Python Upload and Download file using Flask Web development Not Working

[Shalini Ravishankar]

Hello Everyone,

I am new to Python Web development. I am creating a Web Page with FLask. The Pages takes input as file (file upload) and the process the file and gives the output as a file(downloading the file)

But I am having error.

My Python file :

from flask import Flask
from flask import render_template
from flask import request, send_from_directory
from werkzeug import secure_filename
import os
import commandFile

app = Flask(__name__)




UPLOAD_FOLDER = 'F:/uploads/'
ALLOWED_EXTENSIONS = set(['txt'])

@app.route('/')
@app.route('/home')
def home_page():
    return render_template('home.html')


@app.route('/process',  methods=['GET', 'POST'])
def process_page():
    if request.method == 'POST':
        tool_selected = request.form['tool_list']
        print tool_selected
        # Get the name of the uploaded file
        file = request.files['fileToupload']
        filename = secure_filename(file.filename)
        file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))
        input_file = UPLOAD_FOLDER + filename
        print input_file
        return render_template('process.html', input_file = input_file, tool_selected =tool_selected  )



The Form in home.html :

<form action="process" method="post" enctype="multipart/form-data">
            <div class="row">


                <div class="col-md-4">
                    <p>
                        Input File
                    </p></div>
                <div class="col-md-8"><input name ='fileToupload' type="file" style="font-family: Baskerville, 'Palatino Linotype', Palatino, 'Century Schoolbook L', 'Times New Roman', serif;
	font-size:20pt; font-style:bold" required>
                </div>
            </div>
           </form>


Action process.html :



<div class="container">
    <div class="box">

        <p id = "part1">You File has been Uploaded.
            Please wait ... Your file is being processed. </p>

        <% import commandFile
        processing = commandFile.Command_Process(tool_selected, input_file) %>
        processing.processFile() %>

<script>
document.getElementById("part1").innerHTML = "You File is Processed. Download will begin Automatically";
</script>





    </div>
</div>


But the output is 

You File is Processed. Download will begin Automatically

<% import commandFile processing = commandFile.Command_Process(tool_selected, input_file) %> processing.processFile() %>


The python script is not executing, it is displaying in html. 

Can some one tell me how do I do thid.