RandomX API example (Python port): https://github.com/tevador/RandomX/blob/v1.1.8/src/tests/api-example1.c

api-example1.py

# A Python port of:
#   https://github.com/tevador/RandomX/blob/v1.1.8/src/tests/api-example1.c
#
# You can build librandomx.{so,dylib} by the following command:
#   cmake -DARCH=native -DBUILD_SHARED_LIBS=ON
from ctypes import *
from ctypes.util import find_library

librandomx = cdll.LoadLibrary(find_library('librandomx'))

randomx_get_flags = librandomx.randomx_get_flags
randomx_get_flags.argtypes = []
randomx_get_flags.restype = c_int

randomx_alloc_cache = librandomx.randomx_alloc_cache
randomx_alloc_cache.argtypes = [c_int]
randomx_alloc_cache.restype = c_void_p

randomx_release_cache = librandomx.randomx_release_cache
randomx_release_cache.argtypes = [c_void_p]
randomx_release_cache.restype = None

randomx_init_cache = librandomx.randomx_init_cache
randomx_init_cache.argtypes = [c_void_p, c_void_p, c_size_t]
randomx_init_cache.restype = None

randomx_create_vm = librandomx.randomx_create_vm
randomx_create_vm.argtypes = [c_int, c_void_p, c_void_p]
randomx_create_vm.restype = c_void_p

randomx_destroy_vm = librandomx.randomx_destroy_vm
randomx_destroy_vm.argtypes = [c_void_p]
randomx_destroy_vm.restype = None

randomx_calculate_hash = librandomx.randomx_calculate_hash
randomx_calculate_hash.argtypes = [c_void_p, c_void_p, c_size_t, c_void_p]
randomx_calculate_hash.restype = None

my_key = create_string_buffer(b'RandomX example key')
my_input = create_string_buffer(b"RandomX example input")
hash = create_string_buffer(32)

flags = randomx_get_flags()
my_cache = randomx_alloc_cache(flags)
assert my_cache is not None
try:
    randomx_init_cache(my_cache, addressof(my_key), sizeof(my_key))
    my_machine = randomx_create_vm(flags, my_cache, None)
    assert my_machine is not None
    try:
        randomx_calculate_hash(
            my_machine,
            addressof(my_input),
            sizeof(my_input),
            hash
        )
    finally:
        randomx_destroy_vm(my_machine)
finally:
    randomx_release_cache(my_cache)

print(hash.raw.hex())