Uploading multiple files with Flask

@app.route('/upload', methods=['GET','POST'])
def upload():
    if flask.request.method == "POST":
        files = flask.request.files.getlist("file")
        for file in files:
            file.save(os.path.join(app.config['UPLOAD_FOLDER'], file.filename))

It works for me.

for UPLOAD_FOLDER if you need add this just after app = flask.Flask(name)

UPLOAD_FOLDER = 'static/upload'
app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER

this is a working solution for flask version '1.0.2':

images = request.files.to_dict() #convert multidict to dict
for image in images:     #image will be the key 
    print(images[image])        #this line will print value for the image key
    file_name = images[image].filename
    images[image].save(some_destination)

basically, images[image] has an image file with save function added to it Now do whatever you like to do with the data.

Using Flask 1.0.2+:

files = request.files.getlist("images")

Where images is the key of the key/value pair. With the Value being the multiple images.

You can use method getlist of flask.request.files, for example:

@app.route("/upload", methods=["POST"])
def upload():
    uploaded_files = flask.request.files.getlist("file[]")
    print uploaded_files
    return ""