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Fix typing imports in extraction usecase (#11402)

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The person class here:
https://python.langchain.com/docs/use_cases/extraction#pydantic-1 has
attributes `dog_breed` and `dog_name` that use `Optional` from typing,
but it hasn't been imported. Fixed the import here
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bholagabbar 2023-10-04 16:55:02 -04:00 committed by GitHub
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commit b9fad28f5e
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docs/extras/use_cases/extraction.ipynb
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@ -443,7 +443,7 @@
} }
], ],
"source": [ "source": [
"from typing import Sequence\n", "from typing import Sequence, Optional\n",
"from langchain.prompts import (\n", "from langchain.prompts import (\n",
" PromptTemplate,\n", " PromptTemplate,\n",
" ChatPromptTemplate,\n", " ChatPromptTemplate,\n",