LangGraph for stateful agents in Agentic AI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to initialize a LangGraph agent with a state.

Agentic AI

agent = LangGraphAgent(state=[1])

Drag options to blanks, or click blank then click option'

A{}

B0

CNone

D[]

Attempts:

3 left

💡 Hint

Common Mistakes

Using None instead of an empty dictionary causes errors when updating state.

Using a list [] does not allow key-based state storage.

The agent's state should be initialized as an empty dictionary {} to hold key-value pairs representing the agent's memory.

2fill in blank

medium

Complete the code to update the agent's state with a new key-value pair.

Agentic AI

agent.state[[1]] = 'active'

Drag options to blanks, or click blank then click option'

Astatus

B'status'

C'state'

D'mode'

Attempts:

3 left

💡 Hint

Common Mistakes

Forgetting quotes around the key causes a NameError.

Using an incorrect key name that doesn't match the intended state.

Keys in dictionaries must be strings enclosed in quotes, so 'status' is correct.

3fill in blank

hard

Fix the error in the code to retrieve the agent's current mode safely.

Agentic AI

current_mode = agent.state.get([1], 'idle')

Drag options to blanks, or click blank then click option'

Amode

Bstatus

C'state'

D'mode'

Attempts:

3 left

💡 Hint

Common Mistakes

Using unquoted keys causes NameError.

Using wrong key names returns unexpected results.

The key must be a string in quotes, so 'mode' is correct to safely get the value or default to 'idle'.

4fill in blank

hard

Fill both blanks to create a LangGraph agent that updates state and then retrieves a value.

Agentic AI

agent.state[[1]] = 'running'
mode = agent.state.get([2], 'stopped')

Drag options to blanks, or click blank then click option'

A'mode'

B'status'

D'state'

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing up keys causes wrong state updates or retrievals.

Forgetting quotes around keys causes errors.

First, update the 'status' key to 'running', then retrieve the 'mode' key with default 'stopped'.

5fill in blank

hard

Fill all three blanks to define a function that updates the agent's state and returns the updated value.

Agentic AI

def update_agent_state(agent, key, value):
    agent.state[[1]] = [2]
    return agent.state.get([3])

Drag options to blanks, or click blank then click option'

Akey

Bvalue

D'value'

Attempts:

3 left

💡 Hint

Common Mistakes

Using string literals instead of variables.

Forgetting to return the updated value.

Use the function parameters key and value to update and then retrieve the state by key.