ValueError: I/O operation on closed file error for dblp dataset

Question

我正在尝试将 dblp 数据集的 xml 文件解析为 csv 文件。现在我用 lxml 模块来做这件事，并测试不同的功能以查看它们 return。但是当我运行以下代码时：

with open('F:\21up\Data\dblp.xml', 'rb') as f:
    context = etree.iterparse(f, dtd_validation=True, events= ("start","end"))

context = iter(context)
event, root = next(context)
for event, ele in context:
    print event
    print ele

我得到了 ValueError：

    Traceback (most recent call last):
  File "F:up\Data\XML2CSV", line 35, in <module>
    iterpar()
  File "F:up\Data\XML2CSV", line 28, in iterpar
    event, root = next(context)
  File "iterparse.pxi", line 208, in lxml.etree.iterparse.__next__ (src\lxml\lxml.etree.c:131498)
ValueError: I/O operation on closed file

我不知道这是怎么发生的。我用谷歌搜索了它，但还没有找到合适的解释。谁能告诉我如何解决？非常感谢。

Answer 1

我认为你的问题是你在 with 语句之外处理了上下文，这意味着你的文件到那时已经关闭了。

ValueError: I/O operation on closed file error for dblp dataset

ValueError: I/O operation on closed file error for dblp dataset

python

xml

lxml

python-2.7