使用Python 3读取JSON文件 [英] Reading JSON file with Python 3

问题描述

我在Windows 10 x64上使用Python 3.5.2.我正在读取的JSON文件是此，它是一个包含2个元素的JSON数组更多数组.

I'm using Python 3.5.2 on Windows 10 x64. The JSON file I'm reading is this which is a JSON array containing 2 more arrays.

我正在尝试使用json模块解析此JSON文件.如 docs 所述，JSON文件必须为符合RFC 7159.我检查了文件这里，它告诉我RFC 7159格式完全可以，但是当尝试使用以下简单的python代码读取它时:

I'm trying to parse this JSON file using the json module. As described in the docs the JSON file must be compliant to RFC 7159. I checked my file here and it tells me it's perfectly fine with the RFC 7159 format, but when trying to read it using this simple python code:

with open(absolute_json_file_path, encoding='utf-8-sig') as json_file:
    text = json_file.read()
    json_data = json.load(json_file)
    print(json_data)

我遇到此异常:

Traceback (most recent call last):
  File "C:\Program Files (x86)\JetBrains\PyCharm 4.0.5\helpers\pydev\pydevd.py", line 2217, in <module>
    globals = debugger.run(setup['file'], None, None)
  File "C:\Program Files (x86)\JetBrains\PyCharm 4.0.5\helpers\pydev\pydevd.py", line 1643, in run
    pydev_imports.execfile(file, globals, locals)  # execute the script
  File "C:\Program Files (x86)\JetBrains\PyCharm 4.0.5\helpers\pydev\_pydev_imps\_pydev_execfile.py", line 18, in execfile
    exec(compile(contents+"\n", file, 'exec'), glob, loc) 
  File "C:/Users/Andres Torti/Git-Repos/MCF/Sur3D.App/shapes-json-checker.py", line 14, in <module>
    json_data = json.load(json_file)
  File "C:\Users\Andres Torti\AppData\Local\Programs\Python\Python35-32\lib\json\__init__.py", line 268, in load
    parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
  File "C:\Users\Andres Torti\AppData\Local\Programs\Python\Python35-32\lib\json\__init__.py", line 319, in loads
    return _default_decoder.decode(s)
  File "C:\Users\Andres Torti\AppData\Local\Programs\Python\Python35-32\lib\json\decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "C:\Users\Andres Torti\AppData\Local\Programs\Python\Python35-32\lib\json\decoder.py", line 357, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

我可以用JavaScript很好地读取此确切文件，但无法让Python对其进行解析.我的文件有问题吗?还是Python解析器有问题?

I can read this exact file perfectly fine on Javascript but I can't get Python to parse it. Is there anything wrong with my file or is any problem with the Python parser?

推荐答案

基于对文档再次出现，您似乎需要将第三行更改为

Based on reading over the documentation again, it appears you need to either change the third line to

json_data = json.loads(text)

或删除行

text = json_file.read()

，因为read()导致文件的索引到达文件的末尾. (我想，也可以重置文件的索引.)

since read() causes the file's index to reach the end of the file. (I suppose, alternatively, you can reset the index of the file).

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