Context formatting and injection in LangChain - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to create a prompt template with a variable placeholder.

LangChain

from langchain import PromptTemplate

prompt = PromptTemplate(template="Hello, [1]!", input_variables=["name"])

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

Aname

Buser

Cinput

Dtext

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name in input_variables that does not match the placeholder.

Forgetting to include the variable in input_variables list.

The input variable name must match the placeholder in the template exactly, so 'name' is correct.

2fill in blank

medium

Complete the code to format the prompt with the variable 'name' set to 'Alice'.

LangChain

formatted_prompt = prompt.format([1]="Alice")

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

Auser

Bname

Cinput

Dtext

Attempts:

3 left

💡 Hint

Common Mistakes

Using a different variable name than defined in the template.

Passing the variable as a positional argument instead of keyword.

The format method requires the variable name matching the input_variables, which is 'name'.

3fill in blank

hard

Fix the error in the code to inject context into the prompt template.

LangChain

context = "You are a helpful assistant."
prompt = PromptTemplate(template="Context: [1]\nQuestion: {question}", input_variables=["context", "question"])

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

Atext

Bquestion

Ccontext

Dinput

Attempts:

3 left

💡 Hint

Common Mistakes

Using a placeholder that is not in input_variables.

Mixing curly braces syntax for placeholders.

The placeholder must match an input variable; here 'context' is correct to inject the context string.

4fill in blank

hard

Fill both blanks to create a prompt template that includes context and question variables.

LangChain

prompt = PromptTemplate(template="Context: [1]\nQuestion: [2]", input_variables=["context", "question"])

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

Acontext

Bquestion

Cinput

Dtext

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping the variable names in placeholders.

Using variable names not listed in input_variables.

The placeholders must match the input_variables 'context' and 'question' respectively.

5fill in blank

hard

Fill all three blanks to format the prompt with context and question values.

LangChain

formatted = prompt.format([1]="You are a bot.", [2]="What is AI?", [3]="ignored")

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

Acontext

Bquestion

Cextra

Dtext

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names not defined in the prompt template.

Passing positional arguments instead of keyword arguments.

The format method keys must match input_variables; 'context' and 'question' are used, 'extra' is an extra variable.