How to write script in python?

Question

Python

Hello everyone, how to rewrite Flask Python 2.7 code on SimpleHttServer? the fact is that we need the capabilities of python 3, and I can’t install a flask with python 3 due to problems with the OS, which would make it easier to rewrite on a simple server with python 3 support. Here is the source code

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from flask import Flask, render_template, request

app = Flask(__name__)
app.config.from_object(__name__)


@app.route('/')
def welcome():
    return render_template('form.html')


@app.route('/result', methods=['POST'])
def result():
    var_1 = request.form.get("var_1", type=int)
    var_2 = request.form.get("var_2", type=int)
    operation = request.form.get("operation")
    operation2 = request.form.get("operation2")
    operation3 = request.form.get("operation3")
    if(operation == u'Q (теплота в Дж)' and operation2 == u"q (Электрический заряд в Кл)" and operation3 == u"C (емкость в фарад)"):
        result = var_1**2 / 2*var_2
else:
        result = 'INVALID CHOICE'
    entry = result
    return render_template('result.html', entry=entry)

if __name__ == '__main__':
    app.run(debug=True)

here is an example of a simple server under which you need to rewrite

from http.server import HTTPServer, BaseHTTPRequestHandler


class Serv(BaseHTTPRequestHandler):

    def do_GET(self):
        if self.path == '/':
            self.path = '/index.html'
        try:
            file_to_open = open(self.path[1:]).read()
            self.send_response(200)
        except:
            file_to_open = "File not found"
            self.send_response(404)
        self.end_headers()
        self.wfile.write(bytes(file_to_open, 'utf-8'))


httpd = HTTPServer(('localhost', 8080), Serv)
httpd.serve_forever()

Answer 1

Here is an example code on the knee, it displays the sum of two numbers, but it can break at any time:

oops

#!/usr/bin/env python3
from http.server import BaseHTTPRequestHandler, HTTPServer
import re


class MyHandler(BaseHTTPRequestHandler):
    def _set_response(self):
        self.send_response(200)
        self.send_header('Content-type', 'text/html')
        self.end_headers()

    def do_GET(self):
        self._set_response()
        self.wfile.write(bytes("""
        <form action="/" method="post">
          Val1:<br>
          <input type="text" name="val1" value="1">
          <br>
          Val2:<br>
          <input type="text" name="val2" value="2">
          <br><br>
          <input type="submit" value="Submit">
        </form>
        """, "utf-8"))

    def do_POST(self):
        content_length = int(self.headers['Content-Length'])
        post_data = self.rfile.read(content_length)
        post_data = re.split("&", post_data.decode("utf-8"))
        val1 = int(re.split("=", post_data[0])[1])
        val2 = int(re.split("=", post_data[1])[1])
        self._set_response()
        self.wfile.write(bytes("%s" % (val1 + val2), "utf-8"))


def run(server_class=HTTPServer, handler_class=MyHandler, port=8080):
    server_address = ('', port)
    httpd = server_class(server_address, handler_class)
    print('Starting httpd...')
    httpd.serve_forever()


if __name__ == "__main__":
    run()

It seems to me easier to fix the server, or create an environment and put the necessary package there, if there are any problems with dependencies, etc. Well, or use something else if the flask does not start, which is very strange, for example, a tornado

if "it's easier to rewrite", then why the question is how? )) It's easy, do it.
In general, I advise you to shove the whole thing into Docker.

Answer 2

if "it's easier to rewrite", then why the question is how? )) It's easy, do it.
In general, I advise you to shove the whole thing into Docker.