Introduction to Python 3

How To Get This Code

If you are comfortable with git, just clone this repo.

Alternatively, click the green "Clone or download" button and select Download ZIP. Unzip the file to a directory that you can easily get to from your Terminal.

---

Workshop Prerequisites

• Some amount of programming in another language
• A text editor
• A shell environment (Terminal, etc.)
• Python 3.x (3.6 or higher preferred)
• Optional: the "JSON Formatter" extension for Chrome

Google-able Agenda

Google for these topics by prefixing them with "python", i.e. "python conditional statements"

1:30pm - 2:30pm

• Python Quick Start
  • Variables
  • Case sensitivity
  • Built-in types: int, str, float
  • User input
  • A word about quotation marks
  • Writing scripts
    • Printing to the screen
    • LAB: 1_quotes.py
• Collections
  • list
  • tuple
  • dict
  • range
• Logic (Typealong: 2_password.py)
  • Boolean logic: True, False, and, or, not
  • Conditional statements
  • Indentation
  • Loops
    • while
    • for
  • LAB: 3_planets.py
• Sequences
  • str, list, tuple
  • Slicing
• Defining functions
  • Return values
  • The special value None
  • The pass statement
  • Accepting parameters to functions
  • Keyword arguments
  • LAB: 4_solar_system.py
  • LAB: 5_sears_tower.py

2:30pm - 3:30pm

• Types and type conversions
• Strings
  • Immutability
  • f-Strings
  • Multiline strings
• File I/O
• Modules
  • Using modules with the import statement
  • from ... import ...
  • __main__

3:30pm - 4:30pm

• Intro to Unicode: 6_unicode.py
• Using JSON web services from Python
  • The json module
  • json.loads(str)
  • json.dumps(obj)
  • LAB: 7_astronauts
  • LAB: 8_geocoding
  • LAB: 9_divvy.py

Python Common Gotcha #1: Assignment Statements

• All assignments are references.
• Assignment operations never make a copy of the value being assigned.
• Multiple references to mutable objects (like lists) can lead to unexpected behavior.

Python Common Gotcha #2: SSL Certifications

If you get errors like ssl.SSLError: [SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed then the following two shell commands should install SSL certs for Python on your Mac:

$ pip3 install certifi

then: (this example is for 3.6)

$ /Applications/Python\ 3.6/Install\ Certificates.command