CLI with typer

import typer
 
app = typer.Typer()
 
 
@app.command()
def hello(name: str):
    print(f"Hello {name}")
 
 
@app.command()
def goodbye(name: str, formal: bool = False):
    if formal:
        print(f"Goodbye Ms. {name}. Have a good day.")
    else:
        print(f"Bye {name}!")
 
 
if __name__ == "__main__":
    app()