87, 65, 91 };
System.out.print( "[" );
for( int i = 0; i < gradeList.length; i++ ) {
System.out.print( gradeList[ i ] );
if( i < gradeList.length-1 )
System.out.print( ", " );
}
System.out.println( "]" );
}
}
Python
gradeList = [ 85, 90, 87, 65, 91 ]
print (gradeList)
Installing Python 3
Installing Python3 cont.
Click on “Developer Tools”
Installing Python3 cont.
Click on “Python”
Installing Python3 cont.
IDLE (using Python-3.4)
Installing Python3 cont.
Click on “Install”
Installing Python3 cont.
Editing python code with gedit and
running it from the command line
• Search for “gedit” and then click on the “Text
Editor” icon
Editing python code with gedit and
running it from the command line cont.
Editing python code with gedit and
running it from the command line cont.
References
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Python v3.4.1 documentation
Python operating system interfaces
Python 2 for Java programmers
Java for Python Programmers
From Python to Java