How can you combine CommaSeparatedListOutputParser with a custom function to convert all parsed items to uppercase?

hard📝 Application Q9 of 15

LangChain - Output Parsers

How can you combine CommaSeparatedListOutputParser with a custom function to convert all parsed items to uppercase?

AParse the list then map str.upper to each item

BPass a parameter to parse() to uppercase items

COverride parse method to uppercase inside parser

DUse a different parser that returns uppercase

Step-by-Step Solution

Solution:

Step 1: Understand parser output
The parser returns a list of strings.
Step 2: Apply custom function after parsing
Use Python's map or list comprehension to convert each item to uppercase after parsing.
Final Answer:
Parse the list then map str.upper to each item -> Option A
Quick Check:
Post-process parsed list for uppercase [OK]

Quick Trick: Apply transformations after parsing, not inside parser [OK]

Common Mistakes:

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