我正在尝试将此文本值写入 XML 标记,如下所示
<Parameter name="name"><![CDATA[xyzvalue]]></Parameter>
每当我将此值设置为该标签的文本时。它像这样生成
<Parameter name="name"><![CDATA[xyzvalue]]></Parameter>
我需要尝试避免代码中出现转义字符
ET.SubElement(parameters, "Parameter", name="id").text = unescape("<![CDATA[xyzvalue]]>")
如何避免像这样写入 xml 文件?我需要避免在 XML 中转义字符。
这是我的完整代码:
map = ET.Element("Map")
parameters = ET.SubElement(map, "Parameters")
ET.SubElement(parameters, "Parameter", name="bounds").text = "-180,-85.05112877980659,180,85.05112877980659"
ET.SubElement(parameters, "Parameter", name="center").text = "0,0,2"
ET.SubElement(parameters, "Parameter", name="format").text = "png"
ET.SubElement(parameters, "Parameter", name="minzoom").text = "0"
ET.SubElement(parameters, "Parameter", name="maxzoom").text = "22"
ET.SubElement(parameters, "Parameter", name="scale").text = "1"
ET.SubElement(parameters, "Parameter", name="metatile").text = "2"
ET.SubElement(parameters, "Parameter", name="id").text = unescape("<![CDATA[xyzvalue]]>")
ET.SubElement(parameters, "Parameter", name="_updated").text = "1552288036000"
ET.SubElement(parameters, "Parameter", name="name").text = "<![CDATA[xyzvalue]]>"
ET.SubElement(parameters, "Parameter", name="tilejson").text = "<![CDATA[2.0.0]]>"
ET.SubElement(parameters, "Parameter", name="scheme").text = "<![CDATA[xyz]]>"
indent(map)
tree = ET.ElementTree(map)
tree.write("plotfinder_tiles.xml", xml_declaration=True, encoding='utf-8', method="xml")
<小时/>
这与 How to output CDATA using ElementTree 不同在某种程度上,我在元素创建时遇到了这个问题,在创建 xml 后不要美化/删除。
最佳答案
如果是我,我会使用 lxml's CDATA
class .
但是,如果您想坚持使用 ElementTree,您可以可能重新定义 ET._escape_cdata
并确保文本不以 <![CDATA[
开头并且不以 ]]>
结尾在逃跑之前。
示例...
Python 3.#
import xml.etree.ElementTree as ET
def escape_cdata(text):
# escape character data
try:
if not text.startswith("<![CDATA[") and not text.endswith("]]>"):
if "&" in text:
text = text.replace("&", "&")
if "<" in text:
text = text.replace("<", "<")
if ">" in text:
text = text.replace(">", ">")
return text
except (TypeError, AttributeError):
ET._raise_serialization_error(text)
ET._escape_cdata = escape_cdata
map_elem = ET.Element("Map")
parameters = ET.SubElement(map_elem, "Parameters")
ET.SubElement(parameters, "Parameter", name="bounds").text = "-180,-85.05112877980659,180,85.05112877980659"
ET.SubElement(parameters, "Parameter", name="center").text = "0,0,2"
ET.SubElement(parameters, "Parameter", name="format").text = "png"
ET.SubElement(parameters, "Parameter", name="minzoom").text = "0"
ET.SubElement(parameters, "Parameter", name="maxzoom").text = "22"
ET.SubElement(parameters, "Parameter", name="scale").text = "1"
ET.SubElement(parameters, "Parameter", name="metatile").text = "2"
ET.SubElement(parameters, "Parameter", name="id").text = "<![CDATA[xyzvalue]]>"
ET.SubElement(parameters, "Parameter", name="_updated").text = "1552288036000"
ET.SubElement(parameters, "Parameter", name="name").text = "<![CDATA[xyzvalue]]>"
ET.SubElement(parameters, "Parameter", name="tilejson").text = "<![CDATA[2.0.0]]>"
ET.SubElement(parameters, "Parameter", name="scheme").text = "<![CDATA[xyz]]>"
tree = ET.ElementTree(map_elem)
tree.write("test.xml", xml_declaration=True, encoding='utf-8', method="xml")
XML 输出(test.xml;打印精美以提高可读性)
<Map>
<Parameters>
<Parameter name="bounds">-180,-85.05112877980659,180,85.05112877980659</Parameter>
<Parameter name="center">0,0,2</Parameter>
<Parameter name="format">png</Parameter>
<Parameter name="minzoom">0</Parameter>
<Parameter name="maxzoom">22</Parameter>
<Parameter name="scale">1</Parameter>
<Parameter name="metatile">2</Parameter>
<Parameter name="id"><![CDATA[xyzvalue]]></Parameter>
<Parameter name="_updated">1552288036000</Parameter>
<Parameter name="name"><![CDATA[xyzvalue]]></Parameter>
<Parameter name="tilejson"><![CDATA[2.0.0]]></Parameter>
<Parameter name="scheme"><![CDATA[xyz]]></Parameter>
</Parameters>
</Map>
更新:Python 2.7 的函数
def escape_cdata(text, encoding):
# escape character data
try:
if not text.startswith("<![CDATA[") and not text.endswith("]]>"):
if "&" in text:
text = text.replace("&", "&")
if "<" in text:
text = text.replace("<", "<")
if ">" in text:
text = text.replace(">", ">")
return text.encode(encoding, "xmlcharrefreplace")
except (TypeError, AttributeError):
ET._raise_serialization_error(text)
关于python - 避免在 python 中将 < 字符写入 XML,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/55141512/