Given two chains, chain1 outputs {'text': 'Hello'}, and chain2 takes input key 'text'. What will SequentialChain(chains=[chain1, chain2]) pass to chain2?

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LangChain - Chains and LCEL

Given two chains, chain1 outputs {'text': 'Hello'}, and chain2 takes input key 'text'. What will SequentialChain(chains=[chain1, chain2]) pass to chain2?

A{'text': 'Hello'}

B{'input': 'Hello'}

C{}

D{'output': 'Hello'}

Step-by-Step Solution

Solution:

Step 1: Understand output-input passing in SequentialChain
SequentialChain passes outputs from one chain as inputs to the next using matching keys.
Step 2: Match output key to input key
chain1 outputs {'text': 'Hello'}, chain2 expects 'text' input, so it receives {'text': 'Hello'}.
Final Answer:
{'text': 'Hello'} -> Option A
Quick Check:
Output key matches input key = {'text': 'Hello'} [OK]

Quick Trick: Output keys must match next chain's input keys [OK]

Common Mistakes:

Assuming keys change automatically
Passing empty dict if keys don't match
Using wrong key names like 'input' or 'output'

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Given two chains, chain1 outputs {'text': 'Hello'}, and chain2 takes input key 'text'. What will SequentialChain(chains=[chain1, chain2]) pass to chain2?

Step 1: Understand output-input passing in SequentialChain

Step 2: Match output key to input key

Final Answer:

Quick Check:

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