diff --git a/stdlib/public/Python/Python.swift b/stdlib/public/Python/Python.swift
index 3a4305e22a809..25cd2f63d5c7d 100644
--- a/stdlib/public/Python/Python.swift
+++ b/stdlib/public/Python/Python.swift
@@ -1257,6 +1257,29 @@ extension PythonObject : MutableCollection {
   }
 }
 
+extension PythonObject : Sequence {
+  public struct Iterator : IteratorProtocol {
+    fileprivate let pythonIterator: PythonObject
+
+    public func next() -> PythonObject? {
+      guard let result = PyIter_Next(self.pythonIterator.borrowedPyObject) else {
+        try! throwPythonErrorIfPresent()
+        return nil
+      }
+      return PythonObject(consuming: result)
+    }
+  }
+
+  public func makeIterator() -> Iterator {
+    guard let result = PyObject_GetIter(borrowedPyObject) else {
+      try! throwPythonErrorIfPresent()
+      // Unreachable. A Python `TypeError` must have been thrown.
+      preconditionFailure()
+    }
+    return Iterator(pythonIterator: PythonObject(consuming: result))
+  }
+}
+
 //===----------------------------------------------------------------------===//
 // `ExpressibleByLiteral` conformances
 //===----------------------------------------------------------------------===//
diff --git a/stdlib/public/Python/PythonLibrary+Symbols.swift b/stdlib/public/Python/PythonLibrary+Symbols.swift
index 22e334e6ca76b..1c3d590ee0df9 100644
--- a/stdlib/public/Python/PythonLibrary+Symbols.swift
+++ b/stdlib/public/Python/PythonLibrary+Symbols.swift
@@ -123,6 +123,14 @@ let PyDict_Next: @convention(c) (
   UnsafeMutablePointer<PyObjectPointer?>) -> Int32 =
   PythonLibrary.loadSymbol(name: "PyDict_Next")
 
+let PyIter_Next: @convention(c) (
+  PyObjectPointer) -> PyObjectPointer? =
+  PythonLibrary.loadSymbol(name: "PyIter_Next")
+
+let PyObject_GetIter: @convention(c) (
+  PyObjectPointer) -> PyObjectPointer? =
+  PythonLibrary.loadSymbol(name: "PyObject_GetIter")
+
 let PyList_New: @convention(c) (Int) -> PyObjectPointer? =
   PythonLibrary.loadSymbol(name: "PyList_New")
 
diff --git a/test/Python/python_runtime.swift b/test/Python/python_runtime.swift
index 1bf91712608d2..4e6d7e7d1101f 100644
--- a/test/Python/python_runtime.swift
+++ b/test/Python/python_runtime.swift
@@ -77,6 +77,14 @@ PythonRuntimeTestSuite.testWithLeakChecking("PythonDict") {
   expectEqual("d", dict["b"])
 }
 
+PythonRuntimeTestSuite.testWithLeakChecking("Iterator") {
+  var sum = PythonObject(0)
+  for v in Python.iter([1, 2, 3]) {
+    sum += v
+  }
+  expectEqual(6, sum)
+}
+
 PythonRuntimeTestSuite.testWithLeakChecking("Range") {
   let slice = PythonObject(5..<10)
   expectEqual(Python.slice(5, 10), slice)