ver_2.py 文件源码

def retrieve_vfp_memo(bytes, fielddef, memo, decoder):
    """
    Returns the block of data from a memo file
    """
    if memo is None:
        block = 0
    else:
        block = struct.unpack('<i', bytes)[0]
    if not block:
        cls =  fielddef[EMPTY]
        if cls is NoneType:
            return None
        return cls()
    data = memo.get_memo(block)
    if fielddef[FLAGS] & BINARY:
        return data
    return fielddef[CLASS](decoder(data)[0])