Why templates create reusable prompts in LangChain - Test Your Understanding

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'

Aage

Bname

Clocation

Dgreeting

Attempts:

3 left

💡 Hint

Common Mistakes

Using a placeholder that is not listed in input_variables.

Mismatching the placeholder name and input variable.

The variable placeholder in the template must match the input variable name, which is 'name' here.

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'

Aname

Bage

Clocation

Dgreeting

Attempts:

3 left

💡 Hint

Common Mistakes

Using a variable name not defined in the template.

Passing the value without specifying the variable name.

The format method requires the variable name 'name' to replace the placeholder in the template.

3fill in blank

hard

Fix the error in the code by choosing the correct input variable name for the template.

LangChain

prompt = PromptTemplate(template="Your favorite color is [1].", input_variables=["color"])

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

Acolour

BfavColor

Cfavorite_color

Dcolor

Attempts:

3 left

💡 Hint

Common Mistakes

Using British spelling 'colour' instead of 'color'.

Using camelCase or different variable names.

The placeholder and input variable must match exactly; 'color' is correct here.

4fill in blank

hard

Fill both blanks to create a prompt template with two variables and format it correctly.

LangChain

prompt = PromptTemplate(template="Hello, [1]! You are [2] years old.", input_variables=["name", "age"])
formatted = prompt.format([1]="Bob", [2]=30)

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

Aname

Bage

Cusername

Dyears

Attempts:

3 left

💡 Hint

Common Mistakes

Mixing variable names between template and format method.

Using variables not declared in input_variables.

The placeholders and input variables must match: 'name' and 'age' are correct.

5fill in blank

hard

Fill all three blanks to create a reusable prompt template with three variables and format it with values.

LangChain

prompt = PromptTemplate(template="Dear [1], your order [2] will arrive on [3].", input_variables=["customer", "order_id", "delivery_date"])
message = prompt.format([1]="Anna", [2]="12345", [3]="Monday")

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

Acustomer

Border_id

Cdelivery_date

Darrival_time

Attempts:

3 left

💡 Hint

Common Mistakes

Using variable names not declared in input_variables.

Mismatching placeholder names and format keys.

The placeholders and input variables must match exactly: 'customer', 'order_id', and 'delivery_date'.