From 3905e7e64059b45479894ba1fdfb0ef9cef64475 Mon Sep 17 00:00:00 2001
From: James Taylor <user234683@users.noreply.github.com>
Date: Sat, 16 Feb 2019 23:41:52 -0800
Subject: basic subscriptions system

---
 python/attr/exceptions.py | 57 +++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 57 insertions(+)
 create mode 100644 python/attr/exceptions.py

(limited to 'python/attr/exceptions.py')

diff --git a/python/attr/exceptions.py b/python/attr/exceptions.py
new file mode 100644
index 0000000..b12e41e
--- /dev/null
+++ b/python/attr/exceptions.py
@@ -0,0 +1,57 @@
+from __future__ import absolute_import, division, print_function
+
+
+class FrozenInstanceError(AttributeError):
+    """
+    A frozen/immutable instance has been attempted to be modified.
+
+    It mirrors the behavior of ``namedtuples`` by using the same error message
+    and subclassing :exc:`AttributeError`.
+
+    .. versionadded:: 16.1.0
+    """
+
+    msg = "can't set attribute"
+    args = [msg]
+
+
+class AttrsAttributeNotFoundError(ValueError):
+    """
+    An ``attrs`` function couldn't find an attribute that the user asked for.
+
+    .. versionadded:: 16.2.0
+    """
+
+
+class NotAnAttrsClassError(ValueError):
+    """
+    A non-``attrs`` class has been passed into an ``attrs`` function.
+
+    .. versionadded:: 16.2.0
+    """
+
+
+class DefaultAlreadySetError(RuntimeError):
+    """
+    A default has been set using ``attr.ib()`` and is attempted to be reset
+    using the decorator.
+
+    .. versionadded:: 17.1.0
+    """
+
+
+class UnannotatedAttributeError(RuntimeError):
+    """
+    A class with ``auto_attribs=True`` has an ``attr.ib()`` without a type
+    annotation.
+
+    .. versionadded:: 17.3.0
+    """
+
+
+class PythonTooOldError(RuntimeError):
+    """
+    An ``attrs`` feature requiring a more recent python version has been used.
+
+    .. versionadded:: 18.2.0
+    """
-- 
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