How to create a custom command?

To create a custom command in Python using the Flask CLI, you can follow these steps:

1. Install Flask (if you haven't already):

   pip install Flask

2. Create a Python file (e.g., commands.py) and add the following code:

   import click
   
   @click.command()
   @click.argument('name')
   def greet(name):
       click.echo(f'Hello, {name}!')
   
   if __name__ == '__main__':
       greet()

3. Run the custom command from the terminal by executing the following command:

   python commands.py John

   This will output:

   Hello, John!

Explanation:

• The @click.command() decorator defines a new command.
• The @click.argument('name') decorator specifies that the command takes one argument, name.
• The click.echo() function is used to print the greeting message.

You can modify the command and its functionality as needed!