Issues importing langchain.chains,langchain.prompts after installing LangChain v1(1.2.3) modular packages

[Muhammad-Hassan-Deve]

Thanks sir , my error solved
so can you tell me how to reads its official packages and its modules and class and its parameters from its official docs because i don’t know which package have which modules

Example :
langchain_classic.chains RetrivalQA

or

langchain.chains RetrivalQA