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How should you configure LangGraph connections to route an agent based on input ranges: below 10, between 10 and 20, and above 20?

hard📝 Conceptual Q8 of 15
LangChain - LangGraph for Stateful Agents
How should you configure LangGraph connections to route an agent based on input ranges: below 10, between 10 and 20, and above 20?
ACreate three edges from the node with conditions using lambda functions for each range
BConnect nodes without conditions and handle routing inside each node
CUse a single connection and parse input inside the target node
DSet up sequential nodes without conditions to cover all ranges
Step-by-Step Solution
Solution:
  1. Step 1: Understand conditional routing

    LangGraph uses conditions on edges to decide which path to follow based on input.
  2. Step 2: Apply range conditions

    Define three connections from the node, each with a lambda function checking the input range.
  3. Final Answer:

    Create three edges from the node with conditions using lambda functions for each range -> Option A
  4. Quick Check:

    Use conditional edges for range-based routing [OK]
Quick Trick: Use conditional edges with lambdas for input ranges [OK]
Common Mistakes:
MISTAKES
  • Ignoring conditions and routing inside nodes
  • Using a single edge for multiple ranges
  • Setting up sequential nodes without conditions

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