Why Learn Python?
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A intro to the Python programming language and why you should use it, with comparisons and applications of use.
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-35-320.jpg)
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-36-320.jpg)
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-37-320.jpg)
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-38-320.jpg)
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-39-320.jpg)
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-40-320.jpg)
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-42-320.jpg)
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-43-320.jpg)
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-44-320.jpg)
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-45-320.jpg)
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-46-320.jpg)
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-47-320.jpg)
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-48-320.jpg)
![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](https://image.slidesharecdn.com/why-python-110702150011-phpapp01/85/Why-Learn-Python-49-320.jpg)
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Why Learn Python?
- 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
- 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?
Editor's Notes
- #2: \n
- #3: \n
- #4: \n
- #5: \n
- #6: \n
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