Python-сообщество

 import os
from flask import Flask, request
from werkzeug.exceptions import BadRequest
app = Flask(__name__)
BASE_DIR = os.path.dirname(os.path.abspath(__file__))
DATA_DIR = os.path.join(BASE_DIR, "data")
def build_query(it, teg, znachenie):
    res = map(lambda v: v.strip(), it)
    if teg == "filter":
        res = filter(lambda v, txt=znachenie: txt in v, res)
    if teg == "map":
        arg = int(znachenie)
        res = map(lambda v, idx=arg: v.split(" ")[idx], res)
    if teg == "unique":
        res = set(res)
    if teg == "sort":
        reverse = znachenie == "desc"
        res = sorted(res, reverse=reverse)
    if teg == "limit":
        arg = int(znachenie)
        res = list(res)[:arg]
    return res
@app.route("/perform_query")
def perform_query():
    try:
        teg1 = request.args["teg1"]
        teg2 = request.args["teg2"]
        znachenie1 = request.args["znachenie1"]
        znachenie2 = request.args["znachenie2"]
        file_name = request.args["file_name"]
    except KeyError:
        raise BadRequest
    file_path = os.path.join(DATA_DIR, file_name)
    if not os.path.exists(file_path):
        return BadRequest(description=f"{file_name} was not found")
    with open(file_path) as last:
        res = build_query(last, teg1, znachenie1)
        res = build_query(res, teg2, znachenie2)
        content = '\n'.join(res)
        print(content)
    return app.response_class(content, content_type="text/plain")
if __name__ == '__main__':
    app.run(debug=True)