捕获xmltodict中的ExpatError

Question

我正在使用 xmltodict 来解析 XML 文件。

如果我们解析一个无效的 XML 文件，它会抛出一个 ExpatError 错误。

我该如何捕捉这个错误呢？这是我在 ipython 界面上尝试的代码：

>>> import xmltodict
>>> xml_data = """<?xml version="1.0" encoding="UTF-8" ?>
...     <Website>"""

>>> xml_dict = xmltodict.parse(xml_data)
ExpatError: no element found

>>> try:                      
...     xml_dict = xmltodict.parse(xml_data)
... except ExpatError:
...     print "that's right"
NameError: name 'ExpatError' is not defined

>>> try:                      
...     xml_dict = xmltodict.parse(xml_data)
... except xmltodict.ExpatError:
...     print "that's right"
AttributeError: 'module' object has no attribute 'ExpatError'

Answer 1

找到了，xmltodict模块本身就包含了这个功能，所以不需要单独从xml模块导入它。

>>> try:                                             
...     xml_dict = xmltodict.parse(xml_data)
... except xmltodict.expat.ExpatError:
...     print "that's right"
... 
that's right

Answer 2

你需要从 xml.parsers.expat 导入 ExpatError。

from xml.parsers.expat import ExpatError