Multiple Images Ony the Last One Uploads Caldera Form

Introduction

Here I am going to show you how to upload multiple images and brandish them one by 1 in one case images get uploaded using Python programming linguistic communication. I am using here Flask as a web based framework on top of Python language.

On the UI (User Interface) there is an input field which is used to select multiple files. To select multiple files subsequently clicking on scan push button you lot need to hold Ctrl key (Windows OS) on the keyboard and click on the images you want to select for upload.

Related Posts:

• Upload and display an image using Python and Flask

I accept added some basic validation on file type, i.e., only image files will be uploaded. If you select non-image files then these files will not exist uploaded. It will not throw any error in case non-image file only volition not be uploaded.

Prerequisites

Python three.8.iii – 3.ix.1, Flask i.i.2

Project Directory

Create a project root directory calledpython-flask-upload-display-multiple-images as per your chosen location.

I may not mention the project's root directory name in the subsequent sections but I will assume that I am creating files with respect to the project's root directory.

Flask Configuration

You demand flask instance in order to run web application using Flask framework.

I will also define the file upload location and maximum size of the file a user can upload.

You should not let user to upload unlimited size of file due to security reasons or to avert exhausting server space.

The standard directory for storing static resource such equally images, css, JavaScript files into Flask application is to put understatic directory. Here I am putting the uploaded file netherstatic/uploads directory from where finally it volition display the epitome on the web page.

Create a file chosenapp.py with the below code.

          from flask import Flask  UPLOAD_FOLDER = 'static/uploads/'  app = Flask(__name__) app.secret_key = "surreptitious cardinal" app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER app.config['MAX_CONTENT_LENGTH'] = 16 * 1024 * 1024        

Upload Multiple Images

Side by side I volition createmain.py script to configure the endpoint for uploading multiple images. It defines the required URIs for performing file upload operations.

I accept allowed sure types of images, such as png, jpg, jpeg, gif.

I am using http method Mail service to upload image files. later on uploading and saving the image to deejay I am returning the filename to the jinja2 flask template.

I have another functiondisplay_image() that is used on the flask template to display the actual images from thestatic/uploads folder.

This beneath line is required when you want to serve the file or image fromstatic folder but.

          return redirect(url_for('static', filename='uploads/' + filename), code=301)        

I have usedupload.html page for uploading multiple files to the desired directory.

          import os from app import app import urllib.request from flask import Flask, wink, request, redirect, url_for, render_template from werkzeug.utils import secure_filename  ALLOWED_EXTENSIONS = prepare(['png', 'jpg', 'jpeg', 'gif'])  def allowed_file(filename): 	return '.' in filename and filename.rsplit('.', 1)[ane].lower() in ALLOWED_EXTENSIONS 	 @app.road('/') def upload_form(): 	return render_template('upload.html')  @app.route('/', methods=['Post']) def upload_image(): 	if 'files[]' non in asking.files: 		flash('No file office') 		return redirect(request.url) 	files = request.files.getlist('files[]') 	file_names = [] 	for file in files: 		if file and allowed_file(file.filename): 			filename = secure_filename(file.filename) 			file_names.suspend(filename) 			file.salvage(bone.path.join(app.config['UPLOAD_FOLDER'], filename)) 		#else: 		#	flash('Allowed image types are -> png, jpg, jpeg, gif') 		#	return redirect(asking.url)  	return render_template('upload.html', filenames=file_names)  @app.road('/display/<filename>') def display_image(filename): 	#print('display_image filename: ' + filename) 	render redirect(url_for('static', filename='uploads/' + filename), code=301)  if __name__ == "__main__":     app.run()        

Template View File

The default location in flask based applications of the template or view files is templates binder. This isupload.html folio kept nether templates directory.

          <!doctype html> <title>Python Flask Upload Multiple Images and Display them</title> <h2>Select multiple images to upload and display</h2> <p> 	{% with messages = get_flashed_messages() %} 	  {% if messages %} 		<ul class=flashes> 		{% for message in messages %} 		  <li>{{ message }}</li> 		{% endfor %} 		</ul> 	  {% endif %} 	{% endwith %} </p>  <grade method="mail" activity="/" enctype="multipart/form-data">     <dl> 		<p> 			<input type="file" proper name="files[]" multiple="truthful" autocomplete="off" required> 		</p>     </dl>     <p> 		<input type="submit" value="Submit"> 	</p> </grade>  {% if filenames %} 	{% for filename in filenames %} 		<div> 			<img src="{{ url_for('display_image', filename=filename) }}"> 		</div> 	{% endfor %} {% endif %}        

Deploy the Application

Now navigate to the projection'southward root directory using command line tool and execute the commandpython main.py, your server will be started on default port5000.

If y'all want to modify the port so you can change the lineapp.run() toapp.run(port=5001), where5001 is the new port.

Test the Application

When you hitting the URLhttp://localhost:5000 in the browser to get the below page to upload the paradigm.

I selected 2 prototype files and uploaded for display on the page:

Source Code

Download

newdegateandareat83.blogspot.com

Source: https://roytuts.com/upload-and-display-multiple-images-using-python-and-flask/

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