ValueError：预期的对象或值

Question

我正在尝试将示例 json 文件导入 pandas 数据框

我已经试过ValueError: Expected object or value when reading json as pandas dataframe

错误：

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-8-bd3924a4e6a1> in <module>()
      1 # working with json
      2 import pandas as pd
----> 3 df = pd.read_json("/content/drive/MyDrive/Datasets/sample3.json", lines=True)
      4 df.head()

6 frames
/usr/local/lib/python3.7/dist-packages/pandas/io/json/_json.py in _parse_no_numpy(self)
   1117         if orient == "columns":
   1118             self.obj = DataFrame(
-> 1119                 loads(json, precise_float=self.precise_float), dtype=None
   1120             )
   1121         elif orient == "split":

ValueError: Expected object or value

1 尝试：

# working with json
import pandas as pd
df = pd.read_json("/content/drive/MyDrive/Datasets/sample3.json") 
#df = pd.read_json("/content/drive/MyDrive/Datasets/sample3.json", lines=True)  #also tried 
#df = pd.read_json("/content/drive/MyDrive/Datasets/sample3.json", lines=True, orient='records') # also tried 
#df = pd.read_json("/content/drive/MyDrive/Datasets/sample3.json", orient=str) # also tried 
df.head()

Json 文件：

[
    {
        color: "red",
        value: "#f00"
    },
    {
        color: "green",
        value: "#0f0"
    },
    {
        color: "blue",
        value: "#00f"
    },
    {
        color: "cyan",
        value: "#0ff"
    },
    {
        color: "magenta",
        value: "#f0f"
    },
    {
        color: "yellow",
        value: "#ff0"
    },
    {
        color: "black",
        value: "#000"
    }
]

Answer 1

那不是有效的 JSON。

JSON 的对象键必须用双引号括起来，如下所示：

{
    "color": "red",
    "value": "#f00"
}

Answer 2

这实际上只是一个 JSON 问题。如果我在我的 IDE 中创建您的 JSON 文件，我会立即收到格式错误，因为该文件未正确编码。它说：

property keys must be doublequoted

如果我进行替换

[
    {
        "color": "red",
        "value": "#f00"
    },
    {
        "color": "green",
        "value": "#0f0"
    }
]

我现在可以使用

df = pd.read_json("file.json") 
print(df)

得到

   color value
0    red  #f00
1  green  #0f0