1 files changed, 66 insertions, 0 deletions
diff --git a/third_party/python/attrs/attr/filters.py b/third_party/python/attrs/attr/filters.py
new file mode 100644
index 0000000000..a1e40c98db
--- /dev/null
+++ b/third_party/python/attrs/attr/filters.py
@@ -0,0 +1,66 @@
+# SPDX-License-Identifier: MIT
+
+"""
+Commonly useful filters for `attr.asdict`.
+"""
+
+from ._make import Attribute
+
+
+def _split_what(what):
+    """
+    Returns a tuple of `frozenset`s of classes and attributes.
+    """
+    return (
+        frozenset(cls for cls in what if isinstance(cls, type)),
+        frozenset(cls for cls in what if isinstance(cls, str)),
+        frozenset(cls for cls in what if isinstance(cls, Attribute)),
+    )
+
+
+def include(*what):
+    """
+    Include *what*.
+
+    :param what: What to include.
+    :type what: `list` of classes `type`, field names `str` or
+        `attrs.Attribute`\\ s
+
+    :rtype: `callable`
+
+    .. versionchanged:: 23.1.0 Accept strings with field names.
+    """
+    cls, names, attrs = _split_what(what)
+
+    def include_(attribute, value):
+        return (
+            value.__class__ in cls
+            or attribute.name in names
+            or attribute in attrs
+        )
+
+    return include_
+
+
+def exclude(*what):
+    """
+    Exclude *what*.
+
+    :param what: What to exclude.
+    :type what: `list` of classes `type`, field names `str` or
+        `attrs.Attribute`\\ s.
+
+    :rtype: `callable`
+
+    .. versionchanged:: 23.3.0 Accept field name string as input argument
+    """
+    cls, names, attrs = _split_what(what)
+
+    def exclude_(attribute, value):
+        return not (
+            value.__class__ in cls
+            or attribute.name in names
+            or attribute in attrs
+        )
+
+    return exclude_