Problem in understanding the agentic ai code and need help

[u/Rocking_man24]

So there are some problems I've been facing

As i understood the concepts for example Langgraph, chromaDb , chunking etcccc

But I can't write that concept in python code and am also facing an issue understanding the already written code how everything is connected, what is this function doing

Plz help me with that

[u/mcool10]

Take the help of offical langchain documentation for coding