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array setitem functionality

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Joachim Schöberl 2019-09-06 17:17:04 +02:00
parent 9dca7e631d
commit be40a4d3f1
1 changed files with 24 additions and 0 deletions
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24
libsrc/core/python_ngcore.hpp
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@ -47,6 +47,30 @@ namespace ngcore
return self[i]; return self[i];
}, },
py::return_value_policy::reference) py::return_value_policy::reference)
.def ("__setitem__",
[](TFlat & self, TIND i, T val) -> T&
{
static constexpr int base = IndexBASE<TIND>();
if (i < base || i >= self.Size()+base)
throw py::index_error();
self[i] = val;
return self[i];
},
py::return_value_policy::reference)
.def ("__setitem__",
[](TFlat & self, py::slice slice, T val)
{
size_t start, stop, step, slicelength;
if (!slice.compute(self.Size(), &start, &stop, &step, &slicelength))
throw py::error_already_set();
static constexpr int base = IndexBASE<TIND>();
if (start < base || start+slicelength*step >= self.Size()+base)
throw py::index_error();
for (size_t i = 0; i < slicelength; i++, start+=step)
self[start] = val;
})
.def("__iter__", [] ( TFlat & self) { .def("__iter__", [] ( TFlat & self) {
return py::make_iterator (self.begin(),self.end()); return py::make_iterator (self.begin(),self.end());
}, py::keep_alive<0,1>()) // keep array alive while iterator is used }, py::keep_alive<0,1>()) // keep array alive while iterator is used