A Python script that uses Nix to automatically bootstrap dependencies.

nix_and_python.py

#! /usr/bin/env nix-shell
#! nix-shell -i python -p python27Packages.flask python27Packages.emoji
#
# This is a demo of using Nix to manage packages for a program in a language agnostic way.
# If you run this example as an executable, it'll Just Work, even if you don't have Flask or emoji installed. Try it out!
#
# $ curl https://nixos.org/nix/install | sh
# $ chmod a+x nix_and_python.py
# $ ./nix_and_python.py
from flask import Flask
import emoji

app = Flask(__name__)


@app.route("/")
def hello():
    return emoji.emojize('Python and Nix is :thumbs_up_sign:')

if __name__ == "__main__":
    app.run()