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Custom exception class for handling errors that occur during document processing operations.

Purpose

DocumentProcessingError is a specialized exception class that inherits from Python's base Exception class. It is designed to be raised when errors occur during document processing workflows, such as parsing, validation, conversion, or manipulation of documents. This custom exception allows for more granular error handling and provides a clear semantic meaning when document-related operations fail, making it easier to distinguish document processing errors from other types of exceptions in the application.

Source Code

class DocumentProcessingError(Exception):
    """Exception raised for errors during document processing."""
    pass

Parameters

Parameter Details

*args: Variable length argument list passed to the base Exception class. Typically includes an error message string describing what went wrong during document processing.

**kwargs: Arbitrary keyword arguments passed to the base Exception class for additional exception metadata.

Return Value

Instantiation returns a DocumentProcessingError exception object that can be raised and caught. When raised, it behaves like any Python exception, carrying the message and traceback information provided during instantiation.

Class Interface

Methods

Attributes

Required Imports

from CDocs.models.document import DocumentProcessingError

Usage Example

# Raising the exception
try:
    # Simulate document processing
    document_content = process_document('file.pdf')
    if not document_content:
        raise DocumentProcessingError('Failed to extract content from PDF document')
except DocumentProcessingError as e:
    print(f'Document processing failed: {e}')
    # Handle the error appropriately

# Using with custom error messages
def validate_document(doc):
    if doc is None:
        raise DocumentProcessingError('Document is None')
    if not doc.has_content():
        raise DocumentProcessingError('Document has no content')
    return True

# Catching specific document errors
try:
    result = validate_document(my_doc)
except DocumentProcessingError as e:
    logging.error(f'Validation error: {e}')
    # Perform cleanup or fallback logic
except Exception as e:
    logging.error(f'Unexpected error: {e}')

Best Practices

• Always provide a descriptive error message when raising this exception to help with debugging and error tracking
• Use this exception specifically for document processing errors to maintain clear separation of concerns in error handling
• Catch this exception at appropriate levels in your application to handle document processing failures gracefully
• Consider logging the exception details before re-raising or handling to maintain an audit trail
• When catching this exception, decide whether to recover, retry, or propagate the error based on the context
• This exception can be instantiated with a simple string message: DocumentProcessingError('error message')
• Can be used in conjunction with try-except blocks to provide specific error handling for document operations
• Since it inherits from Exception, it can be caught by generic Exception handlers, but should be caught specifically when document processing errors need special handling

Tags

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