pickle 后文件大小急剧增加

Question

我正在读取文件并将数据（加密后）发送到字典，并包含加密前后数据的哈希值。然后我对字典进行了pickle，但发现文件大小与源文件大小相比很大。如果我将加密数据直接写入文件，则大小与源相同。知道为什么我的腌制文件这么大吗？

#Encrypt data and get hashes        
def encryptAndExportFile(self, key, inFile, outFile):

    openInFile = open(inFile,"rb")
    inFileSize = os.path.getsize(inFile)
    inFileData = openInFile.readlines()
    openInFile.close()

    """ initialise cipher """

    cipher = AES.new(key, AES.MODE_CFB)

    """ initialise MD5 """

    m = hashlib.md5() #hash
    h = hashlib.md5() #hash of encrypted dataq

    encryptedData = []

    for data in inFileData:

        m.update(data) 
        encData = cipher.encrypt(data)
        h.update(encData)
        encryptedData.append(encData)


    hashResult = m.digest()
    encHashResult = h.digest()

    return hashResult, encryptedData, encHashResult

def storeEncryptedObject(self, obj, path):

    outFile = open(path, 'wb')
    pickle.dump(obj, outFile)
    outFile.close()

Answer 1

尝试通过指定 protocol=2 作为 pickle.dump 的关键字参数来使用二进制 pickle。它应该更有效率。