多个 CLI 选项

您可以声明一个可以多次使用的CLI 选项，然后获取所有值。

例如，假设您想在一次执行中接受多个用户。

为此，请使用标准 Python typing.List 将其声明为str 的list

Python 3.7+Python 3.7+ 非注释

from typing import List, Optional

import typer
from typing_extensions import Annotated


def main(user: Annotated[Optional[List[str]], typer.Option()] = None):
    if not user:
        print(f"No provided users (raw input = {user})")
        raise typer.Abort()
    for u in user:
        print(f"Processing user: {u}")


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

提示

如果可能，请优先使用Annotated 版本。

from typing import List, Optional

import typer


def main(user: Optional[List[str]] = typer.Option(None)):
    if not user:
        print(f"No provided users (raw input = {user})")
        raise typer.Abort()
    for u in user:
        print(f"Processing user: {u}")


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

您将收到与声明时相同的类型的值，即str 的list。

检查它

// The default value is 'None'
$ python main.py

No provided users (raw input = None)
Aborted!

// Now pass a user
$ python main.py --user Camila

Processing user: Camila

// And now try with several users
$ python main.py --user Camila --user Rick --user Morty

Processing user: Camila
Processing user: Rick
Processing user: Morty

多个 float

同样地，您可以使用其他类型，它们将被 **Typer** 转换为其声明的类型

Python 3.7+Python 3.7+ 非注释

from typing import List

import typer
from typing_extensions import Annotated


def main(number: Annotated[List[float], typer.Option()] = []):
    print(f"The sum is {sum(number)}")


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

提示

如果可能，请优先使用Annotated 版本。

from typing import List

import typer


def main(number: List[float] = typer.Option([])):
    print(f"The sum is {sum(number)}")


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

检查它

$ python main.py

The sum is 0

// Try with some numbers
$ python main.py --number 2

The sum is 2.0

// Try with some numbers
$ python main.py --number 2 --number 3 --number 4.5

The sum is 9.5