Builtin Types

When Python builtin types are used as type annotations they are automatically mapped to the corresponding type in the chosen file format. Any of these types will accept None as a value when made optional.

from typing import Optional

Booleans

Type Annotation	Python Value	YAML Content
`foobar: bool`	`foobar = True`	`foobar: true`
`foobar: bool`	`foobar = False`	`foobar: false`
`foobar: bool`	`foobar = None`	`foobar: false`
`foobar: Optional[bool]`	`foobar = False`	`foobar:`

Integers

Type Annotation	Python Value	YAML Content
`foobar: int`	`foobar = 42`	`foobar: 42`
`foobar: int`	`foobar = 1.23`	`foobar: 1`
`foobar: int`	`foobar = None`	`foobar: 0`
`foobar: Optional[int]`	`foobar = None`	`foobar:`

Floats

Type Annotation	Python Value	YAML Content
`foobar: float`	`foobar = 1.23`	`foobar: 1.23`
`foobar: float`	`foobar = 42`	`foobar: 42.0`
`foobar: float`	`foobar = None`	`foobar: 0.0`
`foobar: Optional[float]`	`foobar = None`	`foobar:`

Strings

Type Annotation	Python Value	YAML Content
`foobar: str`	`foobar = "Hello, world!"`	`foobar: Hello, world!`
`foobar: str`	`foobar = 42`	`foobar: "42"`
`foobar: str`	`foobar = None`	`foobar: ""`
`foobar: Optional[str]`	`foobar = None`	`foobar:`