You want to create a prompt that greets a user and mentions their favorite color using Langchain. Which code correctly formats and injects the context for user_name = "Bob" and color = "blue"?
hard📝 Application Q15 of 15
LangChain - RAG Chain Construction
You want to create a prompt that greets a user and mentions their favorite color using Langchain. Which code correctly formats and injects the context for user_name = "Bob" and color = "blue"?
Atemplate = "Hi {user_name}, your favorite color is {color}."
prompt = template.format(user_name=user_name, color=color)
Btemplate = "Hi {user}, your favorite color is {color}."
prompt = template.format(user_name=user_name, color=color)
Ctemplate = "Hi {user_name}, your favorite color is {color}."
prompt = template.format(user=user_name, color=color)
Dtemplate = "Hi {user_name}, your favorite color is {color}."
prompt = template.fill(user_name, color)
Step-by-Step Solution
Solution:
Step 1: Match placeholders with variable names
The template uses placeholders {user_name} and {color}, so format() must use these exact names.
Step 2: Check format() arguments
template = "Hi {user_name}, your favorite color is {color}."
prompt = template.format(user_name=user_name, color=color) correctly passes named arguments matching placeholders: user_name=user_name, color=color.
Step 3: Eliminate incorrect options
template = "Hi {user}, your favorite color is {color}."
prompt = template.format(user_name=user_name, color=color) uses {user} placeholder mismatching the user_name= argument. template = "Hi {user_name}, your favorite color is {color}."
prompt = template.format(user=user_name, color=color) mismatches placeholder and argument names. template = "Hi {user_name}, your favorite color is {color}."
prompt = template.fill(user_name, color) uses non-existent fill() method.
Final Answer:
template = "Hi {user_name}, your favorite color is {color}."
prompt = template.format(user_name=user_name, color=color) -> Option A
Quick Check:
Placeholder names must match format() argument names [OK]
Quick Trick:Keep placeholder and format() argument names identical [OK]
Common Mistakes:
Mismatching placeholder and argument names
Using wrong method like fill()
Ignoring placeholder names in template
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