it's a just simple task of a flask that picks jpg format file from user & saves to the particular folder but it gives me this error:
jinja2.exceptions.UndefinedError: 'index' is undefined
this is my Flask Code:
import os from flask import Flask, render_template, request app = Flask(__name__) app_root = os.path.dirname(os.path.abspath(__file__)) @app.route("/") def index(): target = os.path.join(app_root, 'txt/') print(target) if not os.path.isdir(target): os.mkdir(target) for file in request.files.getlist("mp3_file"): print(file) file_name = file.filename destination = '/'.join([target, file_name]) print(destination) file.save(destination) return render_template('index.html') if __name__ == '__main__': app.run(debug=True) & this is my HTML Code(this code could have Bugs but right now flask showing error):
<!DOCTYPE html> <html lang="en"> <head> <meta charset="UTF-8"> <title>Title</title> <link rel="stylesheet" type="text/css" href="{{ url_for('static', filename = 'bootstrap.css') }}" /><!-- ../static/bootstrap.css --> </head> <body background="Bg.jpg"> <center> <form method="post" enctype="multipart/form-data" action="{{ url_for(index) }}"> <table class="table table-hover" style="width:100px; background-color:rgba(102,102,102,0.9); border-radius:10px; margin:100px"> <tr> <td class="text-right"><label class="text-white" style="margin-top:4%">Upload Your Audio file here: </label></td> <td><input name="mp3_file" type="file" value="" class="text-white btn" required></td> </tr> <tr> <td colspan="2"><input type="submit" name="submit_btn" value="Submit" class="btn btn-dark" style="margin-left:45%" /></td> </tr> <tr> <td colspan="2">{% if file %}<textarea name="answer" rows="10" cols="100" content="{{ file }}" ></textarea>{% else %} <textarea name="answer" rows="10" cols="100" ></textarea> {% endif %}</td> </tr> </table> </form> </center> </body> </html> 
action="{{ url_for(index) }}"Where isindexdefined?