add blog post about typer

pages/blog/typer-a-python-library-for-building-cli-applications/ecommerce.py

@@ -0,0 +1,58 @@
+import typer
+
+from typer import Context, Option
+
+
+app = typer.Typer(help="Operations for e-commerce.")
+app_user = typer.Typer(help="Operations for user model.")
+app_product = typer.Typer(help="Operations for product model.")
+
+app.add_typer(app_user, name="user")
+app.add_typer(app_product, name="product")
+
+@app.callback(invoke_without_command=True)
+def main(
+    ctx: Context,
+    version: bool = Option(
+        None,
+        "--version",
+        "-v",
+        is_flag=True,
+        help="Show the version and exit.",
+    ),
+) -> None:
+    """Process envers for specific flags, otherwise show the help menu."""
+    if version:
+        __version__ = "0.1.0"
+        typer.echo(f"Version: {__version__}")
+        raise typer.Exit()
+
+    if ctx.invoked_subcommand is None:
+        typer.echo(ctx.get_help())
+        raise typer.Exit(0)
+
+@app_user.command("create")
+def user_create(name: str = typer.Argument(..., help="Name of the user to create.")) -> None:
+    """Create a new user with the given name."""
+    print(f"Creating user: {name} - Done")
+
+
+@app_user.command("update")
+def user_update(name: str = typer.Argument(..., help="Name of the user to update.")) -> None:
+    """Update user data with the given name."""
+    print(f"Updating user: {name} - Done")
+
+@app_product.command("create")
+def product_create(name: str = typer.Argument(..., help="Name of the product to create.")) -> None:
+    """Create a new product with the given name."""
+    print(f"Creating product: {name} - Done")
+
+
+@app_product.command("update")
+def product_update(name: str = typer.Argument(..., help="Name of the product to update.")) -> None:
+    """Update a product with the given name."""
+    print(f"Updating product: {name} - Done")
+
+
+if __name__ == "__main__":
+    app()

pages/blog/typer-a-python-library-for-building-cli-applications/greet.py

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+
+import typer
+
+app = typer.Typer()
+
+@app.command()
+def greet(
+    name: str = typer.Option(
+        ..., 
+        "--name",
+        help="The name of the person to greet."
+    )
+) -> None:
+    """Greets the user by name."""
+    typer.echo(f"Hello {name}!")
+
+if __name__ == "__main__":
+    app()