How to use the pymongocrypt.binding.lib.mongocrypt_init function in pymongocrypt

self.__crypt, binary_key.bin):
                    self.__raise_from_status()

        schema_map = self.__opts.schema_map
        if schema_map is not None:
            with MongoCryptBinaryIn(schema_map) as binary_schema_map:
                if not lib.mongocrypt_setopt_schema_map(
                        self.__crypt, binary_schema_map.bin):
                    self.__raise_from_status()

        if not lib.mongocrypt_setopt_crypto_hooks(
                self.__crypt, aes_256_cbc_encrypt, aes_256_cbc_decrypt,
                secure_random, hmac_sha_512, hmac_sha_256, sha_256, ffi.NULL):
            self.__raise_from_status()

        if not lib.mongocrypt_init(self.__crypt):
            self.__raise_from_status()