Human-in-the-loop with LangGraph in LangChain - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the HumanLoop class from langgraph.

LangChain

from langgraph import [1]

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APrompt

BAgent

CHumanLoop

DChain

Attempts:

3 left

💡 Hint

Common Mistakes

Importing unrelated classes like Agent or Chain.

Misspelling the class name.

The HumanLoop class is imported from langgraph to create human-in-the-loop workflows.

2fill in blank

medium

Complete the code to create a HumanLoop instance with the name 'review_loop'.

LangChain

loop = HumanLoop(name=[1])

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A'review_loop'

B'check_loop'

C'loop_review'

D'human_review'

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different name than 'review_loop'.

Forgetting quotes around the string.

The HumanLoop instance is named 'review_loop' to identify the human review step.

3fill in blank

hard

Fix the error in the code to add a human review step to the LangGraph chain.

LangChain

chain.add_step([1])

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AHumanLoop

BHumanLoop('review_loop')

CHumanLoop()

DHumanLoop(name='review_loop')

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the class itself instead of an instance.

Omitting the name parameter.

The add_step method requires an instance of HumanLoop with the name parameter specified.

4fill in blank

hard

Fill both blanks to define a LangGraph chain with a human-in-the-loop review step and run it with input 'data'.

LangChain

chain = LangGraph().add_step([1])
result = chain.[2](input_data='data')

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AHumanLoop(name='review_loop')

Brun

Cexecute

Dstart

Attempts:

3 left

💡 Hint

Common Mistakes

Using the wrong method name to run the chain.

Not creating the HumanLoop instance properly.

The chain adds a HumanLoop step named 'review_loop' and runs with the run method.

5fill in blank

hard

Fill all three blanks to create a LangGraph chain with a human loop, set a prompt, and run it with user input.

LangChain

loop = HumanLoop(name=[1])
chain = LangGraph().add_step(loop).set_prompt([2])
output = chain.[3](input_data='user input')

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

A'human_review'

B'Please review the output:'

Crun

Dexecute

Attempts:

3 left

💡 Hint

Common Mistakes

Using incorrect names or prompt strings.

Using the wrong method to run the chain.

The human loop is named 'human_review', the prompt is set to 'Please review the output:', and the chain is run with the run method.