Custom Types

You can easily use your own custom types in your Typer applications.

The way to do it is by providing a way to parse input into your own types.

There are two ways to achieve this:

• Adding a type parser
• Expanding Click's custom types

Type Parser

typer.Argument and typer.Option can create custom parameter types with a parser callable.

{ docs_src/parameter_types/custom_types/tutorial001_an.py hl[13:14,18:19] }

The function (or callable) that you pass to the parameter parser will receive the input value as a string and should return the parsed value with your own custom type.

Click Custom Type

If you already have a Click Custom Type, you can use it in typer.Argument() and typer.Option() with the click_type parameter.

{ docs_src/parameter_types/custom_types/tutorial002_an.py hl[14:18,22:25] }