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Given this code snippet, what will be the output if parsing fails?

medium📝 component behavior Q13 of 15
LangChain - Output Parsers
Given this code snippet, what will be the output if parsing fails?
try:
  result = parser.parse(data)
except ParseError:
  result = "Error: Invalid data"
print(result)
AThe original data is printed
BThe program crashes with an exception
CNone
D"Error: Invalid data"
Step-by-Step Solution
Solution:
  1. Step 1: Understand try-except behavior on parsing failure

    If parser.parse(data) raises ParseError, the except block runs and sets result to the error message.
  2. Step 2: Output printed after exception handling

    Since exception is caught, print(result) outputs the error message string.
  3. Final Answer:

    "Error: Invalid data" -> Option D
  4. Quick Check:

    Exception caught sets result to error message [OK]
Quick Trick: If exception caught, output error message assigned in except [OK]
Common Mistakes:
  • Assuming program crashes despite try-except
  • Expecting None instead of error message
  • Thinking original data prints on failure

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