What are the findall() and xpath() methods on Element(Tree)?
findall() is part of the original ElementTree API. It supports a simple subset of the XPath language, without predicates, conditions and other advanced features. It is very handy for finding specific tags in a tree. Another important difference is namespace handling, which uses the {namespace}tagname notation. This is not supported by XPath. The findall, find and findtext methods are compatible with other ElementTree implementations and allow writing portable code that runs on ElementTree, cElementTree and lxml.etree. xpath(), on the other hand, supports the complete power of the XPath language, including predicates, XPath functions and Python extension functions. The syntax is defined by the XPath specification. If you need the expressiveness and selectivity of XPath, the xpath() method, the XPath class and the XPathEvaluator are the best choice.
