用python将base64解码成json文件。

Question

所以我试着压缩一个JSON文件，然后用这个方法解压。编码 (两个内置函数)压缩过程工作正常，但我不知道如何将其解压回JSON，这样我就可以附加更多的项目到它。这是我尝试过的。

path = r"mypath.json"

print(json_zip(path))
with open(path, "w") as f:
    json.dump(json_zip(path), f, ensure_ascii=False, indent=4)

with open(path, "r") as f:
    file_data = json.load(f)
print(json_unzip(file_data))

打印输出:

{'base64(zip(o))': 'eJwNyjEKgDAQBdGrLOn1AHYaUewEsftNiKuskawkInh7U80rxtgGWDOnDHTMSYBR9biY+iQvA4NEF31BN4sP5Voe9YGmuCuwObk+2tzjyOv9UUW2BGjrM2s0PzCOIWs='}
C:\Users\Beeri\Google Drive\Finance\BPicks\Stock Info\daily data copy - Copy\A.json

也许我没有理解解压的概念 但我想让JSON看起来像以前一样 JSON本身看起来是这样的：

[
    {
        "date": "2020-05-18 16:00:00",
        "open": 83.79,
        "low": 83.67,
        "high": 83.79,
        "close": 83.67,
        "volume": 1855946
    },
    {
        "date": "2020-05-18 15:59:00",
        "open": 83.815,
        "low": 83.77,
        "high": 83.83,
        "close": 83.79,
        "volume": 1822469
    },
    {
        "date": "2020-05-18 15:58:00",
        "open": 83.9,
        "low": 83.78,
        "high": 83.9,
        "close": 83.815,
        "volume": 1803855
    }
]

Answer 1

根据你的代码。

>>> compressed_json = data['base64(zip(o))']
>>> decompressed_json = zlib.decompress(b64decode(compressed))
>>> decompressed_json
b'"C:\\\\Users\\\\Beeri\\\\Google Drive\\\\Finance\\\\BPicks\\\\Stock Info\\\\daily data copy - Copy\\\\A.json"'
>>> json.loads(decompressed_json)
'C:\\Users\\Beeri\\Google Drive\\Finance\\BPicks\\Stock Info\\daily data copy - Copy\\A.json'

正如卡尔所提到的，你基本上是压缩了文件的路径，而不是实际的文件： 试试这个。

import zlib, json
from base64 import b64encode, b64decode

path = r"filename.json"

def compress_json(data):
    return {'base64(zip(o))': b64encode(zlib.compress(json.dumps(data).encode('utf-8'))).decode()}

def decompress_json(data):
    compressed_json =  data['base64(zip(o))']
    return json.loads(zlib.decompress(b64decode(compressed_json)))

with open(path, "r") as f:
    data = f.read()
    compressed_json = compress_json(data)
    print(compressed_json)
    """
    {'base64(zip(o))': 'eJxTio7JUwCCaggFAjFKKYklqTFKVkCWkYGRga6Bqa6hhYKhmZW
    BARDFKOkgq80vSM0DqbUw1jO3RJHJyS+HSpiZo0hkZKZnYNeSnJNfnIpdU1l+TmkuWM7QwtT
    U0sQMIlmrQ7T7Ta1MLfG638LQFIcHzHF6wMIYpwfQ/IbsASMjEzNLcjxggdcDuMLf3AKX83EH
    P3pgIDvfwBgYBVDnx+TFKgEASGiHCQ=='}
    """
    decompressed_json = decompress_json(compressed_json)
    print(decompressed_json)
    """
[
    {
        "date": "2020-05-18 16:00:00",
        "open": 83.79,
        "low": 83.67,
        "high": 83.79,
        "close": 83.67,
        "volume": 1855946
    },
    {
        "date": "2020-05-18 15:59:00",
        "open": 83.815,
        "low": 83.77,
        "high": 83.83,
        "close": 83.79,
        "volume": 1822469
    },
    {
        "date": "2020-05-18 15:58:00",
        "open": 83.9,
        "low": 83.78,
        "high": 83.9,
        "close": 83.815,
        "volume": 1803855
    }
]
"""