ModuleNotFoundError — Advanced Playground

Subclass of ImportError; raised when a module cannot be located

Python Playground

# Custom exception hierarchy
class DetailedModuleNotFoundError(ModuleNotFoundError):
    def __init__(self, message, details=None):
        super().__init__(message)
        self.details = details or {}

    def __str__(self):
        base = super().__str__()
        if self.details:
            detail_str = ", ".join(f"{k}={v}" for k, v in self.details.items())
            return f"{base} [{detail_str}]"
        return base

try:
    raise DetailedModuleNotFoundError(
        "Something went wrong",
        {"code": 42, "source": "test"}
    )
except ModuleNotFoundError as e:
    print(f"Caught: {e}")
    if hasattr(e, 'details'):
        print(f"Details: {e.details}")

Output

Click "Run" to execute your code

Custom exception subclasses let you add context and structure to your error handling.

Challenge

Try modifying the code above to explore different behaviors. Can you extend the example to handle a new use case?

View all Advanced examples for ModuleNotFoundError