Iterator Objects¶
Python provides two general-purpose iterator objects. The first, a sequence
iterator, works with an arbitrary sequence supporting the __getitem__()
method. The second works with a callable object and a sentinel value, calling
the callable for each item in the sequence, and ending the iteration when the
sentinel value is returned.
-
PyTypeObject PySeqIter_Type¶
- Part of the Stable ABI.
Type object for iterator objects returned by PySeqIter_New() and the
one-argument form of the iter() built-in function for built-in sequence
types.
-
int PySeqIter_Check(PyObject *op)¶
Return true if the type of op is PySeqIter_Type. This function
always succeeds.
-
PyObject *PySeqIter_New(PyObject *seq)¶
- Return value: New reference. Part of the Stable ABI.
Return an iterator that works with a general sequence object, seq. The
iteration ends when the sequence raises IndexError for the subscripting
operation.
-
PyTypeObject PyCallIter_Type¶
- Part of the Stable ABI.
Type object for iterator objects returned by PyCallIter_New() and the
two-argument form of the iter() built-in function.
-
int PyCallIter_Check(PyObject *op)¶
Return true if the type of op is PyCallIter_Type. This
function always succeeds.
-
PyObject *PyCallIter_New(PyObject *callable, PyObject *sentinel)¶
- Return value: New reference. Part of the Stable ABI.
Return a new iterator. The first parameter, callable, can be any Python
callable object that can be called with no parameters; each call to it should
return the next item in the iteration. When callable returns a value equal to
sentinel, the iteration will be terminated.
Range Objects¶
-
PyTypeObject PyRange_Type¶
- Part of the Stable ABI.
The type object for range objects.
-
int PyRange_Check(PyObject *o)¶
Return true if the object o is an instance of a range object.
This function always succeeds.
Builtin Iterator Types¶
These are built-in iteration types that are included in Python’s C API, but
provide no additional functions. They are here for completeness.
These pointers are part of the Stable ABI.
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Last updated on Nov 12, 2026 (16:03 UTC).
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