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Signup-now with 50% offer I assume You already developed your flask application in your local environment, have a Heroku account, and have some basic knowledge of working with git and Command-line Interface.Else If you are new Python Flask, Checkout the amazing course from Pluralsight called





why Heroku?

Heroku Free account provides 550 free dyno hours and free domain

Example: https://app_name.herokuapp.com.





Heroku Provide some option to Deploy App:





First one is deployed your app by linking your GitHub repository with your Heroku Account

Another one is using the Heroku Command-line Interface (Heroku CLI) by pushing the application on Heroku git servers





Here in this post, I will demonstrate how to deploy the flask app by linking your GitHub repository with Heroku





1: Deploy your app on GitHub:

Develop your application and initialize and commit your changes with git on your local work base



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Here in the example, I am making local repository contain one simple flask app called app.py













2: Install a web server called Gunicorn

In order to host application Heroku, we need to install a webserver called Gunicorn .





Run the following command in your command line to install gunicorn





pip install gunicorn















3: Create a requirements.txt file

Now you want to output all your dependent packages for that application needs in a file called requirements.txt

run the following command in your command line





pip freeze > requirements.txt





check the requirements.txt contains all your required packages to run the application

cat requirements.txt

















4: Create a Procfile:

Procfile is a mechanism for declaring what commands are run by your application’s dynos on the Heroku platform.





Create the file in name of Procfile there is no Extension and their P is Upper case





paste that following lines on Procfile





web gunicorn app:app













Here web is used by Heroku to start a web server for the application

app:app denotes that module and application name in our case both are called app if it differs on your application change that accordingly





5: Push that repository on Github:

Create a repository on GitHub

add and commit your files in the local repository













And push that on the GitHub master branch





Example Screenshots:















6: Create an App on Heroku:

Before creating an app make sure your GitHub account is connected with Heroku Account





then create an app on Heroku here is the example













Open your Heroku app go to deploy option





select the Deployment method as Github,





Search your repository with a name and click connect





Deploy:

On the below, you can see the manual deploy option

select your branch name in the case it is a master branch









Click the deploy branch option





Now your app started to deploy on Heroku wait for some time

















after the successful message popup view your app by that URL

https://yourapplicationname.herokuapp.com





in the case, https://deploy-flask-app.herokuapp.com/ is my URL









Finish Now you have successfully deployed your application on Heroku





If you see "Application Error"?





Procfile and make sure your python run time is supported by Heroku >



Thank you for reading... If you see the Any application error once again check yourand make sure your python run time is supported by Heroku > Heroku Python Support Thank you for reading...





checkou my new blog https://alphazeroerror.github.io/









Deploying a python flask app has many ways to do, and there is a lot of platforms availableHere I am going to show how to deploy a python flask application on Heroku in a free plan