from flask import Flask

UPLOAD_FOLDER = 'C:/uploads'

app = Flask(__name__)

app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER

app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024

import os

import urllib.request

from app import app

from flask import Flask, request, redirect, jsonify

from werkzeug.utils import secure_filename

ALLOWED_EXTENSIONS = set(['txt', 'pdf', 'png', 'jpg', 'jpeg', 'gif'])

def allowed_file(filename):

return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS

def upload_file():

# check if the post request has the file part

if 'files[]' not in request.files:

resp = jsonify({'message' : 'No file part in the request'})

resp.status_code = 400

return resp

files = request.files.getlist('files[]')

errors = {}

success = False

for file in files:

if file and allowed_file(file.filename):

filename = secure_filename(file.filename)

file.save(os.path.join(app.config['UPLOAD_FOLDER'], filename))

success = True

else:

errors[file.filename] = 'File type is not allowed'

if success and errors:

errors['message'] = 'File(s) successfully uploaded'

resp = jsonify(errors)

resp.status_code = 206

return resp

if success:

resp = jsonify({'message' : 'Files successfully uploaded'})

resp.status_code = 201

return resp

else:

resp = jsonify(errors)

resp.status_code = 400

return resp

if __name__ == "__main__":

app.run()

You can read tutorial https://www.roytuts.com/python-flask-rest-api-multiple-files-upload/