echo-server.py

from flask import Flask
from flask import request
import sys

app = Flask(__name__)
port = sys.argv[1];

@app.route("/")
def home():
    msg = request.args.get('msg')
    print msg
    return msg

if __name__ == "__main__":
    app.run(host='127.0.0.1', port=int(port))

install.sh

pip install Flask