Python

1. Python
Lightweight Language for Data Science

2. Overview
(Academic, Finance)
Guido van Rossum:
Used in:
Dropbox
Data Science:
Django
“As previously at Google, I have a
deal where I can spend up to 50%
of my time on Python.”

3. Language Design
Duck Typing
Graph (Panda/Seaboard)
Data Frame
Generator
Dynamic name resolution (late binding)
Interpretor OOP / AOP
Dynamic & Strongly typed (Swift/Go/Scala) :
C, Java (Static & Strongly typed)
Ruby, JS (Dynamic & Weekly typed)
TypeScript (Static & Weekly typed)

4. Hello Worlds
HelloWorld HelloWorld - func
HelloWorld - format

5. List & Dictionary
List and Dictionary
List can contain
different types

6. Tuple & Set
Tuples are immutable, have semantics, and can be used in a key in a
dictionary.
What are tuples good for?

7. Higher-Order Function
A high-order function refers to a function that takes function(s) as arguments.
e.g.) Ajax, event listener, interceptor, map, filter, decorator, template method
f ( f ’(x)) Lambda Equations

8. List Comprehension
Returns a List based on a List
[0, 1, 2, 3, 4] -> [0, 1, 4, 9, 16]
map is a high-order function

9. Generator
Generators let you generates an iterator with yield
yield

10. OOP
__init__
constructor
self
this

11. Dynamic Name Resolution
Add a new method
get_full_name()
late binding
Change it.

12. cont. Dynamic Name Resolution
With a high-order function & closure, you can decorate/
intercept an existing function.
Decoration

13. Duck Typing
Runtime error
No type checking on you

14. Pandas Seaborn
http://stanford.edu/~mwaskom/software/seaborn/#