Python 3.6.5 Documentation >  Slice Objects

Slice Objects
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PyTypeObject PySlice_Type

The type object for slice objects. This is the same as "slice" in
the Python layer.

int PySlice_Check(PyObject *ob)

Return true if *ob* is a slice object; *ob* must not be *NULL*.

PyObject* PySlice_New(PyObject *start, PyObject *stop, PyObject *step)
*Return value: New reference.*

Return a new slice object with the given values. The *start*,
*stop*, and *step* parameters are used as the values of the slice
object attributes of the same names. Any of the values may be
*NULL*, in which case the "None" will be used for the corresponding
attribute. Return *NULL* if the new object could not be allocated.

int PySlice_GetIndices(PyObject *slice, Py_ssize_t length, Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step)

Retrieve the start, stop and step indices from the slice object
*slice*, assuming a sequence of length *length*. Treats indices
greater than *length* as errors.

Returns "0" on success and "-1" on error with no exception set
(unless one of the indices was not "None" and failed to be
converted to an integer, in which case "-1" is returned with an
exception set).

You probably do not want to use this function.

Changed in version 3.2: The parameter type for the *slice*
parameter was "PySliceObject*" before.

int PySlice_GetIndicesEx(PyObject *slice, Py_ssize_t length, Py_ssize_t *start, Py_ssize_t *stop, Py_ssize_t *step, Py_ssize_t *slicelength)

Usable replacement for "PySlice_GetIndices()". Retrieve the start,
stop, and step indices from the slice object *slice* assuming a
sequence of length *length*, and store the length of the slice in
*slicelength*. Out of bounds indices are clipped in a manner
consistent with the handling of normal slices.

Returns "0" on success and "-1" on error with exception set.

Changed in version 3.2: The parameter type for the *slice*
parameter was "PySliceObject*" before.

Ellipsis Object
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PyObject *Py_Ellipsis

The Python "Ellipsis" object. This object has no methods. It
needs to be treated just like any other object with respect to
reference counts. Like "Py_None" it is a singleton object.