👀 Views: 89 💬 Answers: 1 📅 Created: 2025-06-22

python-3.x click command-line cli Python

I've been researching this but I'm stuck trying to I'm having trouble with the Click library in Python 3.8 when trying to handle command-line options. My goal is to create a command that accepts an optional argument and displays a message based on the input. However, I'm working with an unexpected behavior where the command seems to ignore the optional argument. Here's my implementation: ```python import click @click.command() @click.option('--name', default='World', help='Name to greet') def greet(name): click.echo(f'Hello, {name}!') if __name__ == '__main__': greet() # This line seems to bypass Click's CLI ``` When I run the script as follows: ```bash python my_script.py --name Alice ``` I expect the output to be `Hello, Alice!`, but instead, I get `Hello, World!`. It seems like the `greet()` function is being called directly without Click parsing the command-line arguments. I tried using `if __name__ == '__main__':` with `click.run(greet)` instead of calling `greet()` directly, but I still see the same result. Here's what that version looks like: ```python if __name__ == '__main__': greet() # This should be replaced by click.run(greet) ``` With the change to `click.run(greet)`, it raises an behavior stating `TypeError: greet() got an unexpected keyword argument 'name'`. I’m a bit confused about how to properly set this up so that Click can handle the options correctly. Any insight on how to fix this would be greatly appreciated, especially regarding how to structure the entry point correctly for Click commands. Any pointers in the right direction? I'm working with Python in a Docker container on CentOS. I'd love to hear your thoughts on this. I'm on Ubuntu 22.04 using the latest version of Python. Any examples would be super helpful.