Function RequireGroup

Wrapping/Python/mitk/MultiLabelSegmentation.cpp:219–223

A group index is positional (list-like) -> IndexError; a label value is a sparse key (dict-like) -> KeyError. Both subclass Python's LookupError, so callers can catch any miss uniformly.

// sparse key (dict-like) -> KeyError. Both subclass Python's LookupError, so
// callers can catch any miss uniformly.
void RequireGroup(const MultiLabelSegmentation& seg, MultiLabelSegmentation::GroupIndexType index)
{
  if (!seg.ExistGroup(index))
    throw py::index_error("Group index " + std::to_string(index) + " does not exist");
}

void RequireLabel(const MultiLabelSegmentation& seg, Label::PixelType value)
{