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在我执行 `pip install flask-bootstrap` 出现了一个这样的错误
-- error: Error -5 while decompressing data: incomplete or truncated stream
安装/卸载其他包是正常的。唯独管理flask-bootstrap 出现了这样的错误。
版本信息：
#pip --version
pip 7.1.2 from /usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg (python 2.7)
#python --version
Python 2.7.3
完整的报错信息是：
^_^[15:36:31][root@master01 ~]#pip install flask-bootstrap
Collecting flask-bootstrap
Exception:
Traceback (most recent call last):
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/basecommand.py", line 211, in main
status = self.run(options, args)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/commands/install.py", line 294, in run
requirement_set.prepare_files(finder)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/req/req_set.py", line 334, in prepare_files
functools.partial(self._prepare_file, finder))
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/req/req_set.py", line 321, in _walk_req_to_install
more_reqs = handler(req_to_install)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/req/req_set.py", line 461, in _prepare_file
req_to_install.populate_link(finder, self.upgrade)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/req/req_install.py", line 250, in populate_link
self.link = finder.find_requirement(self, upgrade)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/index.py", line 486, in find_requirement
all_versions = self._find_all_versions(req.name)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/index.py", line 404, in _find_all_versions
index_locations = self._get_index_urls_locations(project_name)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/index.py", line 378, in _get_index_urls_locations
page = self._get_page(main_index_url)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/index.py", line 818, in _get_page
return HTMLPage.get_page(link, session=self.session)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/index.py", line 928, in get_page
"Cache-Control": "max-age=600",
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/requests/sessions.py", line 477, in get
return self.request('GET', url, **kwargs)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/download.py", line 373, in request
return super(PipSession, self).request(method, url, *args, **kwargs)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/requests/sessions.py", line 465, in request
resp = self.send(prep, **send_kwargs)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/requests/sessions.py", line 573, in send
r = adapter.send(request, **kwargs)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/cachecontrol/adapter.py", line 36, in send
cached_response = self.controller.cached_request(request)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/cachecontrol/controller.py", line 102, in cached_request
resp = self.serializer.loads(request, self.cache.get(cache_url))
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/cachecontrol/serialize.py", line 108, in loads
return getattr(self, "_loads_v{0}".format(ver))(request, data)
File "/usr/local/lib/python2.7/site-packages/pip-7.1.2-py2.7.egg/pip/_vendor/cachecontrol/serialize.py", line 164, in _loads_v2
cached = json.loads(zlib.decompress(data).decode("utf8"))
error: Error -5 while decompressing data: incomplete or truncated stream
原来在PIP的本地缓存损坏了（在我这里的环境中，默认情况下在 ~/.cache/pip）。
我测试了一下，试图执行 `pip install --no-cache-dir flask-bootstrap`,它工作了。
为了确认这是高速缓存，我执行：
pip uninstall flask-bootstrap
rm -rf ~/.cache/pip/*`
pip install flask-bootstrap
或者 pip install --no-cache-dir install flask-bootstrap
这次它成功了，而它之前总是失败。
我不知道该这个问题是否跟缓存的问题有关。但我的猜测是，PIP被中断下载导致缓存数据被破坏。
