sandbox.py

from flask import Flask, abort, request
import json
import subprocess
import hashlib
import os

app = Flask(__name__)

@app.route("/submit", methods=["POST"])
def submit():
    if not request.json: abort(400)
    code = request.json["code"]
    filename = hashlib.sha1(code.encode()).hexdigest() + ".py"
    with open(os.path.join("tmp", filename), 'w') as f:
        f.write(code)

    result = subprocess.run("docker run -it --rm --name running-script -v \"$PWD\"/tmp:/test python:slim python /test/{}".format(filename), stdout=subprocess.PIPE, shell=True)
    return json.dumps({"result": result.stdout.decode("utf-8").strip()})

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