You receive the string 'apple, , banana, , cherry' from a language model output. How does CommaSeparatedListOutputParser handle the empty items when parsing this string?

hard📝 Application Q15 of 15

LangChain - Output Parsers

You receive the string 'apple, , banana, , cherry' from a language model output. How does CommaSeparatedListOutputParser handle the empty items when parsing this string?

AIt includes empty strings as list items

BIt raises an error due to empty items

CIt removes empty items and returns only non-empty trimmed items

DIt joins all items into one string ignoring commas

Step-by-Step Solution

Solution:

Step 1: Understand empty item handling
The parser splits the text by commas and trims whitespace from each item, including resulting empty strings.
Step 2: Apply to given string
Splits 'apple, , banana, , cherry' into parts that trim to ['apple', '', 'banana', '', 'cherry'].
Final Answer:
It includes empty strings as list items -> Option A
Quick Check:
Includes empty strings after trim = A [OK]

Quick Trick: Parser includes empty strings from consecutive commas after trimming [OK]

Common Mistakes:

Thinking it removes empty items
Believing it raises errors on empty items
Assuming it joins items into one string

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More LangChain Quizzes

You receive the string 'apple, , banana, , cherry' from a language model output. How does CommaSeparatedListOutputParser handle the empty items when parsing this string?

Step 1: Understand empty item handling

Step 2: Apply to given string

Final Answer:

Quick Check:

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