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import re
class Error(StandardError):
"""Base error class.
Child classes should define an HTTP status code, title, and a doc string.
"""
code = None
title = None
def __init__(self, message=None, **kwargs):
"""Use the doc string as the error message by default."""
message = message or self.__doc__ % kwargs
super(Error, self).__init__(message)
def __str__(self):
"""Cleans up line breaks and indentation from doc strings."""
string = super(Error, self).__str__()
string = re.sub('[ \n]+', ' ', string)
string = string.strip()
return string
class ValidationError(Error):
"""Expecting to find %(attribute)s in %(target)s.
The server could not comply with the request since it is either malformed
or otherwise incorrect.
The client is assumed to be in error.
"""
code = 400
title = 'Bad Request'
class Unauthorized(Error):
"""The request you have made requires authentication."""
code = 401
title = 'Not Authorized'
class Forbidden(Error):
"""You are not authorized to perform the requested action: %(action)s"""
code = 403
title = 'Not Authorized'
class NotFound(Error):
"""Could not find: %(target)s"""
code = 404
title = 'Not Found'
class TokenNotFound(NotFound):
"""Could not find token: %(token_id)s"""
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