Creating a New Flask Project

Before getting started, make sure you have Python and pip installed on your system. If you don’t already have them, you can download them from the official Python website and official Pip website.

With Python and pip installed, you can create a new Flask project. First, install Flask using pip:

pip install flask

Then, create a new Python file (e.g., app.py) and add the following code to create a basic Flask application:

from flask import Flask
app = Flask(__name__)

@app.route('/')
def hello_world():
    return 'Hello, World!'

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=80)

In the above code, we create a basic route that returns “Hello, World!” when accessed. The application is configured to run on port 80, which is the default port for HTTP traffic.

Managing Dependencies with the requirements.txt File

The requirements.txt file is a file that lists all external libraries required for your project. You should list all libraries your project will use, excluding native libraries like random and datetime. This file should be included when submitting your application to Square Cloud.

requirements.txt
flask

Creating the Configuration File on Square Cloud

Square Cloud requires a specific configuration file to host your application. You can access our step-by-step guide on how to create one: How to Create Your Square Cloud Configuration File

Configuring the START Field

In the Square Cloud configuration file, the START field is optional and is only necessary if you are using a custom script to start the website. In the example provided, the START field is not necessary.

Uploading Your Application to Square Cloud

After following all the steps, package your application files into a zip file where the configuration file is and upload the site on Upload. Remember to include the requirements.txt file, but do not include files like __pycache__. You can get more information about unnecessary files when hosting at automatic-deletion-files-when-deploying-an-application-to-squarecloud.

Troubleshooting

Additional Resources

For more information about Flask and its tools, visit the official Flask documentation. There, you’ll find detailed guides, tutorials, and API documentation to help you make the most out of Flask.

If you continue to encounter issues, don’t hesitate to contact our support team.