UserWarning — Easy Examples

Default category for warnings issued by the user

EasyIntermediateAdvancedExpert

Triggering UserWarning

How UserWarning is raised and how to catch it.

python
# Triggering and catching UserWarning
try:
    import warnings; warnings.warn("user warning", UserWarning)
except UserWarning as e:
    print(f"Caught UserWarning: {e}")
    print(f"Type: {type(e).__name__}")

UserWarning is raised when default category for warnings issued by the user. Always catch specific exceptions rather than bare except clauses.

Handling UserWarning

Basic error handling pattern for UserWarning.

python
# Safe handling pattern
def safe_operation():
    try:
        import warnings; warnings.warn("user warning", UserWarning)
    except UserWarning:
        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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