# 2: Parts of Python
## Expectations
We're going to take a tour of Python. You are expected to know generally *what* these things are, you're not yet expected to know *how* to use them. So no freaking out. We'll play around with some fun projects after a quick look around.
### Learning Targets
* I can make a hello world app in Python.
* I can differentiate between compile-time, run-time, and logic errors.
* I can describe the basic constructs of programming languages such as variables, conditionals, loops, and flow control.
### Assessments
* You will be answering comprehension questions about the layers supporting software execution.
* You will be creating and submitting your several small Python apps using trinket.io
Let's go to trinket.io and build some simple stuff, starting with `print("Hello, world")`
We'll go over each of these concepts in greater detail. For now, let's skim over all the big topics.
## Class Videos
The first video deals with the following concepts: **Functions, Variables, Operators and Conditionals**
**Class 1/4**
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Python Material, Class 1
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**Class 1/11**
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Python Material, Class 2
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**Class 1 / 20: User defined functions**
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**class 1/24: for / while loops**
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## Key Concepts
### Data Types
The first thing we'll tinker with is **declaring** variables and storing information. Variables in Python are **dynamically typed**, meaning you can store one type of information in a variable and then switch it without any fuss. Other languages are more strict and don't allow such shenanigans.
### Operators
We use math symbols for most common operations. But Python has some cool operators. Read!
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### Conditionals
Conditionals control how the program flows based on input from the user (in an app) or sensors (on a robot.
