[Solved] Consider this LangChain code snippet:chain1 = SomeChain() chain2 = AnotherChain() composed = chain1 | chain2 composed = chain1 & chain2What is the issue with the last line? | LangChain

LangChain - Chains and LCEL

Consider this LangChain code snippet:

chain1 = SomeChain()
chain2 = AnotherChain()
composed = chain1 | chain2
composed = chain1 & chain2

What is the issue with the last line?

AUsing & instead of | causes a syntax or runtime error

BIt correctly composes chains with & operator

CIt overwrites the composed chain without error

DIt creates a new chain that runs both chains in parallel

Step-by-Step Solution

Solution:

Step 1: Identify correct operator for chain composition
LangChain uses the pipe operator | to compose chains, not &.
Step 2: Analyze effect of using & operator
Using & is invalid syntax or unsupported, causing an error when running the code.
Final Answer:
Using & instead of | causes a syntax or runtime error -> Option A
Quick Check:
Wrong operator = error [OK]

Quick Trick: Only use | for chaining; & causes errors [OK]

Common Mistakes:

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