lxml.etree._tagValidOrRaise() 提示 Invalid tag name 导致无法获取界面内容

版本信息

Name: uiautomator2 Version: 2.14.1

问题描述

d.xpath("//*[re:match(@text, '^.*')]").all()提取支付宝首页文本时, 出现异常报错

---------------------------------------------------------------------------
ValueError                                Traceback (most recent call last)
<ipython-input-18-bbe349559290> in <module>
----> 1 d.xpath("//*[re:match(@text, '^.*')]").all()

c:\users\w\anaconda3\lib\site-packages\uiautomator2\xpath.py in all(self, source)
    473 
    474         for node in root.xpath("//node"):
--> 475             node.tag = safe_xmlstr(node.attrib.pop("class", "")) or "node"
    476 
    477         match_sets = []

src/lxml/etree.pyx in lxml.etree._Element.tag.__set__()

src/lxml/apihelpers.pxi in lxml.etree._tagValidOrRaise()

ValueError: Invalid tag name '  '

通过d.dump_hierarchy()获取xml, 发现确实有个class为" "的node项

<node index="0" text="" resource-id="" class="  " package="com.eg.android.AlipayGphone" content-desc="财富生活" checkable="false" checked="false" clickable="false" enabled="true" focusable="true" focused="false" scrollable="false" long-clickable="false" password="false" selected="false" visible-to-user="true" bounds="[36,1556][1044,1676]">

用ATX WEditor找到对应项