typer 命令的输出在终端中不可见

Question

I'm trying to use Typer package in python.

I wrote this code:

import typer


app = typer.Typer()


@app.command()
def hello(name: str):
    print(f"Hello {name}")

And I'm trying to run this with this command:

python main.py hello Patryk

And my terminal is not displaying anything. No errors, no text.

Python version: Python 3.9.13 (pipenv) System: Macos Ventura 13.1 Terminal: iTerm2 Build 3.4.18 and Macos default terminal

I tried to not use pipenv and install all typer on my machine.

I also tried this piece of code:

import typer


def main(name: str):
    print(f"Hello {name}")


if __name__ == "__main__":
    typer.run(main)

And it works when I run it with this command:

python main.py

Answer 1

I found solution. To make it work you need to add:

if __name__ == "__main__":
    app()

And have at least 2 commands, so your code has to look like this:

import typer


app = typer.Typer()


@app.command()
def hello(name: str):
    print(f"Hello {name}")


@app.command()
def goodbye(name: str):
    print(f"Goodbye {name}")


if __name__ == "__main__":
    app()