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python - 无法加载 json 文件，大量对象，以在 python 中创建数据框

问题描述

我正在尝试加载一个数组中包含大约 2k 个对象的 json 文件：

[
  {
    "id": 5375,
    "name": "cepharanthine",
    "mrdef": "The mechanism of action of cepharanthine is multifactorial. The drug exerts membrane effects (modulation of efflux pumps, membrane rigidification) as well as different intracellular and nuclear effects. Cepharanthine interferes with several metabolic axes, primarily with the AMP-activated protein kinase (AMPK) and NFkappaB signaling pathways. In particular, the anti-inflammatory effects of cepharanthine rely on AMPK activation and NFkappaB inhibition.",
    "indications": [
      "Leukopenia",
      " Snake bite - wound",
      " Aptyalism",
      " Alopecia"
    ],
    "contraindication": [
      ""
    ]
  },
  {
    "id": 5301,
    "name": "baloxavir marboxil",
    "mrdef": "Baloxavir marboxil is a prodrug that is converted by hydrolysis to baloxavir, the active form that exerts anti-influenza virus activity. Baloxavir inhibits the endonuclease activity of the polymerase acidic (PA) protein, an influenza virus-specific enzyme in the viral RNA polymerase complex required for viral gene transcription, resulting in inhibition of influenza virus replication. The 50% inhibitory concentration (IC50) of baloxavir was 1.4 to 3.1 nM (n=4) for influenza A viruses and 4.5 to 8.9 nM (n=3) for influenza B viruses in a PA endonuclease assay. Viruses with reduced susceptibility to baloxavir have amino acid substitutions in the PA protein.",
    "indications": [
      "Influenza"
    ],
    "contraindication": [
      ""
    ]
  },
....

我正在尝试像这样加载文件：

import json

with open('filepath', 'r') as f:
    data = json.load(f)
    print(data)

但我得到的错误是：

JSONDecodeError                           Traceback (most recent call last)
<ipython-input-81-50fc0a9fd23c> in <module>
      1 with open('C:/Users/Mohammed Safee Uddin/Documents/drugcentral_generics_data.json', 'r') as f:
----> 2     data = json.load(f)
      3     print(data)

~\anaconda3\lib\json\__init__.py in load(fp, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw)
    294         cls=cls, object_hook=object_hook,
    295         parse_float=parse_float, parse_int=parse_int,
--> 296         parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
    297 
    298 

~\anaconda3\lib\json\__init__.py in loads(s, encoding, cls, object_hook, parse_float, parse_int, parse_constant, object_pairs_hook, **kw)
    346             parse_int is None and parse_float is None and
    347             parse_constant is None and object_pairs_hook is None and not kw):
--> 348         return _default_decoder.decode(s)
    349     if cls is None:
    350         cls = JSONDecoder

~\anaconda3\lib\json\decoder.py in decode(self, s, _w)
    335 
    336         """
--> 337         obj, end = self.raw_decode(s, idx=_w(s, 0).end())
    338         end = _w(s, end).end()
    339         if end != len(s):

~\anaconda3\lib\json\decoder.py in raw_decode(self, s, idx)
    353             obj, end = self.scan_once(s, idx)
    354         except StopIteration as err:
--> 355             raise JSONDecodeError("Expecting value", s, err.value) from None
    356         return obj, end

JSONDecodeError: Expecting value: line 1 column 1 (char 0)

我也尝试将 json.load 更改为 json.loads(f.read()) 但没有任何效果，它会抛出相同的错误。我是编程本身的新手，非常感谢任何帮助。提前致谢。

标签： pythonjsonpython-3.xjupyter-notebook

解决方案

有 2 种（主要）方法可以加载 json 文件。使用“r”将文件作为文本阅读器打开。在这种情况下，您需要调用f.read()并转换使用json.loads()

with open('data.txt', 'r') as f:
    data = json.loads(f.read())
    print(data)

或者，您可以打开文件，而不使用阅读器模式'r'并调用json.load()

with open('data.txt') as json_file:
    data = json.load(json_file)
    print(data)

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