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This is a starting point for Python solutions to the "Build Your Own Redis" Challenge.

In this challenge, you'll build a toy Redis clone that's capable of handling basic commands like PING, SET and GET. Along the way we'll learn about event loops, the Redis protocol and more.

Note: If you're viewing this repo on GitHub, head over to codecrafters.io to try the challenge.

Passing the first stage

The entry point for your Redis implementation is in app/main.py. Study and uncomment the relevant code, and push your changes to pass the first stage:

git add .
git commit -m "pass 1st stage" # any msg
git push origin master

That's all!

Stage 2 & beyond

Note: This section is for stages 2 and beyond.

  1. Ensure you have python (3.x) installed locally
  2. Run ./spawn_redis_server.sh to run your Redis server, which is implemented in app/main.py.
  3. Commit your changes and run git push origin master to submit your solution to CodeCrafters. Test output will be streamed to your terminal.

Troubleshooting

module socket has no attribute create_server

When running your server locally, you might see an error like this:

Traceback (most recent call last):
  File "/.../python3.7/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/.../python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/app/app/main.py", line 11, in <module>
    main()
  File "/app/app/main.py", line 6, in main
    s = socket.create_server(("localhost", 6379), reuse_port=True)
AttributeError: module 'socket' has no attribute 'create_server'

This is because socket.create_server was introduced in Python 3.8, and you might be running an older version.

You can fix this by installing Python 3.8 locally and using that.

If you'd like to use a different version of Python, change the language_pack value in codecrafters.yml.

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