LookupError — Easy Examples

Base class for lookup errors (KeyError, IndexError)

EasyIntermediateAdvancedExpert

Triggering LookupError

How LookupError is raised and how to catch it.

python
# Triggering and catching LookupError
try:
    raise LookupError("lookup failed")
except LookupError as e:
    print(f"Caught LookupError: {e}")
    print(f"Type: {type(e).__name__}")

LookupError is raised when base class for lookup errors (keyerror, indexerror). Always catch specific exceptions rather than bare except clauses.

Handling LookupError

Basic error handling pattern for LookupError.

python
# Safe handling pattern
def safe_operation():
    try:
        raise LookupError("lookup failed")
    except LookupError:
        print("Operation failed gracefully")
        return None

result = safe_operation()
print(f"Result: {result}")

Wrapping risky operations in try/except blocks prevents your program from crashing.

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