langchainv0.2 create_csv_agent memory

langchain v0.2版本 csv添加memory示例

Name		Name	Last commit message	Last commit date
Latest commit History 2 Commits
.gitignore		.gitignore
README.md		README.md
__init__.py		__init__.py
agent.py		agent.py
csv_base.py		csv_base.py
pandas_base.py		pandas_base.py

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