Is it possible make an app with multiple subcommands invoked simultaneously?

[nazikus]

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Example Code

# copy-pasted example from https://typer.tiangolo.com/tutorial/subcommands/single-file/

import typer

app = typer.Typer()
items_app = typer.Typer()
app.add_typer(items_app, name="items")
users_app = typer.Typer()
app.add_typer(users_app, name="users")


@items_app.command("create")
def items_create(item: str):
    print(f"Creating item: {item}")


@items_app.command("delete")
def items_delete(item: str):
    print(f"Deleting item: {item}")


@items_app.command("sell")
def items_sell(item: str):
    print(f"Selling item: {item}")


@users_app.command("create")
def users_create(user_name: str):
    print(f"Creating user: {user_name}")


@users_app.command("delete")
def users_delete(user_name: str):
    print(f"Deleting user: {user_name}")


if __name__ == "__main__":
    app()

Description

I need a cli with several subcommands that are invoked simultaneously. I followed the SubCommands in a Single File, but it creates mutually exclusive commands that cannot be invoked in one command line.

Following the example from the above tutorial, such command would look like this:

$ python main.py users create "user name" items create "item name"

It fails with an error: Got unexpected extra arguments (items create item name)

Is it possible to achieve this with typer?

Operating System

Linux

Operating System Details

No response

Typer Version

0.12.4

Python Version

3.11

Additional Context

No response

[aldbr]

It seems you're trying to invoke multiple subcommands simultaneously within a single command line using typer. I am not an expert of typer, but I don't think it natively support invoking multiple subcommands in one command line.

What are you trying to achieve? In a typical command-line interface, subcommands are designed to be mutually exclusive, meaning that only one subcommand can be executed at a time per command invocation.

When you run:

$ python main.py users create "user name" items create "item name"

Typer interprets items create "item name" as unexpected extra arguments for the users create subcommand because it's still processing the first subcommand.

If you absolutely need to execute multiple actions in a single command, you can implement a command that processes multiple "subcommands" (actually arguments of your command). Here’s an example of how you could implement this:

import typer

app = typer.Typer()

@app.command("multi")
def multi_command(users_create: str = None, items_create: str = None):
    if users_create:
        typer.echo(f"Creating user: {users_create}")
        # Logic to create a user
    
    if items_create:
        typer.echo(f"Creating item: {items_create}")
        # Logic to create an item

if __name__ == "__main__":
    app()

You would then run:

$ python main.py --users-create "user name" --items-create "item name"

Let me know if this helps or if you need further assistance.