Parse known and unknown args with typer cli

Question

with argparse I could parse both the known and the unknown args

import argparse
parser = argparse.ArgumentParser()
parser.add_argument('--foo')
known, unknown = parser.parse_known_args(['--foo', 'BAR', 'spam'])
print(known)
# Namespace(foo='BAR')
print(unknown)
# ['spam']

How can you do this with typer?

Answer 1

Running this:

from sys import argv

import typer

app = typer.Typer()


@app.command(
    context_settings={"allow_extra_args": True, "ignore_unknown_options": True}
)
def main(foo: str = typer.Option(...), unknown_args: typer.Context = typer.Option(None)):
    typer.echo(f"known arg: {foo}")
    for unknown_arg in unknown_args.args:
        typer.echo(f"Got extra arg: {unknown_arg}")


if __name__ == "__main__":
    argv.extend(["--foo", "BAR", "spam"])
    app()

will output:

known arg: BAR
Got extra arg: spam

source:

• https://typer.tiangolo.com/tutorial/commands/context/#configuring-the-context
• https://github.com/tiangolo/typer/issues/163