Overview

A collection of random Python solutions. If anything helps you here please give this repo a star.

See commentary and other material on the Think Create Repeat YouTube Channel

General Setup

It's recommended that you use a virtual environment to run each group of scripts. Each folder has its own requirements.txt file. the process for setting up your environment look like

• Move to the topic folder
  • cd <topic_folder>
• Create a virtual environment
  • On Mac: python3 -m venv .venv
  • On Windows: python -m venv .venv
• Activate the virtual environment
  • On Mac: source .venv/bin/activate
  • On Windows: .venv\Scripts\activate
• Install dependencies
  • On Mac: pip3 install -r requirements.txt
  • On Windows: pip install -r requirements.txt
• Call a specific script
  • On Mac: python3 <script_name>.py
  • On Windows: python <script_name>.py
• Deactivate virtual environment
  • deactivate

See this video for additional commentary on Python Dev Environment Setup

Testing

• Create a virtual environment
  • On Mac: python3 -m venv .venv
  • On Windows: python -m venv .venv
• *Activate the virtual environment
  • On Mac: source .venv/bin/activate
  • On Windows: .venv\Scripts\activate
• Install dependencies
  • On Mac: pip install -r requirements.txt
  • On Windows: pip install -r requirements.txt
• Run tests
  • pytest -rA

Topics

Here's what you can find here:

Algorithms

• Binary search an efficient search within sorted lists
• Binary search tree a specially organized binary tree that allows divide and conquer searches
• Hamming distance Number of positions in which symbols differ for two equal length strings
• Inorder tree traversal Traverse a binary search tree inorder to list nodes in sorted ascending order
• Merge sort an efficient way to sort a list
• Reverse inorder tree traversal Traverse a binary search tree in reverse inorder to list nodes in sorted descending order

AWS

• DynamoDB fully managed NoSQL database service
  • Create tables
  • List tables
  • Put items
  • Scan items

Azure

• Blob storage ubiqutous file storage on Azure
  • Create container
  • List containers
  • Upload blob
  • List blobs
  • Download blob
• Key vault secret storage and crypto operations on Azure
  • Set secret
  • Get secret

Data Science

• Load CSV into a pandas dataframe
• Group data and then find statistics for each group

Databases

• Neo4j
  • Run a simple query against Neo4j

Games

• Boards
  • 2D grid A simple representation of a 2D grid board that can be used for games like tic-tac-toe or checkers
  • Tic-tac-toe board A board based on a 2D Grid that is specialized for the rules of tic-tac-toe
• Cards
  • Card deck A collection of cards that can be shuffled and dealt
  • Card deck factory A simplified way to construct various types of card decks
  • Playing card A representation of a standard playing card
• Clients
  • Tic-tac-toe client Play tic-tac-toe using a simple command line client
• Other
  • Rubiks Cube Simulator Simulate moves on a 2x2 Rubik's cube

Interview Questions

• Fizz buzz A test that makes sure you can apply simple rules and cover all cases
  • Fizz buzz video tutorial
• Largest common prefix Consider what it means to have a common prefix and carfully enumerate the collection and individual characters of each word
• Reverse linked list Reason about interactions with a data structure and carefully manipulate how the data is organized
• Reverse string Understand how to split and join on delimiters
• Swap numbers Write a few cryptic calculations to placate an interviewer trying to trick you
• Two sum Simplify the problem space to find two numbers in a list that add up to a given number
• Valid parens Check for valid brackets sequences by tracking nesting using a stack

Math

• Break even graph Visualize where sales break even with costs
• Multiply matrices Solve a system of linear equations using matrices
• Pie chart Use a math plotting library to create a pie chart and save it to a file
• Plot Vectors Use a math plotting library to plot and annotate vectors

PDF

• Extract images from a pdf Use pyMuPDF to extract imges from all pages
• Extract metadata from a pdf Use pyMuPDF to extract metadata from all pages
• Extract pages from a pdf Use pyMuPDF to extract all pages and render the contents as an image
• Extract text from a pdf Use pyMuPDF to extract text from all pages

Standard Library

• Base64 encode and decode A way to represent binary information using plain text
• JSON encode and decode A way to share data structures across languages and systems
• Process command line arguments Parse command line arguments using argparse
• Universally Unique ID A standards based mechanism for generating unique ids
• Working with dates Different ways to work with dates

Video

• Extract frames from a video Use OpenCV to extract frames from a video
• Combine images into a video Use OpenCV to combine images into a video file
• List video properties Use OpenCV to list properties such as frame rate, width, height and total frames

Web

• Flask
  • File uploads A reference for uploading a file and saving it to a random name
  • HTTP methods A compact reference for using common HTTP methods such as GET, POST, PATCH and DELETE
    • HTTP methods video tutorial
  • SQL database CRUD operations with a database over a REST API
• Django
  • Coming soon!

Support

• How do I request a change?
  • Please submit an issue or a pull request
• How fast will my request be added?
  • Probably not very fast for requests outside of a support package because this repo is maintained by a working professional
  • If you require fast, predictable responses, please purchase a support package
• Can support packages be purchased?
  • Yes, various support packages can be purchased and customized for your needs. Support areas available include:
  • On demand support videos
  • 1:1 and team coaching
  • New features and other modifications

License

Licensed under

• MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)