Question

我从蔚蓝数据湖中下载了以下格式的文件：

{"PartitionKey":"2020-10-05","value":"Resolved"...}
{"PartitionKey":"2020-10-06","value":"Resolved"...}

我只想在python中读取和解析此内容。

def read_ods_file():

    file_path = 'temp.json'
    data = []
    with open(file_path) as f:
        for line in f:
            data.append(json.loads(line))

这给了我一个例外：

          data.append(json.loads(line))
        File "C:\python3.6\lib\json\__init__.py", line 354, in loads
          return _default_decoder.decode(s)
        File "C:\python3.6\lib\json\decoder.py", line 339, in decode
          obj, end = self.raw_decode(s, idx=_w(s, 0).end())
        File "C:\python3.6\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)

打印行会在开始时显示这些添加的字符。这些添加的字符是什么？

ï»¿{"PartitionKey":"2020-10-05","value":"Resolved"...}

{"PartitionKey":"2020-10-06","value":"Resolved"...}

Answer 1

Microsoft使用各种奇怪的字符。您可以尝试使用string.printable仅获得如下所示的普通ASCII字符：

How can I remove non-ASCII characters but leave periods and spaces using Python?

Answer 2

您设置的f变量

with open(file_path) as f:

是python文件对象（类型为_io.TextIOWrapper）。如果您想将每行作为json对象读取，则应尝试以下操作：

with open(file_path) as f:
    # read the file contents into a string
    # strip off trailing whitespace
    # split string into list of strings on \n character
    for line in f.read().strip().splitlines():
        data.append(json.loads(line))

解析从Azure数据湖下载的json文件

2 个答案: