Chains (sequential, router) in Prompt Engineering / GenAI - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a sequential chain that runs two steps in order.

Prompt Engineering / GenAI

from langchain.chains import SequentialChain
chain = SequentialChain(chains=[chain1, [1]], input_variables=["input"], output_variables=["output"])
result = chain.run("Hello")

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

Achain2

Bchain3

Cchain4

Dchain5

Attempts:

3 left

💡 Hint

Common Mistakes

Using a chain variable that is not defined.

Swapping the order of chains.

The second chain in the sequence should be 'chain2' to run after 'chain1'.

2fill in blank

medium

Complete the code to define a router chain that selects chains based on input keys.

Prompt Engineering / GenAI

from langchain.chains.router import RouterChain
router = RouterChain(chains={'sales': sales_chain, 'support': [1], default_chain=default_chain)
response = router.run("support request")

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

Afinance_chain

Bmarketing_chain

Chr_chain

Dsupport_chain

Attempts:

3 left

💡 Hint

Common Mistakes

Using a chain that does not match the key.

Forgetting to include the correct chain in the dictionary.

The router should map the 'support' key to 'support_chain' to handle support requests.

3fill in blank

hard

Fix the error in the sequential chain code by filling the blank correctly.

Prompt Engineering / GenAI

from langchain.chains import SequentialChain
chain = SequentialChain(chains=[chain1, chain2], input_variables=["input"], output_variables=[[1]])
result = chain.run("Test")

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

A["result"]

B["answer"]

C["output"]

D["response"]

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name not matching the chain's output.

Not using a list for output_variables.

The output_variables must match the output key from the chains, commonly 'output'.

4fill in blank

hard

Fill both blanks to create a router chain that routes 'billing' and 'tech' requests correctly.

Prompt Engineering / GenAI

router = RouterChain(chains=[1], default_chain=default_chain)
response = router.run("billing issue")

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

A{'billing': tech_chain, 'tech': billing_chain}

B{'billing': billing_chain, 'tech': tech_chain}

C{'billing': default_chain, 'tech': tech_chain}

D{'billing': billing_chain, 'tech': default_chain}

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the chains for keys.

Using default_chain instead of specific chains.

The router dictionary must map 'billing' to billing_chain and 'tech' to tech_chain for correct routing.

5fill in blank

hard

Fill all three blanks to build a sequential chain with correct input and output variables.

Prompt Engineering / GenAI

chain = SequentialChain(chains=[chainA, chainB], input_variables=[[1]], output_variables=[[2]])
result = chain.run([3])

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

A"user_input"

B"final_output"

C{"user_input": "Hello"}

D"input_text"

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong variable names for input or output.

Passing a string instead of a dictionary to run.

Input variable is 'user_input', output variable is 'final_output', and run method input is a dict with 'user_input' key.