Slice Objects
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PyTypeObject PySlice_Type
The type object for slice objects. This is the same as slice and
types.SliceType.
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int PySlice_Check(PyObject *ob)
- Return true if ob is a slice object; ob must not be NULL.
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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.
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int PySlice_GetIndices(PySliceObject *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. If you want to use slice objects
in versions of Python prior to 2.3, you would probably do well to incorporate
the source of PySlice_GetIndicesEx, suitably renamed, in the source of
your extension.
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int PySlice_GetIndicesEx(PySliceObject *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.
New in version 2.3.
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