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docs: remove mentions of pydantic_v1 in tutorials (#1709)
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@@ -335,8 +335,9 @@
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" PydanticToolsParser,\n",
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")\n",
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"from langchain_core.prompts import ChatPromptTemplate, MessagesPlaceholder\n",
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"from langchain_core.pydantic_v1 import BaseModel, Field\n",
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"from langchain_core.runnables import chain as as_runnable\n",
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"# NOTE: you must use langchain-core >= 0.3 with Pydantic v2\n",
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"from pydantic import BaseModel, Field\n",
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"\n",
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"\n",
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"class Reflection(BaseModel):\n",
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