diff --git a/py/set.go b/py/set.go
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+/*
+ * Copyright (c) 2024 The GoPlus Authors (goplus.org). All rights reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package py
+
+import (
+	_ "unsafe"
+)
+
+// https://docs.python.org/3/c-api/set.html
+
+// Return a new set containing objects returned by the iterable. The iterable
+// may be nil to create a new empty set. Return the new set on success or nil
+// on failure. set a TypeError exception if iterable is not actually iterable.
+// The constructor is also useful for copying a set (c=set(s)).
+//
+//go:linkname NewSet C.PySet_New
+func NewSet(iterable *Object) *Object { return nil }
+
+// Return the length of a set or frozenset object. Equivalent to len(anyset).
+// Set a SystemError if anyset is not a set, frozenset, or an instance of a
+// subtype.
+//
+// llgo:link (*Object).SetLen C.PySet_Size
+func (s *Object) SetLen() int { return 0 }
+
+// Return 1 if found, 0 if not found, and -1 if an error is encountered.
+// Unlike the Python __contains__() method, this function does not automatically
+// convert unhashable sets into temporary frozensets. Set a TypeError if the key
+// is unhashable. Set SystemError if s is not a set, frozenset, or an instance
+// of a subtype.
+//
+// llgo:link (*Object).SetContains C.PySet_Contains
+func (s *Object) SetContains(key *Object) int { return 0 }
+
+// Add key to a set instance. Also works with frozenset instances (like
+// PyTuple_SetItem() it can be used to fill in the values of brand new
+// frozensets before they are exposed to other code). Return 0 on success or -1
+// on failure. Set a TypeError if the key is unhashable. Set a MemoryError if
+// there is no room to grow. Set a SystemError if set is not an instance of set
+// or its subtype.
+//
+// llgo:link (*Object).SetAdd C.PySet_Add
+func (s *Object) SetAdd(key *Object) int { return 0 }
+
+// Return a new reference to an arbitrary object in the set, and removes the
+// object from the set. Return nil on failure. Set KeyError if the set is empty.
+// Set a SystemError if set is not an instance of set or its subtype.
+//
+// llgo:link (*Object).SetPop C.PySet_Pop
+func (s *Object) SetPop() *Object { return nil }
+
+// Empty an existing set of all elements. Return 0 on success. Return -1 and
+// set SystemError if set is not an instance of set or its subtype.
+//
+// llgo:link (*Object).SetClear C.PySet_Clear
+func (s *Object) SetClear() *Object { return nil }