This document provides information about an introductory workshop on computer programming and Python. It includes topics like what programming is, programming languages and their expressive power, Python as the language that will be used, and assignments for students to complete including printing text, introducing themselves, iterating through lists, and working with data types and objects.

1. #GetConnected with
Jan Kroon
Hogeschool Rotterdam
Workshop 1

2. –Steve Jobs
"Computers are like a bicycle for our minds."
https://www.youtube.com/watch?v=ob_GX50Za6c

3. Computer Programming
• Programming: to build a machine that does your work
• Whenever you enter a search term in Google, you are
programming Google to search for you …
• but if you need to think about AND and/or OR and "grouping of
search terms" most people give up.
• A computer is a general purpose machine: a calculator,
a word processor, a drawing machine, a search
machine, a remember machine, an analytics machine, an information
machine, a communications machine, a game machine, a navigation machine, a music
machine, a video machine, a design machine …
• If you learn how to program you can build these (and
many other) machines!

4. Programming Languages
Expressive Power:
1 line of code in Python, Perl, R or Ruby
3 lines of code in C++, C# or Java
10 lines of code in C
50-100 lines of code in Machine Language or
Assembler

5. Python 3.4.0
In this workshop you will learn to write Python One Liners!

6. Guido van Rossum
Benevolent Dictator For Life

8. Object Oriëntation

9. 'Edwin Jansen' is a 'Plumber'
'Edwin Jansen' has properties:
• edwinJansen.phoneNumber
• edwinJansen.available
'Edwin Jansen' has skills to do things:
• edwinJansen.fixTap()
• edwinJansen.repairRoof()
>>> import plumber and let a
plumber do the work!
Object Class
Methods
(verbs)
Properties
(nouns)

10. Everything is an object!
• Whole Numbers: int
• Broken numbers: float
• Text: str
• User Interface Elements: Windows, Buttons,
Sliders, TextFields, ImageViews, MapViews.
• Containers: list, dict, tuple, …

11. Assignment 0
Install Python on your laptop (use Google to look
for Python / IDLE download)

12. IDLE Integrated
DeveLopment Environment

13. Programmer's Workbench

14. Console
"Python chat"
Editor
"Python email"
Run menu
Run Module
Syntax Colour
Code?

15. Happy Coding!
print("Hello World")
help()
help(print)
type("Hello World")
IDLE
dir()

16. Assignment 1
Write your first computer program, a classic:
>>> print("Hello World")

17. Assignment 2
Introduce yourself:
>>> myName = "…"
>>> print("Hello", myName)
New Object!

18. Assignment 3
Introduce your group:
>>> ourGroup = ["Komala Mazerant", …]
and say hello to everyone (except yourself!)

19. Iteration (Looping)
>>> for student in ourGroup:
print("Hello", student)

20. Condition (Skipping)
… == … means 'is equal to'
… != … means 'is not equal to'
>>> for student in ourGroup:
if student != myName:
print("Hello", student)

21. Assignment 4
Find out the class of the objects you created:
>>> type(…)
find out their size (length)
>>> len(…)
and find out what you can do with these objects
>>> dir(…)
and if you want detailed information use
>>> help(…)

22. Dynamic Typing
Try this:
>>> aNumber = 747
>>> aNumber + aNumber
>>> sameNumber = str(aNumber)
>>> sameNumber + sameNumber
>>> anotherNumber = int(sameNumber)
>>> anotherNumber + anotherNumber
What is going on here???

23. Juggle with types
Make a 'class list' object from a 'class string' object:
>>> aQuote = "Computers are like a bicycle for our
minds"
>>> quoteWords = aQuote.split()
and turn the words back into a sentence"
>>> aSentence = ""
>>> for word in quoteWords:
aSentence = aSentence + " " + word

24. Assignment 5
Copy the contents of theJungle in an object:
>>> theJungle = "…"
A. Is there a lion in the jungle?
B. Where do you encounter the first tiger?
C. How many trees in the jungle?

25. Selection (Slicing)
>>> aStudent = ourGroup[1]
>>> someStudents = ourGroup[2:5]
>>> lastStudent = ourGroup[-1]

26. Assignment 6
Find palindromes in 'words' list:
>>> words = […]

27. Big Data

28. Assignment 7
Browse to: https://twitter.com/search-advanced
A. How many tweets today in Rotterdam?
B. Any tweets with tag #GetConnected?
C. What is last tweet from @BarackObama
D. More positive or more negative tweets last week
about @BarackObama?

29. Analytics
1. Collect Data
2. Clean Data
3. Wrangle, Merge, Aggregate
4. Visualize, Summarize Data
5. Interpret, Develop Insights
6. Act!

30. Collect Data
>>> from urllib import request
>>> twitterHandle = request.urlopen("http://
twitter.com")
>>> twitterData = twitterHandle.read()
>>> twitterText = str(twitterData)
>>> twitterText[0:500]
>>> len(twitterText)

31. Assignment 8
Copy the contents of aBusinessCard and someBusinessCards in
two objects:
>>> aBusinessCard = […]
>>> someBusinessCards = […]
A. How can you recognize a phone number or an email address in
aBusinessCard
B. Print a list of names extracted from someBusinessCards
C. Print a list of email addresses extracted from someBusinessCards

32. Assignment 9
Copy the contents of tweets in an object:
>>> tweets = […]
A. How many tweets?
B. How many from Rotterdam?
C. Who has sent tweets with hashtag
#GetConnected?

33. Assignment 10
Copy the contents of twitterFollowers in an object:
>>> tf = "…"
A. Is there overlap in the followers of
@KomalaDubois and @jankroon?
B. What would be the possibilities if you would
know all followers of all people on Twitter?

34. Algorithms
• Dictionary attack to break password protection
• Harvesting email addresses for spamming
• Recommendations: "People who rented this movie
also rented …"
• Segmentation: clustering people that are similar in
some respect
• Outlier detection: discover exceptional behavior, i.e.
to prevent credit card fraud

35. Visualize Data
Our eyes are extremely good at finding patterns
• Mathematical Graphs
• Statistical Diagrams
• Maps
• Timelines
• Network Graphs

36. Ice Bucket Challenge
https://srogers.cartodb.com/viz/89e638ac-2a2c-11e4-9cb7-0e73339ffa50/embed_map

37. 10.000 hours of practice
Malcom Gladwell states in his book 'Outliers' that
you need to practice for at least 10.000 hours in
order to master a specific skill.
8 hours/day * 7 days/week * 52 weeks/year * 3,5 year =
10192 uur
0,1%

38. Backup Slides

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