# Generator Objects

Generator objects are what Python uses to implement generator iterators. They are normally created by iterating over a function that yields values, rather than explicitly calling `PyGen_New()` or `PyGen_NewWithQualName()`.

type PyGenObject

  The C structure used for generator objects.

PyTypeObject PyGen_Type

  The type object corresponding to generator objects.

int PyGen_Check(PyObject *ob)

  Return true if ob is a generator object; ob must not be `NULL`. This function always succeeds.

int PyGen_CheckExact(PyObject *ob)

  Return true if ob’s type is `PyGen_Type`; ob must not be `NULL`. This function always succeeds.

PyObject *PyGen_New(PyFrameObject *frame)
  Return value: New reference.

  Create and return a new generator object based on the frame object. A reference to frame is “stolen” by this function (even on error). The argument must not be `NULL`.

PyObject *PyGen_NewWithQualName(PyFrameObject *frame, PyObject *name, PyObject *qualname)
  Return value: New reference.

  Create and return a new generator object based on the frame object, with `__name__` and `__qualname__` set to name and qualname. A reference to frame is “stolen” by this function (even on error). The frame argument must not be `NULL`.

PyCodeObject *PyGen_GetCode(PyGenObject *gen)

  Return a new strong reference to the code object wrapped by gen. This function always succeeds.

## Asynchronous Generator Objects

See also

PEP 525

PyTypeObject PyAsyncGen_Type

  The type object corresponding to asynchronous generator objects. This is available as `types.AsyncGeneratorType` in the Python layer.

  Added in version 3.6.

PyObject *PyAsyncGen_New(PyFrameObject *frame, PyObject *name, PyObject *qualname)

  Create a new asynchronous generator wrapping frame, with `__name__` and `__qualname__` set to name and qualname. frame is “stolen” by this function (even on error) and must not be `NULL`.

  On success, this function returns a strong reference to the new asynchronous generator. On failure, this function returns `NULL` with an exception set.

  Added in version 3.6.

int PyAsyncGen_CheckExact(PyObject *op)

  Return true if op is an asynchronous generator object, false otherwise. This function always succeeds.

  Added in version 3.6.

## Deprecated API

PyAsyncGenASend_CheckExact(op)

  This is an API that was included in Python’s C API by mistake.

  It is solely here for completeness; do not use this API.

  Soft deprecated since version 3.14.