How to use the pykeepass.kdbx_parsing.common.DynamicDict function in pykeepass

}
    ),
    "data" / Prefixed(
        Int32ul,
        Switch(
            this.id,
            {'compression_flags': CompressionFlags,
             'kdf_parameters': VariantDictionary,
             'cipher_id': CipherId
             },
            default=GreedyBytes
        )
    )
)

DynamicHeader = DynamicDict(
    'id',
    RepeatUntil(
        lambda item, a, b: item.id == 'end',
        DynamicHeaderItem
    )
)


# -------------------- Payload Verification --------------------
def compute_payload_block_hash(this):
    """Compute hash of each payload block.
    Used to prevent payload corruption and tampering."""

    return hmac.new(
        hashlib.sha512(
            struct.pack('

'protected_stream_key': 0x02,
         'binary': 0x03
         }
    ),
    "data" / Prefixed(
        Int32ul,
        Switch(
            this.type,
            {'protected_stream_id': ProtectedStreamId},
            default=GreedyBytes
        )
    )
)

# another binary header inside decrypted and decompressed Payload
InnerHeader = DynamicDict(
    'type',
    RepeatUntil(lambda item, a, b: item.type == 'end', InnerHeaderItem),
    # FIXME - this is a hack because inner header is not truly a dict,
    #  it has multiple binary elements.
    lump=['binary']
)

UnpackedPayload = Reparsed(
    Struct(
        "inner_header" / InnerHeader,
        "xml" / Unprotect(
            this.inner_header.protected_stream_id.data,
            this.inner_header.protected_stream_key.data,
            XML(GreedyBytes)
        )
    )

def __init__(self, key, subcon, lump=[]):
        super(DynamicDict, self).__init__(subcon)
        self.key = key
        self.lump = lump

0x05: Int64ul,
             0x08: Flag,
             0x0C: Int32sl,
             0x0D: Int64sl,
             0x42: GreedyBytes,
             0x18: GreedyString('utf-8')
             }
        )
    ),
    "next_byte" / Peek(Byte)
)

# new dynamic dictionary structure added in KDBX4
VariantDictionary = Struct(
    "version" / Bytes(2),
    "dict" / DynamicDict(
        'key',
        RepeatUntil(
            lambda item, a, b: item.next_byte == 0x00,
            VariantDictionaryItem
        )
    ),
    Padding(1) * "null padding"
)

# -------------------- Dynamic Header --------------------

# https://github.com/dlech/KeePass2.x/blob/dbb9d60095ef39e6abc95d708fb7d03ce5ae865e/KeePassLib/Serialization/KdbxFile.cs#L234-L246

DynamicHeaderItem = Struct(
    "id" / Mapping(
        Byte,

),
    "data" / Prefixed(
        Int16ul,
        Switch(
            this.id,
            {'compression_flags': CompressionFlags,
             'cipher_id': CipherId,
             'transform_rounds': Int32ul,
             'protected_stream_id': ProtectedStreamId
             },
            default=GreedyBytes
        )
    ),
)

DynamicHeader = DynamicDict(
    'id',
    RepeatUntil(
        lambda item, a, b: item.id == 'end',
        DynamicHeaderItem
    )
)

# -------------------- Payload Verification --------------------

# encrypted payload is split into multiple data blocks with hashes
PayloadBlock = Struct(
    "block_index" / Checksum(
        Int32ul,
        lambda this: this._index,
        this
    ),