Introduction to python programming and NLTK

1. delightful python

2. dipping your toe into
python
what is python?

3. what is python?
• general purpose
• open source
• object oriented and functional
• interpreted and interactive
• cross-platform
• portable
• sociable and outgoing

4. dipping your toe into
python
what makes python great?

5. what makes python great?
➡lucidity
★
clear to read and write
★
concise without being cryptic
★
clean code

6. C
#include<stdio.h>
int main()
{
printf("Hello World!n");
return 0;
};
63 characters and 6 lines!
}

7. C++
#include<iostream>
using namespace std;
int main()
{
cout<< "Hello World!n";
return 0;
}
comes in at around 81 characters and 7 lines!

8. Java
import java.io.*;
public class Helloworld
{
public static void main(String[] args)
{
System.out.println("Hello World!");
}
}
comes in at a hefty 115 characters and 8 lines!

9. Python
print("Hello World")
Comes in at a measly 20 characters
and 1 line

10. what makes python great?
➡comes batteries-included!
★
has comprehensive support for
routine acts in the form of modules
★
pythonic principle-don’t reinvent the
wheel

11. what makes python great?
➡incredible support
★
lots and lots of documentation
★
better yet! you have the interpreter,
the magic word being help(name)
★
in python, you have an ever-present
help!

12. what makes python great?
➡fantastic datatypes and dynamically typed
★
list
★
tuple
★
set
★
dictionary
★
string, int, float

13. datatype example
•
•
roll={10583: "Pratheek"}
•
•
•
•
name= "Pratheek Adidela"
sportplayed={badminton, tennis, badminton,
cricket, tennis, cricket}
phone=8091340241
Student=(name, roll, phone, sportplayed)
AllStudents is a list of tuples, each of which
consists of a string, dictionary, integer and set

14. let’s dig into the delicious
realm of string parsing
NLTK

15. what’s the catch?

16. what’s the catch?
• how can python be so easy and so great?
there needs to be some catch, right?
SPEED
slower than C, but comparable to Java

17. what if i wanted the
brevity of python with
the swiftness of C?

18. what if i wanted the
brevity of python with
the swiftness of C?
YES!

19. who exactly uses
python?

20. questions!?!?

21. pythonthanks!
is awesome!
thanks!