Extraction

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class CharacterDescription {
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  name string
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  clothingItems string[]
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  hairColor string? @description(#"
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    The color of the character's hair.
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  "#)
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  spells Spells[]
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}
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class Spells {
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  name string
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  description string
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} 
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function DescribeCharacter(image_or_paragraph: image | string) -> CharacterDescription {
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  client GPT4o
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  prompt #"
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    {{ _.role("user")}}
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    Describe this character according to the schema provided:
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    {{ image_or_paragraph }}
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    {{ ctx.output_format }}
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    Before you answer, explain your reasoning in 3 sentences.
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  "#
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}

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from baml_client import b
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from baml_client.types import CharacterDescription
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from baml_py import Image
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...
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  result = await b.DescribeCharacter("...")
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  assert isinstance(result, CharacterDescription)
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  result_from_image = await b.DescribeCharacter(Image.from_url("http://..."))