ピップインストール要求[セキュリティ] NameError：名前 'python_implementation'が定義されていません

Question

pip install requests[security]==2.10.0の実行中に問題が発生しています。

私はこれをvirtualenvのbento/debian-7.8のPython 2.7.3で実行しています。ここで

は誤りです：

Collecting cryptography>=1.9 (from pyOpenSSL>=0.13->requests[security]==2.10.0->-r requirements.txt (line 22)) 
Exception: 
Traceback (most recent call last): 
    File "/vagrant/Devel/chalktalk-legacy/chalktalk/env/local/lib/python2.7/site-packages/pip/basecommand.py", line 211, in main 
    status = self.run(options, args) 
    File "/vagrant/Devel/chalktalk-legacy/chalktalk/env/local/lib/python2.7/site-packages/pip/commands/install.py", line 305, in run 
    wb.build(autobuilding=True) 
    File "/vagrant/Devel/chalktalk-legacy/chalktalk/env/local/lib/python2.7/site-packages/pip/wheel.py", line 705, in build 
    self.requirement_set.prepare_files(self.finder) 
    File "/vagrant/Devel/chalktalk-legacy/chalktalk/env/local/lib/python2.7/site-packages/pip/req/req_set.py", line 334, in prepare_files 
    functools.partial(self._prepare_file, finder)) 
    File "/vagrant/Devel/chalktalk-legacy/chalktalk/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 "/vagrant/Devel/chalktalk-legacy/chalktalk/env/local/lib/python2.7/site-packages/pip/req/req_set.py", line 561, in _prepare_file 
    set(req_to_install.extras) - set(dist.extras) 
    File "/vagrant/Devel/chalktalk-legacy/chalktalk/env/local/lib/python2.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2774, in extras 
    return [dep for dep in self._dep_map if dep] 
    File "/vagrant/Devel/chalktalk-legacy/chalktalk/env/local/lib/python2.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2797, in _dep_map 
    self.__dep_map = self._compute_dependencies() 
    File "/vagrant/Devel/chalktalk-legacy/chalktalk/env/local/lib/python2.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2830, in _compute_dependencies 
    common = frozenset(reqs_for_extra(None)) 
    File "/vagrant/Devel/chalktalk-legacy/chalktalk/env/local/lib/python2.7/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2827, in reqs_for_extra 
    if req.marker_fn(override={'extra':extra}): 
    File "/vagrant/Devel/chalktalk-legacy/chalktalk/env/local/lib/python2.7/site-packages/pip/_vendor/_markerlib/markers.py", line 113, in marker_fn 
    return eval(compiled_marker, environment) 
    File "<environment marker>", line 1, in <module> 
NameError: name 'python_implementation' is not defined 

Answer 1

問題が最も可能性の高いあなたのvirtualenvの内部時代遅れピップバージョンによって引き起こされます。以下のコマンドでそれをアップグレードしてみてください：

pip install --upgrade pip