Question

我有给定的示例代码（包含xml变量），我想读取Xml的一些属性，然后更新它们。更新后，我想使用requests.post发布它们。我得到的错误是＆＃34;没有很好的形成＆＃34;令牌，我无法解析xml。请说明代码中的错误。

# -*- coding: utf-8 -*-
from xml.etree import ElementTree as etree
dataxml = """<APIDataMessage MessageID="747950743" SensorID=extref MessageDate=messagedate State="16" SignalStrength=random.randint(40,70) Voltage="2.83" Battery=random.randint(80,90) Data=random.randint(27,40) DisplayData="67.1° F" PlotValue="67.1" MetNotificationRequirements="False" GatewayID="106558" DataValues="19.5" DataTypes="TemperatureData" PlotValues="67.1" PlotLabels="Fahrenheit" />"""
parser = etree.XMLParser(encoding="utf-8")
root = etree.fromstring(dataxml, parser=parser)
root.set('SignalStrength',100)
print etree.tostring(root)

Answer 1

根据我的需要在代码中做：

必须在""中提供XML属性值，例如<test id="12">。这是输入SensorID=extref MessageDate=messagedate
首先评估随机值，然后将值添加到字符串以创建完整标记。
需要set方法中的字符串，即root.set('SignalStrength','100')

<强>演示：

dataxml = """<APIDataMessage MessageID="747950743" SensorID="extref"\
 MessageDate="messagedate" State="16" SignalStrength="%s" \
Voltage="2.83" Battery="%s" Data="%s" DisplayData="67.1° F" PlotValue="67.1" \
MetNotificationRequirements="False" GatewayID="106558" DataValues="19.5" \
DataTypes="TemperatureData" PlotValues="67.1" PlotLabels="Fahrenheit" />"""\
%(random.randint(40,70), random.randint(80,90), random.randint(27,40))


from xml.etree import ElementTree as etree
parser = etree.XMLParser(encoding="utf-8")
root = etree.fromstring(dataxml, parser=parser)
root.set('SignalStrength',"100")
print etree.tostring(root)

Python：xml.etree.ElementTree.ParseError：格式不正确（无效令牌）

1 个答案: