尝试使用pip安装elementtree包.收到以下错误：
(taximachine_env)vagrant@dev-gm:/opt/taxi/taxiconsole$pip install elementtree -vvv
Collecting elementtree
Getting page https://pypi.python.org/simple/elementtree/
1 location(s) to search for versions of elementtree:
* https://pypi.python.org/simple/elementtree/
Getting page https://pypi.python.org/simple/elementtree/
Analyzing links from page https://pypi.python.org/simple/elementtree/
Could not find a version that satisfies the requirement elementtree (from versions: )
Cleaning up...
No matching distribution found for elementtree
Exception information:
Traceback (most recent call last):
File "/opt/taxi/envs/taximachine_env/local/lib/python2.7/site-packages/pip/basecommand.py",line 211,in main
status = self.run(options,args)
File "/opt/taxi/envs/taximachine_env/local/lib/python2.7/site-packages/pip/commands/install.py",line 294,in run
requirement_set.prepare_files(finder)
File "/opt/taxi/envs/taximachine_env/local/lib/python2.7/site-packages/pip/req/req_set.py",line 334,in prepare_files
functools.partial(self._prepare_file,finder))
File "/opt/taxi/envs/taximachine_env/local/lib/python2.7/site-packages/pip/req/req_set.py",line 321,in _walk_req_to_install
more_reqs = handler(req_to_install)
File "/opt/taxi/envs/taximachine_env/local/lib/python2.7/site-packages/pip/req/req_set.py",line 461,in _prepare_file
req_to_install.populate_link(finder,self.upgrade)
File "/opt/taxi/envs/taximachine_env/local/lib/python2.7/site-packages/pip/req/req_install.py",line 250,in populate_link
self.link = finder.find_requirement(self,upgrade)
File "/opt/taxi/envs/taximachine_env/local/lib/python2.7/site-packages/pip/index.py",line 571,in find_requirement
'No matching distribution found for %s' % req
DistributionNotFound: No matching distribution found for elementtree
PyPI link返回以下响应：
<head>
<title>Links for elementtree</title>
<Meta name="api-version" value="2">
<style type="text/css"></style>
</head>
<body>
<h1>Links for elementtree</h1>
</body>
</html>
有没有其他方法来安装elementtree？
解决方法
它位于stdlib：
http://docs.python.org/2/library/xml.etree.elementtree.html中.无需使用pip进行安装.