A intro to the Python programming language and why you should use it, with comparisons and applications of use.

1. Why Learn Python?
Intro by Christine Cheung

2. Programming

3. Programming
How many of you have programmed before?

4. Programming
How many of you have programmed before?
What is the purpose?

5. Programming
How many of you have programmed before?
What is the purpose?
Make - create an app

6. Programming
How many of you have programmed before?
What is the purpose?
Make - create an app
Break - edit an app

7. Programming
How many of you have programmed before?
What is the purpose?
Make - create an app
Break - edit an app
Understand - how or why does it work?

8. Okay cool, but why
Python?

9. Okay cool, but why
Python?
Make - simple to get started

10. Okay cool, but why
Python?
Make - simple to get started
Break - easy to read and edit code

11. Okay cool, but why
Python?
Make - simple to get started
Break - easy to read and edit code
Understand - modular and abstracted

12. Show me the Money

13. Show me the Money
IT Salaries are up

14. Show me the Money
IT Salaries are up
Python is 4th top growing skill in past 3
months

15. Show me the Money
IT Salaries are up
Python is 4th top growing skill in past 3
months
Average starting Python programmer salary

16. Show me the Money
IT Salaries are up
Python is 4th top growing skill in past 3
months
Average starting Python programmer salary
70k+

17. Show me the Money
IT Salaries are up
Python is 4th top growing skill in past 3
months
Average starting Python programmer salary
70k+
Sources:
- http://www.readwriteweb.com/enterprise/2011/05/it-hiring-and-salaries-up---wh.php
- http://www.payscale.com/research/US/Skill=Python/Salary

18. History + Facts

19. History + Facts
Created by Guido van Rossum in late 80s

20. History + Facts
Created by Guido van Rossum in late 80s
“Benevolent Dictator for Life” now at Google

21. History + Facts
Created by Guido van Rossum in late 80s
“Benevolent Dictator for Life” now at Google
Fun and Playful

22. History + Facts
Created by Guido van Rossum in late 80s
“Benevolent Dictator for Life” now at Google
Fun and Playful
Name is based off Monty Python

23. History + Facts
Created by Guido van Rossum in late 80s
“Benevolent Dictator for Life” now at Google
Fun and Playful
Name is based off Monty Python
Spam and Eggs!

24. Strengths

25. Strengths
Easy for beginners

26. Strengths
Easy for beginners
...but powerful enough for professionals

27. Strengths
Easy for beginners
...but powerful enough for professionals
Clean and elegant code

28. Strengths
Easy for beginners
...but powerful enough for professionals
Clean and elegant code
whitespace enforcement

29. Strengths
Easy for beginners
...but powerful enough for professionals
Clean and elegant code
whitespace enforcement
Many modules and libraries to import from

30. Strengths
Easy for beginners
...but powerful enough for professionals
Clean and elegant code
whitespace enforcement
Many modules and libraries to import from
Cross platform - Windows, Mac, Linux

31. Strengths
Easy for beginners
...but powerful enough for professionals
Clean and elegant code
whitespace enforcement
Many modules and libraries to import from
Cross platform - Windows, Mac, Linux
Supportive, large, and helpful community

32. BASIC

33. BASIC
10 INPUT A
20 INPUT B
30 C=A+B
40 PRINT C
RUN

34. C

35. C
#include <stdio.h>
int main(int argc, char*argv[])
{
int a,b,c;
scanf("%d",&a);
scanf("%d",&b);
c = a+b;
printf("%dn",c);
}
$ gcc -o add add.c
$ ./add

36. C
#include <stdio.h>
int main(int argc, char*argv[])
{
int a,b,c;
standard input/output
scanf("%d",&a);
scanf("%d",&b);
c = a+b;
printf("%dn",c);
}
$ gcc -o add add.c
$ ./add

37. C
#include <stdio.h>
int main(int argc, char*argv[])
{
int a,b,c;
standard input/output
scanf("%d",&a);
scanf("%d",&b); return types
c = a+b;
printf("%dn",c);
}
$ gcc -o add add.c
$ ./add

38. C
#include <stdio.h>
int main(int argc, char*argv[])
{
int a,b,c;
standard input/output
scanf("%d",&a);
scanf("%d",&b); return types
c = a+b; scanf limitations
printf("%dn",c);
}
$ gcc -o add add.c
$ ./add

39. C
#include <stdio.h>
int main(int argc, char*argv[])
{
int a,b,c;
standard input/output
scanf("%d",&a);
scanf("%d",&b); return types
c = a+b; scanf limitations
printf("%dn",c);
compiling
}
$ gcc -o add add.c
$ ./add

40. C
#include <stdio.h>
int main(int argc, char*argv[])
{
int a,b,c;
standard input/output
scanf("%d",&a);
scanf("%d",&b); return types
c = a+b; scanf limitations
printf("%dn",c);
compiling
}
...and not to mention memory
$ gcc -o add add.c allocation, pointers, variable types...
$ ./add

41. Java

42. Java
import java.io.*;
public class Addup
{
static public void main(String args[]) {
InputStreamReader stdin = new InputStreamReader(System.in);
BufferedReader console = new BufferedReader(stdin);
int i1 = 0,i2 = 0;
String s1,s2;
try {
s1 = console.readLine();
i1 = Integer.parseInt(s1);
s2 = console.readLine();
i2 = Integer.parseInt(s2);
}
catch(IOException ioex) {
System.out.println("Input error");
System.exit(1);
}
catch(NumberFormatException nfex) {
System.out.println(""" + nfex.getMessage() + "" is not
numeric");
System.exit(1);
}
System.out.println(i1 + " + " + i2 + " = " + (i1+i2));
System.exit(0);
}
}
$ javac Addup.java
$ java Addup

43. Java
import java.io.*;
public class Addup
{ classes, arguments
static public void main(String args[]) {
InputStreamReader stdin = new InputStreamReader(System.in);
BufferedReader console = new BufferedReader(stdin);
int i1 = 0,i2 = 0;
String s1,s2;
try {
s1 = console.readLine();
i1 = Integer.parseInt(s1);
s2 = console.readLine();
i2 = Integer.parseInt(s2);
}
catch(IOException ioex) {
System.out.println("Input error");
System.exit(1);
}
catch(NumberFormatException nfex) {
System.out.println(""" + nfex.getMessage() + "" is not
numeric");
System.exit(1);
}
System.out.println(i1 + " + " + i2 + " = " + (i1+i2));
System.exit(0);
}
}
$ javac Addup.java
$ java Addup

44. Java
import java.io.*;
public class Addup
{ classes, arguments
static public void main(String args[]) {
InputStreamReader stdin = new InputStreamReader(System.in);
BufferedReader console = new BufferedReader(stdin);
int i1 = 0,i2 = 0;
input stream, buffer
String s1,s2;
try {
s1 = console.readLine();
i1 = Integer.parseInt(s1);
s2 = console.readLine();
i2 = Integer.parseInt(s2);
}
catch(IOException ioex) {
System.out.println("Input error");
System.exit(1);
}
catch(NumberFormatException nfex) {
System.out.println(""" + nfex.getMessage() + "" is not
numeric");
System.exit(1);
}
System.out.println(i1 + " + " + i2 + " = " + (i1+i2));
System.exit(0);
}
}
$ javac Addup.java
$ java Addup

45. Java
import java.io.*;
public class Addup
{ classes, arguments
static public void main(String args[]) {
InputStreamReader stdin = new InputStreamReader(System.in);
BufferedReader console = new BufferedReader(stdin);
int i1 = 0,i2 = 0;
input stream, buffer
String s1,s2;
try {
s1 = console.readLine(); variable types
i1 = Integer.parseInt(s1);
s2 = console.readLine();
i2 = Integer.parseInt(s2);
}
catch(IOException ioex) {
System.out.println("Input error");
System.exit(1);
}
catch(NumberFormatException nfex) {
System.out.println(""" + nfex.getMessage() + "" is not
numeric");
System.exit(1);
}
System.out.println(i1 + " + " + i2 + " = " + (i1+i2));
System.exit(0);
}
}
$ javac Addup.java
$ java Addup

46. Java
import java.io.*;
public class Addup
{ classes, arguments
static public void main(String args[]) {
InputStreamReader stdin = new InputStreamReader(System.in);
BufferedReader console = new BufferedReader(stdin);
int i1 = 0,i2 = 0;
input stream, buffer
String s1,s2;
try {
s1 = console.readLine(); variable types
i1 = Integer.parseInt(s1);
s2 = console.readLine();
i2 = Integer.parseInt(s2); try, catch, exceptions
}
catch(IOException ioex) {
System.out.println("Input error");
System.exit(1);
}
catch(NumberFormatException nfex) {
System.out.println(""" + nfex.getMessage() + "" is not
numeric");
System.exit(1);
}
System.out.println(i1 + " + " + i2 + " = " + (i1+i2));
System.exit(0);
}
}
$ javac Addup.java
$ java Addup

47. Java
import java.io.*;
public class Addup
{ classes, arguments
static public void main(String args[]) {
InputStreamReader stdin = new InputStreamReader(System.in);
BufferedReader console = new BufferedReader(stdin);
int i1 = 0,i2 = 0;
input stream, buffer
String s1,s2;
try {
s1 = console.readLine(); variable types
i1 = Integer.parseInt(s1);
s2 = console.readLine();
i2 = Integer.parseInt(s2); try, catch, exceptions
}
catch(IOException ioex) {
System.out.println("Input error"); system.out
System.exit(1);
}
catch(NumberFormatException nfex) {
System.out.println(""" + nfex.getMessage() + "" is not
numeric");
System.exit(1);
}
System.out.println(i1 + " + " + i2 + " = " + (i1+i2));
System.exit(0);
}
}
$ javac Addup.java
$ java Addup

48. Java
import java.io.*;
public class Addup
{ classes, arguments
static public void main(String args[]) {
InputStreamReader stdin = new InputStreamReader(System.in);
BufferedReader console = new BufferedReader(stdin);
int i1 = 0,i2 = 0;
input stream, buffer
String s1,s2;
try {
s1 = console.readLine(); variable types
i1 = Integer.parseInt(s1);
s2 = console.readLine();
i2 = Integer.parseInt(s2); try, catch, exceptions
}
catch(IOException ioex) {
System.out.println("Input error"); system.out
System.exit(1);
}
catch(NumberFormatException nfex) {
System.out.println(""" + nfex.getMessage() + "" is not
compiling
numeric");
System.exit(1);
}
System.out.println(i1 + " + " + i2 + " = " + (i1+i2));
System.exit(0);
}
}
$ javac Addup.java
$ java Addup

49. Java
import java.io.*;
public class Addup
{ classes, arguments
static public void main(String args[]) {
InputStreamReader stdin = new InputStreamReader(System.in);
BufferedReader console = new BufferedReader(stdin);
int i1 = 0,i2 = 0;
input stream, buffer
String s1,s2;
try {
s1 = console.readLine(); variable types
i1 = Integer.parseInt(s1);
s2 = console.readLine();
i2 = Integer.parseInt(s2); try, catch, exceptions
}
catch(IOException ioex) {
System.out.println("Input error"); system.out
System.exit(1);
}
catch(NumberFormatException nfex) {
System.out.println(""" + nfex.getMessage() + "" is not
compiling
numeric");
System.exit(1);
} however, at least you don’t
System.out.println(i1 + " + " + i2 + " = " + (i1+i2));
System.exit(0);
have to deal with garbage
} collection... :)
}
$ javac Addup.java
$ java Addup

50. Python

51. Python
a = input()
b = input()
c = a + b
print c
$ python add.py

52. More Tech Talking
Points

53. More Tech Talking
Points
Indentation enforces good programming style

54. More Tech Talking
Points
Indentation enforces good programming style
can read other’s code, and not obfuscated

55. More Tech Talking
Points
Indentation enforces good programming style
can read other’s code, and not obfuscated
sub b{$n=99-@_-$_||No;"$n bottle"."s"x!!--$n." of beer"};$w=" on the
wall"; die map{b."$w,n".b.",nTake one down, pass it around,
n".b(0)."$w.nn"}0..98

56. More Tech Talking
Points
Indentation enforces good programming style
can read other’s code, and not obfuscated
sub b{$n=99-@_-$_||No;"$n bottle"."s"x!!--$n." of beer"};$w=" on the
wall"; die map{b."$w,n".b.",nTake one down, pass it around,
n".b(0)."$w.nn"}0..98
No more forgotten braces and semi-colons! (less debug time)

57. More Tech Talking
Points
Indentation enforces good programming style
can read other’s code, and not obfuscated
sub b{$n=99-@_-$_||No;"$n bottle"."s"x!!--$n." of beer"};$w=" on the
wall"; die map{b."$w,n".b.",nTake one down, pass it around,
n".b(0)."$w.nn"}0..98
No more forgotten braces and semi-colons! (less debug time)
Safe - dynamic run time type checking and bounds checking on arrays

58. More Tech Talking
Points
Indentation enforces good programming style
can read other’s code, and not obfuscated
sub b{$n=99-@_-$_||No;"$n bottle"."s"x!!--$n." of beer"};$w=" on the
wall"; die map{b."$w,n".b.",nTake one down, pass it around,
n".b(0)."$w.nn"}0..98
No more forgotten braces and semi-colons! (less debug time)
Safe - dynamic run time type checking and bounds checking on arrays
Source
http://www.ariel.com.au/a/teaching-programming.html

60. Scripting and what else?

61. Scripting and what else?
Application GUI Programming

62. Scripting and what else?
Application GUI Programming
Gtk, Qt, Tk, WxWidgets, and MANY more...

63. Scripting and what else?
Application GUI Programming
Gtk, Qt, Tk, WxWidgets, and MANY more...
IronPython (.NET), Jython (Java)

64. Scripting and what else?
Application GUI Programming
Gtk, Qt, Tk, WxWidgets, and MANY more...
IronPython (.NET), Jython (Java)
Web Frameworks

65. Scripting and what else?
Application GUI Programming
Gtk, Qt, Tk, WxWidgets, and MANY more...
IronPython (.NET), Jython (Java)
Web Frameworks
Django, Pylons, TurboGears, Zope, ...

66. Scripting and what else?
Application GUI Programming
Gtk, Qt, Tk, WxWidgets, and MANY more...
IronPython (.NET), Jython (Java)
Web Frameworks
Django, Pylons, TurboGears, Zope, ...
Hardware

67. Scripting and what else?
Application GUI Programming
Gtk, Qt, Tk, WxWidgets, and MANY more...
IronPython (.NET), Jython (Java)
Web Frameworks
Django, Pylons, TurboGears, Zope, ...
Hardware
Arduino interface, pySerial

68. Is it really that perfect?

69. Is it really that perfect?
Interpreted language

70. Is it really that perfect?
Interpreted language
slight overhead

71. Is it really that perfect?
Interpreted language
slight overhead
dynamic typing

72. Is it really that perfect?
Interpreted language
slight overhead
dynamic typing
Complex systems (compute bound)

73. Is it really that perfect?
Interpreted language
slight overhead
dynamic typing
Complex systems (compute bound)
Limited systems

74. Is it really that perfect?
Interpreted language
slight overhead
dynamic typing
Complex systems (compute bound)
Limited systems
low level, limited memory on system

75. Who else uses it?

76. Who else uses it?

77. Who else uses it?

78. Who else uses it?

79. Who else uses it?

80. Who else uses it?

81. Who else uses it?

82. Who else uses it?

83. Who else uses it?

84. Who else uses it?