cryptographyのインストール時のエラー（python)

Question

###やりたいこと
pythonでssh接続をしたく、paramikoを利用したいのですが、import時にエラーが発生してしまいます。
このエラーをなくしたいです。

Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/python/lib/python3.4/site-packages/paramiko/__init__.py", line 30, in <module>
    from paramiko.transport import SecurityOptions, Transport
  File "/usr/local/python/lib/python3.4/site-packages/paramiko/transport.py", line 32, in <module>
    from cryptography.hazmat.backends import default_backend
ImportError: No module named 'cryptography'

###エラー内容
cryptographyをインストールすればよいのかと思い、

pip install cryptography

```を実行すると以下のエラーが発生し、インストールできません。



```ここに言語を入力
Downloading/unpacking cryptography
  Downloading cryptography-1.4.tar.gz (399kB): 399kB downloaded
  Running setup.py (path:/tmp/pip_build_root/cryptography/setup.py) egg_info for package cryptography
    
    no previously-included directories found matching 'docs/_build'
    warning: no previously-included files matching '*' found under directory 'vectors'
Downloading/unpacking idna>=2.0 (from cryptography)
  Downloading idna-2.1-py2.py3-none-any.whl (54kB): 54kB downloaded
Requirement already satisfied (use --upgrade to upgrade): pyasn1>=0.1.8 in /usr/local/python/lib/python3.4/site-packages (from cryptography)
Downloading/unpacking six>=1.4.1 (from cryptography)
  Downloading six-1.10.0-py2.py3-none-any.whl
Requirement already satisfied (use --upgrade to upgrade): setuptools>=11.3 in /usr/local/python/lib/python3.4/site-packages (from cryptography)
Downloading/unpacking cffi>=1.4.1 (from cryptography)
  Downloading cffi-1.7.0.tar.gz (400kB): 400kB downloaded
  Running setup.py (path:/tmp/pip_build_root/cffi/setup.py) egg_info for package cffi

～長くて投稿できないので中略します～

  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 246, in run_setup
    DirectorySandbox(setup_dir).run(runner)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 276, in run
    return func()
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 245, in runner
    _execfile(setup_script, ns)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 47, in _execfile
    exec(code, globals, locals)
  File "/tmp/easy_install-m3_qrp91/cffi-1.7.0/setup.py", line 192, in <module>
    return True
  File "/usr/local/python/lib/python3.4/distutils/core.py", line 163, in setup
    raise SystemExit("error: " + str(msg))
SystemExit: error: command 'gcc' failed with exit status 1

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/command/easy_install.py", line 1100, in run_setup
    run_setup(setup_script, args)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 249, in run_setup
    raise
  File "/usr/local/python/lib/python3.4/contextlib.py", line 77, in __exit__
    self.gen.throw(type, value, traceback)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 197, in setup_context
    yield
  File "/usr/local/python/lib/python3.4/contextlib.py", line 77, in __exit__
    self.gen.throw(type, value, traceback)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 168, in save_modules
    saved_exc.resume()
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 143, in resume
    six.reraise(type, exc, self._tb)
  File "/usr/local/python/lib/python3.4/site-packages/pkg_resources/_vendor/six.py", line 685, in reraise
    raise value.with_traceback(tb)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 156, in save_modules
    yield saved
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 197, in setup_context
    yield
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 246, in run_setup
    DirectorySandbox(setup_dir).run(runner)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 276, in run
    return func()
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 245, in runner
    _execfile(setup_script, ns)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/sandbox.py", line 47, in _execfile
    exec(code, globals, locals)
  File "/tmp/easy_install-m3_qrp91/cffi-1.7.0/setup.py", line 192, in <module>
    return True
  File "/usr/local/python/lib/python3.4/distutils/core.py", line 163, in setup
    raise SystemExit("error: " + str(msg))
SystemExit: error: command 'gcc' failed with exit status 1

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/tmp/pip_build_root/cryptography/setup.py", line 333, in <module>
    **keywords_with_side_effects(sys.argv)
  File "/usr/local/python/lib/python3.4/distutils/core.py", line 108, in setup
    _setup_distribution = dist = klass(attrs)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/dist.py", line 279, in __init__
    self.fetch_build_eggs(attrs['setup_requires'])
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/dist.py", line 323, in fetch_build_eggs
    replace_conflicting=True,
  File "/usr/local/python/lib/python3.4/site-packages/pkg_resources/__init__.py", line 826, in resolve
    dist = best[req.key] = env.best_match(req, ws, installer)
  File "/usr/local/python/lib/python3.4/site-packages/pkg_resources/__init__.py", line 1092, in best_match
    return self.obtain(req, installer)
  File "/usr/local/python/lib/python3.4/site-packages/pkg_resources/__init__.py", line 1104, in obtain
    return installer(requirement)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/dist.py", line 390, in fetch_build_egg
    return cmd.easy_install(req)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/command/easy_install.py", line 664, in easy_install
    return self.install_item(spec, dist.location, tmpdir, deps)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/command/easy_install.py", line 694, in install_item
    dists = self.install_eggs(spec, download, tmpdir)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/command/easy_install.py", line 875, in install_eggs
    return self.build_and_install(setup_script, setup_base)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/command/easy_install.py", line 1114, in build_and_install
    self.run_setup(setup_script, setup_base, args)
  File "/usr/local/python/lib/python3.4/site-packages/setuptools/command/easy_install.py", line 1102, in run_setup
    raise DistutilsError("Setup script exited with %s" % (v.args[0],))
distutils.errors.DistutilsError: Setup script exited with error: command 'gcc' failed with exit status 1
Cleaning up...
Command /usr/local/bin/python -c "import setuptools, tokenize;__file__='/tmp/pip_build_root/cryptography/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('\r\n', '\n'), __file__, 'exec'))" install --record /tmp/pip-dogbba2h-record/install-record.txt --single-version-externally-managed --compile failed with error code 1 in /tmp/pip_build_root/cryptography
Storing debug log for failure in /root/.pip/pip.log

###試したこと

エラーが多くて何が問題かが分からないので、
"--compile failed with error code 1"の辺りに着目してweb検索して調べました。

https://teratail.com/questions/4839 を参考にして、
yum install gcc gcc-c++ kernel-devel
yum install python-devel
yum install libxslt-devel
をインストールしていますが、上記のエラーの状態です。

###補足情報
OS:CentOS
python3.4.1

Answer 1

pipでのインストールは、モジュールによってはこのようにビルドでハマってしまいますので、
Anacondaを導入された方が良いかも知れません。
cryptographyはAnacondaに入っています。

paramikoは入っていないので、それは改めて別途インストールしてください。

詳しくは、下記の質問を参考にしてください。

Python 3.x - virtualenvにモジュールがインストールできません。(41398)｜teratail
https://teratail.com/questions/41398

Comments

[tug]

頂いたリンクをもとに、Anacondaのインストール＋paramikoのインストールで、
解決しました。ありがとうございます。
http://qiita.com/y__sama/items/5b62d31cb7e6ed50f02c