Session
The Application Layer: 7 Python Libraries Powering Modern AI Systems
Python has always been one of the most practical languages for building AI applications. This is not a list of machine-learning or deep-learning libraries. Instead, these are libraries that help you build the application layer around modern AI models.
The seven I would pay particular attention to are:
LangGraph — agent orchestration and stateful workflows
LlamaIndex — context and data-connected AI applications
Pydantic AI — typed AI agents
LiteLLM — unified access to LLM providers
MCP Python SDK — standardized tools and context for AI applications
Instructor — structured outputs from LLMs
Guardrails AI — validation and safety around model outputs
Sai Krishna Puli
LabCorp Early Drug Development Laboratories - Data Architect/Lead Application Architect
Atlanta, Georgia, United States
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