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"""!
@brief CCORE Wrapper for K-Medians algorithm.
@authors Andrei Novikov (pyclustering@yandex.ru)
@date 2014-2020
@copyright BSD-3-Clause
"""
from ctypes import c_double, c_size_t, POINTER
from pyclustering.core.wrapper import ccore_library
from pyclustering.core.pyclustering_package import pyclustering_package, package_extractor, package_builder
def kmedians(sample, centers, tolerance, itermax, metric_pointer):
pointer_data = package_builder(sample, c_double).create()
pointer_centers = package_builder(centers, c_double).create()
ccore = ccore_library.get()
ccore.kmedians_algorithm.restype = POINTER(pyclustering_package)
package = ccore.kmedians_algorithm(pointer_data, pointer_centers, c_double(tolerance), c_size_t(itermax), metric_pointer)
result = package_extractor(package).extract()
ccore.free_pyclustering_package(package)
return result[0], result[1]
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