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Given this state schema class:

medium📝 component behavior Q4 of 15
LangChain - LangGraph for Stateful Agents
Given this state schema class:
class SessionState:
    user_id: int
    active: bool

What will be the type of active in an instance of SessionState?
AList of active users.
BInteger representing the session status.
CString describing the session state.
DBoolean value indicating if the session is active.
Step-by-Step Solution
Solution:
  1. Step 1: Analyze the field type in the schema

    The field active is declared as bool, which means it holds a True or False value.
  2. Step 2: Match the type to the description

    Boolean indicates if the session is active or not, matching Boolean value indicating if the session is active.
  3. Final Answer:

    Boolean value indicating if the session is active. -> Option D
  4. Quick Check:

    Field type bool = Boolean value [OK]
Quick Trick: Type hints show expected data type clearly [OK]
Common Mistakes:
MISTAKES
  • Confusing bool with int or string
  • Assuming active is a list or complex type
  • Ignoring type hints in schema

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