Python PPT

Python for Big Data Analytics
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View Complete Course at : www.edureka.in/python
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Objectives of this Session
• Un
• Why Python?
• Web Scrapping example using Python
• Pydoop : Python API for Hadoop
• Word Count example in Pydoop
• Data Science with Python
• Zombie Invasion modeling using Python
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Why Python?
 Python is a great language for the beginner programmers since it is easy-to-
learn and easy-to-maintain
 Python’s biggest strength is that bulk of it’s library is portable. It also
supports GUI Programming and can be used to create Applications portable on
Mac, Windows and Unix X-Windows system
 With libraries like PyDoop and SciPy, it’s a dream come true for Big Data
Analytics
Post your Questions on Twitter on @edurekaIN: #askEdureka www.edureka.in/python

Growing Interest in Python

Demo: Web Scraping using Python
 This example demonstrates how to scrape basic financial data from
https://www.google.com/finance website from a given list of Companies.
 We shall use open source web scraping framework for Python called
Beautiful Soup to crawl and extract data from webpages.
 Scraping is used for a wide range of purposes, from data mining to
monitoring and automated testing.

Demo: Collecting Tweets using Python
 This example demonstrates how to extract historical tweets for a particular
brand like “nike” or “apple”
 We shall make a REST API call to twitter to extract tweets.
 This data can be further used to perform sentiment analysis for a particular
brand on Twitter.

Big Data
 Lots of Data (Terabytes or Petabytes)
 Big data is the term for a collection of data sets
so large and complex that it becomes difficult to
process using on-hand database management
tools or traditional data processing applications.
 The challenges include capture, curation,
storage, search, sharing, transfer, analysis, and
visualization.
cloud
tools
statistics
No SQL
compression
storage
support
database
analize
information
terabytes
processing
mobile
Big Data

Un-Structured Data is Exploding

Big Data Scenarios : Hospital Care
Hospitals are analyzing medical data and patient
records to predict those patients that are likely to seek
readmission within a few months of discharge. The
hospital can then intervene in hopes of preventing
another costly hospital stay.
Medical diagnostics company analyzes millions of lines
of data to develop first non-intrusive test for
predicting coronary artery disease. To do so,
researchers at the company analyzed over 100 million
gene samples to ultimately identify the 23 primary
predictive genes for coronary artery disease

http://wp.streetwise.co/wp-content/uploads/2012/08/Amazon-Recommendations.png
Amazon has an unrivalled bank of data on online consumer
purchasing behaviour that it can mine from its 152
million customer accounts.
Amazon also uses Big Data to monitor, track and secure its 1.5
billion items in its retail store that are laying around it 200
fulfilment centres around the world. Amazon stores the
product catalogue data in S3.
S3 can write, read and delete objects up to 5 TB of data each.
The catalogue stored in S3 receives more than 50 million
updates a week and every 30 minutes all data received is
crunched and reported back to the different warehouses and
the website.
Big Data Scenarios : Amazon.com

http://smhttp.23575.nexcesscdn.net/80ABE1/sbmedia/blog/wp-content/uploads/2013/03/netflix-in-asia.png
Netflix uses 1 petabyte to store the videos for streaming.
BitTorrent Sync has transferred over 30 petabytes of data
since its pre-alpha release in January 2013.
The 2009 movie Avatar is reported to have taken over 1
petabyte of local storage at Weta Digital for the rendering
of the 3D CGI effects.
One petabyte of average MP3-encoded songs (for mobile,
roughly one megabyte per minute), would require 2000
years to play.
Big Data Scenarios: NetFlix

 IBM’s Definition – Big Data Characteristics
http://www-01.ibm.com/software/data/bigdata/
Web
logs
Images
Videos
Audios
Sensor
Data
Volume Velocity Variety
IBM’s Definition

Hadoop for Big Data
 Apache Hadoop is a framework that allows for the distributed processing of large data sets across
clusters of commodity computers using a simple programming model.
 It is an Open-source Data Management with scale-out storage & distributed processing.

Hadoop and MapReduce
Hadoop is a system for large scale data processing.
It has two main components:
 HDFS – Hadoop Distributed File System (Storage)
 Distributed across “nodes”
 Natively redundant
 NameNode tracks locations.
 MapReduce (Processing)
 Splits a task across processors
 “near” the data & assembles results
 Self-Healing, High Bandwidth
 Clustered storage
 Job Tracker manages the Task Trackers
Map-Reduce
Key Value

PyDoop – Hadoop with Python
 PyDoop package provides a Python API for Hadoop MapReduce and
HDFS
 PyDoop has several advantages over Hadoop’s built-in solutions for
Python programming, i.e., Hadoop Streaming and Jython.
 One of the biggest advantage of PyDoop is it’s HDFS API. This
allows you to connect to an HDFS installation, read and write files, and
get information on files, directories and global file system properties.
 The MapReduce API of PyDoop allows you to solve many complex
problems with minimal programming efforts. Advance MapReduce
concepts such as ‘Counters’ and ‘Record Readers’ can be
implemented in Python using PyDoop.
Python can be used to write Hadoop MapReduce programs and
applications to access HDFS API for Hadoop with PyDoop
package.

Demo: Word Count using Hadoop Streaming API
 The example shows the simple word count application written in Python.
 We shall use Hadoop Streaming APIs to run mapreduce code written in Python.
 Word Count application can be used to index text documents/files for a given “search query”.

Python and Data Science
 Python is an excellent choice for Data Scientist to do his
day-to-day activities as it provides libraries to do all these
things.
 Python has a diverse range of open source libraries for
just about everything that a Data Scientist does in his
day-to-day work.
 Python and most of its libraries are both open source
and free.
The day-to-day tasks of a data scientist involves many
interrelated but different activities such as accessing and
manipulating data, computing statistics and , creating visual
reports on that data, building predictive and explanatory
models, evaluating these models on additional data, integrating
models into production systems, etc.

SciPy.org
SciPy (pronounced “Sigh Pie”) is a Python-based ecosystem of open-source software for mathematics,
science, and engineering.

Demo: Zombie Invasion Model
This is a lighthearted example, a system of ODEs(Ordinary differential equations) can be used to model a "zombie
invasion", using the equations specified by Philip Munz.
The system is given as:
dS/dt = P - B*S*Z - d*S
dZ/dt = B*S*Z + G*R - A*S*Z
dR/dt = d*S + A*S*Z - G*R
There are three scenarios given in the program to show how Zombie Apocalypse vary with different initial
conditions.
This involves solving a system of first order ODEs given by: dy/dt = f(y, t) Where y = [S, Z, R].
Where:
S: the number of susceptible victims
Z: the number of zombies
R: the number of people "killed”
P: the population birth rate
d: the chance of a natural death
B: the chance the "zombie disease" is transmitted (an alive person becomes a zombie)
G: the chance a dead person is resurrected into a zombie
A: the chance a zombie is totally destroyed

Questions?
Complete Course curriculum at : www.edureka.in/python
Post your Questions on Twitter on @edurekaIN: #askEdureka

Python PPT

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