[Solved] What is wrong with this LangGraph flow setup?nodeA.connect(nodeB) nodeB.connect(nodeC, condition=lambda x: x When input is 5, the flow throws an error. | LangChain

LangChain - LangGraph for Stateful Agents

What is wrong with this LangGraph flow setup?

nodeA.connect(nodeB)
nodeB.connect(nodeC, condition=lambda x: x < 0)
nodeC.connect(nodeD)

When input is 5, the flow throws an error.

ACondition lambda must return True for all inputs.

BnodeC cannot connect to nodeD without a condition.

CNo error should occur; the flow stops at nodeB if condition fails.

DnodeB.connect syntax is incorrect.

Step-by-Step Solution

Solution:

Step 1: Analyze flow and condition
Condition on nodeB to nodeC allows flow only if input < 0.
Step 2: Input 5 fails condition, so flow stops at nodeB
This is expected behavior; no error should occur.
Final Answer:
No error should occur; the flow stops at nodeB if condition fails. -> Option C
Quick Check:
Failed condition = flow stops, no error [OK]

Quick Trick: Failed conditions stop flow, no error [OK]

Common Mistakes:

MISTAKES

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