Typer: Build Great CLIs with Python Type Hints

0.24.1 · active · verified Sat Mar 28

Typer is a Python library for building command-line interfaces (CLIs) that are easy to code and based on Python type hints. The current version is 0.24.1, released on March 28, 2026. Typer follows a regular release cadence, with updates approximately every few months.

Warnings

breaking Dropped support for Python 3.9 in version 0.24.0.
Fix: Upgrade to Python 3.10 or later.
deprecated Support for 'typer-slim' and 'typer-cli' has been dropped; use only 'typer'.
Fix: Install 'typer' directly and remove 'typer-slim' or 'typer-cli' from your environment.

Install

pip install typer Install Typer

Imports

Typer
```
import typer
```
Ensure 'typer' is installed in your environment.

Quickstart

A minimal Typer application that greets the user by name.

import typer

app = typer.Typer()

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

if __name__ == "__main__":
    app()

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