/usr/local/lib64/python3.6/site-packages/pyarrow/tests
Edit: /usr/local/lib64/python3.6/site-packages/pyarrow/tests/bound_function_visit_strings.pyx (2047B)
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# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License. You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing,
# software distributed under the License is distributed on an
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# KIND, either express or implied. See the License for the
# specific language governing permissions and limitations
# under the License.
# distutils: language=c++
# cython: language_level = 3
import pyarrow as pa
from pyarrow.lib cimport *
from pyarrow.lib import frombytes, tobytes
# basic test to roundtrip through a BoundFunction
ctypedef CStatus visit_string_cb(const c_string&)
cdef extern from * namespace "arrow::py" nogil:
"""
#include
#include
#include
#include "arrow/status.h"
namespace arrow {
namespace py {
Status VisitStrings(const std::vector& strs,
std::function cb) {
for (const std::string& str : strs) {
RETURN_NOT_OK(cb(str));
}
return Status::OK();
}
} // namespace py
} // namespace arrow
"""
cdef CStatus CVisitStrings" arrow::py::VisitStrings"(
vector[c_string], function[visit_string_cb])
cdef void _visit_strings_impl(py_cb, const c_string& s) except *:
py_cb(frombytes(s))
def _visit_strings(strings, cb):
cdef:
function[visit_string_cb] c_cb
vector[c_string] c_strings
c_cb = BindFunction[visit_string_cb](&_visit_strings_impl, cb)
for s in strings:
c_strings.push_back(tobytes(s))
check_status(CVisitStrings(c_strings, c_cb))