update python

data/2.python中阶/3.网络爬虫/4.lxml/get_html_text.md

@@ -85,7 +85,7 @@ def fetch_text(html):
 ```python
 def fetch_text(html):
     html = etree.HTML(html)
-    result = html.xpath("//text")
+    result = html.xpath(".//text")
     return result
 ```