ValueError — Easy Examples

Raised when a function receives an argument of the right type but wrong value

EasyIntermediateAdvancedExpert

Triggering ValueError

How ValueError is raised and how to catch it.

python
# Triggering and catching ValueError
try:
    int("not_a_number")
except ValueError as e:
    print(f"Caught ValueError: {e}")
    print(f"Type: {type(e).__name__}")

ValueError is raised when raised when a function receives an argument of the right type but wrong value. Always catch specific exceptions rather than bare except clauses.

Handling ValueError

Basic error handling pattern for ValueError.

python
# Safe handling pattern
def safe_operation():
    try:
        int("not_a_number")
    except ValueError:
        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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