[Solved] Identify the issue in this custom agent code:class CustomAgent: def plan(self, input_text): return f'Processing: {input_text}' agent = CustomAgent() agent.plan('Test') | LangChain

LangChain - Agents

Identify the issue in this custom agent code:

class CustomAgent:
    def plan(self, input_text):
        return f'Processing: {input_text}'

agent = CustomAgent()
agent.plan('Test')

AThe plan method is correctly defined and will run without errors

BThe plan method is missing the 'self' parameter

CThe class is missing inheritance from a base agent class

DThe plan method should return an integer, not a string

Step-by-Step Solution

Solution:

Step 1: Check method signature
The plan method correctly includes 'self' and 'input_text' parameters.
Step 2: Verify method usage
Calling agent.plan('Test') passes a string argument as expected.
Step 3: Confirm return type
Returning a formatted string is valid for custom agent logic.
Final Answer:
The plan method is correctly defined and will run without errors -> Option A
Quick Check:
Method signature and call match [OK]

Quick Trick: Check method parameters and usage [OK]

Common Mistakes:

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