打开文件时lxml中的神秘错误答案

【问题标题】：Cryptic error in lxml when opening file打开文件时lxml中的神秘错误
【发布时间】：2016-07-18 07:15:40
【问题描述】：

我的代码相当简单；

f = open(r"C:\filepath\file.xml")
xml = f.read()
tree = etree.parse(xml)

运行时，我得到堆栈跟踪

tree = etree.parse(xml)
  File "src/lxml/lxml.etree.pyx", line 3427, in lxml.etree.parse (src\lxml\lxml.etree.c:79801)
  File "src/lxml/parser.pxi", line 1782, in lxml.etree._parseDocument (src\lxml\lxml.etree.c:115995)
  File "src/lxml/parser.pxi", line 1808, in lxml.etree._parseDocumentFromURL (src\lxml\lxml.etree.c:116345)
  File "src/lxml/parser.pxi", line 1712, in lxml.etree._parseDocFromFile (src\lxml\lxml.etree.c:115233)
  File "src/lxml/parser.pxi", line 1115, in lxml.etree._BaseParser._parseDocFromFile (src\lxml\lxml.etree.c:109930)
  File "src/lxml/parser.pxi", line 573, in lxml.etree._ParserContext._handleParseResultDoc (src\lxml\lxml.etree.c:103404)
  File "src/lxml/parser.pxi", line 683, in lxml.etree._handleParseResult (src\lxml\lxml.etree.c:105058)
  File "src/lxml/parser.pxi", line 611, in lxml.etree._raiseParseError (src\lxml\lxml.etree.c:103924)
IOError

这里发生了什么？

【问题讨论】：

标签： python python-2.7 debugging error-handling lxml

【解决方案1】：

parse() 接受 XML 文件的路径：

tree = etree.parse(r"C:\filepath\file.xml")

目前，您的代码将 XML 的实际内容传递给 parse()，这将触发 IOError。您可以改用 fromstring() 从包含实际 XML 数据的字符串创建 Element 对象。如果需要，您可以从之前创建的 Element 创建一个 ElementTree 对象：

f = open(r"C:\filepath\file.xml")
xml = f.read()
root = etree.fromstring(xml)
tree = etree.ElementTree(root)

【讨论】：