app.py

from flask import Flask, render_template, redirect, request

import Caption_it1

app=Flask(__name__)

@app.route('/')
def hello():
    return render_template('index.html')

@app.route('/',methods=['POST'])
def marks():
    if request.method=='POST':
        f=request.files['userfile']
        path='static/{}'.format(f.filename)
        f.save(path)

        caption=Caption_it1.caption_this_image(path)

        result_dic={
            'image':path,
            'caption':caption
        }

    return render_template('index.html',your_result=result_dic)

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