带有xmltodict unparse()函数的ValueError -Python3

Question

我在使用xmltodict将json转换为xml时遇到了困难。但是，当我试图转换多个对象时，它会返回一个ValueError "ValueError：“。

以下是我的JSON数据：

到目前为止，我的脚本如下：

import json
import xmltodict

    y = """{{  "markers":[  {  "point":"new GLatLng(40.266044,-74.718479)","awayTeam":"LUGip","markerImage":"images/red.png","fixture":"Wednesday 7pm","information":"Linux users group meets second Wednesday of each month.","previousScore":"","capacity":"","homeTeam":"Lawrence Library"},{  "point":"new GLatLng(40.211600,-74.695702)","awayTeam":"LUGip HW SIG","tv":"","markerImage":"images/white.png","fixture":"Tuesday 7pm","information":"Linux users can meet the first Tuesday of the month to work out harward and configuration issues.","capacity":"","homeTeam":"Hamilton Library"},{  "point":"new GLatLng(40.294535,-74.682012)","awayTeam":"After LUPip Mtg Spot","tv":"","markerImage":"images/newcastle.png","fixture":"Wednesday whenever","information":"Some of us go there after the main LUGip meeting, drink brews, and talk.","capacity":"2 to 4 pints","homeTeam":"Applebees"}]}"""

y2 = json.loads(y)
print(xmltodict.unparse(y2, pretty = True))

结果：

Traceback (most recent call last):

  File "<ipython-input-89-8838ce8b0d7f>", line 1, in <module>
    print(xmltodict.unparse(y2,pretty=True))

  File "/Users/luzazul/anaconda/lib/python3.4/site-packages/xmltodict.py", line 323, in unparse
    raise ValueError('Document must have exactly one root.')

ValueError: Document must have exactly one root.

任何帮助都将不胜感激，谢谢！

Answer 1

假设您已经清理了输入以使其有效(请参阅对问题的评论)。

看起来，xmltodict试图为列表中的每个项创建一个markers元素，而且由于markers位于顶层，所以您试图创建多个根。

为此，我将在数据周围添加一个顶级元素，如下所示：

y2 = {'root':y2}

Answer 2

您可以使用xmljson库来使用不同的XML约定进行转换。它通过返回元素数组来支持多个根。

例如：

>>> import xmljson
>>> xmljson.badgerfish.etree({'x': 1, 'y': 2})
[<Element y at 0x3114a08>, <Element x at 0x3114a48>]

--返回x和y元素。