# Source code for textblob.exceptions

    # -*- coding: utf-8 -*-

    MISSING_CORPUS_MESSAGE = """
    Looks like you are missing some required data for this feature.

    To download the necessary data, simply run

        python -m textblob.download_corpora

    or use the NLTK downloader to download the missing data: http://nltk.org/data.html
    If this doesn't fix the problem, file an issue at https://github.com/sloria/TextBlob/issues.
    """

    class TextBlobError(Exception):
        """A TextBlob-related error."""
        pass

    TextBlobException = TextBlobError  # Backwards compat

    class MissingCorpusError(TextBlobError):
        """Exception thrown when a user tries to use a feature that requires a
        dataset or model that the user does not have on their system.
        """

        def __init__(self, message=MISSING_CORPUS_MESSAGE, *args, **kwargs):
            super(MissingCorpusError, self).__init__(message, *args, **kwargs)

    MissingCorpusException = MissingCorpusError  # Backwards compat

    class DeprecationError(TextBlobError):
        """Raised when user uses a deprecated feature."""
        pass

    class TranslatorError(TextBlobError):
        """Raised when an error occurs during language translation or detection."""
        pass

    class FormatError(TextBlobError):
        """Raised if a data file with an unsupported format is passed to a classifier."""
        pass