Installing and setting up LangChain - Interactive Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to install LangChain using pip.

LangChain

pip install [1]

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Alangchain

Bnumpy

Crequests

Dflask

Attempts:

3 left

💡 Hint

Common Mistakes

Trying to install unrelated packages like numpy or flask.

Forgetting to use pip before the package name.

To install LangChain, you use the command pip install langchain.

2fill in blank

medium

Complete the code to import the main LangChain class for chains.

LangChain

from langchain.chains import [1]

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AChain

BChains

CLangChain

DLLMChain

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'Chain' which does not exist in this context.

Trying to import 'LangChain' which is not a class.

The main class to create chains in LangChain is LLMChain.

3fill in blank

hard

Fix the error in the code to create a LangChain LLM instance.

LangChain

from langchain.llms import [1]

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AOpenAi

BOpenAI

CopenAI

Dopenai

Attempts:

3 left

💡 Hint

Common Mistakes

Using lowercase or incorrect capitalization causes import errors.

Trying to import a non-existent class name.

The correct class name is OpenAI with capital O and AI.

4fill in blank

hard

Fill both blanks to create an LLMChain with an OpenAI LLM and a prompt.

LangChain

llm = [1]()
chain = LLMChain(llm=[2], prompt=prompt)

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AOpenAI

Bllm

COpenAI()

Dprompt

Attempts:

3 left

💡 Hint

Common Mistakes

Passing the class name instead of the instance.

Using the prompt variable in place of the llm parameter.

You create an OpenAI instance with OpenAI() and pass it as llm to the chain.

5fill in blank

hard

Fill all three blanks to run the chain and print the output.

LangChain

output = chain.[1]([2])
print(output[[3]])

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Ainvoke

B{"input": "Hello"}

C"text"

Dexecute

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'execute' instead of 'invoke' causes errors.

Passing a string instead of a dictionary as input.

Trying to print the whole output object instead of its text.

You run the chain with invoke, passing a dictionary input, then print the text key of the output.