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Shared/lib/python3.4/site-packages/stdnum/exceptions.py

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+# exceptions.py - collection of stdnum exceptions
+# coding: utf-8
+#
+# Copyright (C) 2013 Arthur de Jong
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+# 02110-1301 USA
+
+"""Collection of exceptions.
+
+The validation functions of stdnum should raise one of the below exceptions
+when validation of the number fails.
+"""
+
+
+class ValidationError(Exception):
+    """Top-level error for validating numbers.
+
+    This exception should normally not be raised, only subclasses of this
+    exception."""
+
+    def __str__(self):
+        return getattr(self, 'message', '')
+
+
+class InvalidFormat(ValidationError):
+    """Something is wrong with the format of the number.
+
+    This generally means characters or delimiters that are not allowed are
+    part of the number or required parts are missing."""
+
+    message = 'The number has an invalid format.'
+
+
+class InvalidChecksum(ValidationError):
+    """The number's internal checksum or check digit does not match."""
+
+    message = "The number's checksum or check digit is invalid."
+
+
+class InvalidLength(InvalidFormat):
+    """The length of the number is wrong."""
+
+    message = 'The number has an invalid length.'
+
+
+class InvalidComponent(ValidationError):
+    """One of the parts of the number has an invalid reference.
+
+    Some part of the number refers to some external entity like a country
+    code, a date or a predefined collection of values. The number contains
+    some invalid reference."""
+
+    message = 'One of the parts of the number are invalid or unknown.'