python - 带有 xmltodict unparse() 函数的 ValueError - Python 3

Question

我在使用 xmltodict 将 json 转换为 xml 时遇到问题。它适用于单个根和单个对象，但是当我尝试转换多个对象时，它返回 ValueError“ValueError:具有多个根的文档”。

这是我的 JSON 数据:

这是迄今为止我的脚本:

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.

任何帮助将不胜感激，谢谢!

Answer 1

假设您已清理输入以使其有效(请参阅问题评论)...

看起来 xmltodict 正在尝试为列表中的每个项目创建一个 markers 元素，并且由于 markers 位于顶层，因此您正在尝试创建多个根。

我会通过在数据周围添加一个顶级元素来实现这一点，如下所示:

y2 = {'root':y2}