Slice Objects

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

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

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 with an exception set if the new object could not be allocated.

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.

3.2 The parameter type for the slice parameter was PySliceObject* before.

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. length must not be negative.

Return 0 on success and -1 on error with an exception set.

[!NOTE] This function is considered not safe for resizable sequences. Its invocation should be replaced by a combination of PySlice_Unpack and PySlice_AdjustIndices where :

if (PySlice_GetIndicesEx(slice, length, &start, &stop, &step, &slicelength) < 0) {
// return error

}

is replaced by :

if (PySlice_Unpack(slice, &start, &stop, &step) < 0) {
// return error

} slicelength = PySlice_AdjustIndices(length, &start, &stop, step);

3.2 The parameter type for the slice parameter was PySliceObject* before.

3.6.1 If Py_LIMITED_API is not set or set to the value between 0x03050400 and 0x03060000 (not including) or 0x03060100 or higher !PySlice_GetIndicesEx is implemented as a macro using !PySlice_Unpack and !PySlice_AdjustIndices. Arguments start, stop and step are evaluated more than once.

3.6.1 If Py_LIMITED_API is set to the value less than 0x03050400 or between 0x03060000 and 0x03060100 (not including) !PySlice_GetIndicesEx is a deprecated function.

Extract the start, stop and step data members from a slice object as C integers. Silently reduce values larger than PY_SSIZE_T_MAX to PY_SSIZE_T_MAX, silently boost the start and stop values less than PY_SSIZE_T_MIN to PY_SSIZE_T_MIN, and silently boost the step values less than -PY_SSIZE_T_MAX to -PY_SSIZE_T_MAX.

Return -1 with an exception set on error, 0 on success.

3.6.1

Adjust start/end slice indices assuming a sequence of the specified length. Out of bounds indices are clipped in a manner consistent with the handling of normal slices.

length must not be negative. step must not be zero and must not be less than -PY_SSIZE_T_MAX, as guaranteed by PySlice_Unpack.

Return the length of the slice. Always successful. Doesn't call Python code.

3.6.1

Ellipsis Object

The type of Python Ellipsis object. Same as types.EllipsisType in the Python layer.

The Python Ellipsis object. This object has no methods. Like Py_None, it is an immortal singleton object.

3.12 Py_Ellipsis is immortal.