1 files changed, 1 insertions, 77 deletions
diff --git a/jsonschema/validators.py b/jsonschema/validators.py
index 7044428..fab8201 100644
--- a/jsonschema/validators.py
+++ b/jsonschema/validators.py
@@ -1,6 +1,5 @@
 from __future__ import division, unicode_literals
 
-import collections
 import contextlib
 import json
 import numbers
@@ -15,6 +14,7 @@ from jsonschema.compat import (
     PY3, Sequence, urljoin, urlsplit, urldefrag, unquote, urlopen,
     str_types, int_types, iteritems,
 )
+from jsonschema.exceptions import ErrorTree  # For backwards compatibility
 from jsonschema.exceptions import RefResolutionError, SchemaError, UnknownType
 
 
@@ -379,82 +379,6 @@ class RefResolver(object):
         return result
 
 
-class ErrorTree(object):
-    """
-    ErrorTrees make it easier to check which validations failed.
-
-    """
-
-    _instance = _unset
-
-    def __init__(self, errors=()):
-        self.errors = {}
-        self._contents = collections.defaultdict(self.__class__)
-
-        for error in errors:
-            container = self
-            for element in error.path:
-                container = container[element]
-            container.errors[error.validator] = error
-
-            self._instance = error.instance
-
-    def __contains__(self, index):
-        """
-        Check whether ``instance[index]`` has any errors.
-
-        """
-
-        return index in self._contents
-
-    def __getitem__(self, index):
-        """
-        Retrieve the child tree one level down at the given ``index``.
-
-        If the index is not in the instance that this tree corresponds to and
-        is not known by this tree, whatever error would be raised by
-        ``instance.__getitem__`` will be propagated (usually this is some
-        subclass of :class:`LookupError`.
-
-        """
-
-        if self._instance is not _unset and index not in self:
-            self._instance[index]
-        return self._contents[index]
-
-    def __setitem__(self, index, value):
-        self._contents[index] = value
-
-    def __iter__(self):
-        """
-        Iterate (non-recursively) over the indices in the instance with errors.
-
-        """
-
-        return iter(self._contents)
-
-    def __len__(self):
-        """
-        Same as :attr:`total_errors`.
-
-        """
-
-        return self.total_errors
-
-    def __repr__(self):
-        return "<%s (%s total errors)>" % (self.__class__.__name__, len(self))
-
-    @property
-    def total_errors(self):
-        """
-        The total number of errors in the entire tree, including children.
-
-        """
-
-        child_errors = sum(len(tree) for _, tree in iteritems(self._contents))
-        return len(self.errors) + child_errors
-
-
 def validator_for(schema, default=_unset):
     if default is _unset:
         default = Draft4Validator