1. Getting Started with PowerShell Jump Start
Susan Ibach | Technical Evangelist
Christopher Harrison | Content Developer

2. Meet Susan Ibach| ‏@hockeygeekgirl
Technical Evangelist
Helping developers understand Visual Studio, app building
Microsoft Certified Trainer
My first program was written in basic on a computer with 64K of memory
Will not admit how many years coding experience
Basic, Fortran, COBOL, VB, C#, HTML, Python
Frequent blogger and presenter
marathoner, wife, and mother of two awesome boys!

3. Meet Christopher Harrison | ‏@geektrainer
Content Developer
Focused on ASP.NET and Office 365 development
Microsoft Certified Trainer
Still misses his Commodore 64
Long time geek
Regular presenter at TechEd
Periodic blogger
Certification advocate
Marathoner, husband, father of one four legged child

4. Course Topics Getting Started with PowerShell
01 | Flask application design
04 | Python to databases
02 | Object oriented programming
05 | Jinja layouts
03 | Introduction to databases
06 | Introduction to Bootstrap

5. Setting Expectations Target Audience
New Python developers looking to take the "next step"
Burgeoning web developers
Some Python experience
Suggested Prerequisites/Supporting Material
Introduction to Programming with Python MVA

6. Join the MVA Community! Microsoft Virtual Academy
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Up-to-date, relevant training on variety of Microsoft products
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Enter this code: SQLPythonFlask (Exp: 4/6/2015)

7. 01 | Flask Design Susan Ibach | Senior Technical Evangelist
Christopher Harrison | Content Developer

8. Flask is a unique platform...
It provides a way to create web applications...
Without forcing you into a structure

9. When your application grows, things can get messy
Code duplication
Spaghetti code
Debugging issues
Performance issues

10. Flask Design
Design concepts
Packages

11. Design concepts

12. I find it immensely helpful to work on the assumption that I am too stupid to get things right. This leads me to conservatively use what has already been shown to work, to cautiously test out new ideas before committing to them, and above all to prize simplicity.
    - Jonathan Edwards

13. When doing design... Keep it simple! Use what's already there
Don't be afraid of using an existing framework
Don't let pride get in the way of using someone else's code
Make changes as needed
Design with change in mind, because there will always be changes

14. Core concepts Write once, use everywhere Use layers Use patterns
Copy/paste is bad
Even if it's just two lines of code
Especially if it's a string that could change like a server name
Use layers
Each layer has a job
Data access layer is responsible for getting data from a database
Business logic layer is responsible for enforcing rules
Use patterns

15. What's a pattern? A pattern is a recipe to be used to solve a problem
Recipes do not need to be followed exactly
Substitutions are made based on allergies, ingredients on hand, personal preferences, etc.
Use what fits, and modify where it doesn't

16. Introducing Model, View, Controller (MVC)
MVC is a pattern
Three basic parts
Model, which is your data
View, which is what the user will see
Controller, which takes the user request and gets the job done

17. Models, Views, and Controllers
01: Exploring ASP.NET MVC 4
What does MVC look like?
Request
Controller
Retrieves Model
“Does Stuff” 
user 
Model
Response
View
Visually represents
the model 

18. How about an analogy? Think about being at a restaurant
Your server is the controller
He's responsible for taking your order, going back to the kitchen to get your order, and delivering it
The food is the model
That's what you're trying to get
The plate and other accoutrements are the view
It's all about the presentation

19. How does this apply to Flask?

20. Packages

21. What is a package? A packaged block of code Folders and modules
Folders become containers
The modules are inside of folders

22. Why use packages? We can't keep adding code to a single file
We can't keep adding files to a single folder

23. Different packages for different portions of your application
admin
data
dataaccess.py
models
user.py
permission.py
quiz
data
dataaccess.py
models
question.py
category.py

24. How do you create a package?
A package at the end of the day is a folder
The folder can contain py files and other folders
Each folder must contain a file called __init__.py
That is two underscores on each side
It's a keyword, just go with it
It's the first file that will be called
Use it to initialize the environment, import files, etc.

25. How do you reference items in a package?
Use dotted notation
Method inside server.py?
admin.data.server.method()
Method inside question.py?
quiz.models.question.method()
admin
data
server.py
models
user.py
permission.py
quiz
data
dataaccess.py
models
question.py
category.py

26. Adding packages to our application