キャッシュからのピップインストールがネットワークがないときに失敗することがある

Question

pythonパッケージをオフラインでインストールしたいと考えています。そうするために、私はピップインストールで - cache-dirを一度オンラインで収集し、次回はオフラインで同じ方法でピップが常にキャッシュを読み込むことを期待します。

初めて：オンライン（空のキャッシュ、空のvirtualenvの）：

~/tmp/venv$ LANG=C pip install --cache-dir /tmp/pipcache matplotlib 
Collecting matplotlib 
    Downloading matplotlib-2.0.2-cp27-cp27mu-manylinux1_x86_64.whl (14.5MB) 
    100% |################################| 14.5MB 99kB/s 
Collecting numpy>=1.7.1 (from matplotlib) 
    Downloading numpy-1.13.0-cp27-cp27mu-manylinux1_x86_64.whl (16.6MB) 
    100% |################################| 16.6MB 86kB/s 
Collecting cycler>=0.10 (from matplotlib) 
    Downloading cycler-0.10.0-py2.py3-none-any.whl 
Collecting python-dateutil (from matplotlib) 
    Downloading python_dateutil-2.6.0-py2.py3-none-any.whl (194kB) 
    100% |################################| 194kB 5.8MB/s 
Collecting functools32 (from matplotlib) 
    Downloading functools32-3.2.3-2.zip 
Collecting six>=1.10 (from matplotlib) 
    Downloading six-1.10.0-py2.py3-none-any.whl 
Collecting pytz (from matplotlib) 
    Downloading pytz-2017.2-py2.py3-none-any.whl (484kB) 
    100% |################################| 491kB 3.1MB/s 
Collecting pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=1.5.6 (from matplotlib) 
    Downloading pyparsing-2.2.0-py2.py3-none-any.whl (56kB) 
    100% |################################| 61kB 8.8MB/s 
Collecting subprocess32 (from matplotlib) 
    Downloading subprocess32-3.2.7.tar.gz (54kB) 
    100% |################################| 61kB 8.4MB/s 
Building wheels for collected packages: functools32, subprocess32 
    Running setup.py bdist_wheel for functools32 ... done 
    Stored in directory: /tmp/pipcache/wheels/3c/d0/09/cd78d0ff4d6cfecfbd730782a7815a4571cd2cd4d2ed6e69d9 
    Running setup.py bdist_wheel for subprocess32 ... done 
    Stored in directory: /tmp/pipcache/wheels/7d/4c/a4/ce9ceb463dae01f4b95e670abd9afc8d65a45f38012f8030cc 
Successfully built functools32 subprocess32 
Installing collected packages: numpy, six, cycler, python-dateutil, functools32, pytz, pyparsing, subprocess32, matplotlib 
Successfully installed cycler-0.10.0 functools32-3.2.3.post2 matplotlib-2.0.2 numpy-1.13.0 pyparsing-2.2.0 python-dateutil-2.6.0 pytz-2017.2 six-1.10.0 subprocess32-3.2.7 

セカンド時間：オフライン（キャッシュを再利用し、空のvirtualenvのを再作成）、すべてがOKです：

~/tmp/venv$ LANG=C pip install --cache-dir /tmp/pipcache matplotlib 
Collecting matplotlib 
    Using cached matplotlib-2.0.2-cp27-cp27mu-manylinux1_x86_64.whl 
Collecting numpy>=1.7.1 (from matplotlib) 
    Using cached numpy-1.13.0-cp27-cp27mu-manylinux1_x86_64.whl 
Collecting cycler>=0.10 (from matplotlib) 
    Using cached cycler-0.10.0-py2.py3-none-any.whl 
Collecting python-dateutil (from matplotlib) 
    Using cached python_dateutil-2.6.0-py2.py3-none-any.whl 
Collecting functools32 (from matplotlib) 
Collecting six>=1.10 (from matplotlib) 
    Using cached six-1.10.0-py2.py3-none-any.whl 
Collecting pytz (from matplotlib) 
    Using cached pytz-2017.2-py2.py3-none-any.whl 
Collecting pyparsing!=2.0.4,!=2.1.2,!=2.1.6,>=1.5.6 (from matplotlib) 
    Using cached pyparsing-2.2.0-py2.py3-none-any.whl 
Collecting subprocess32 (from matplotlib) 
Installing collected packages: numpy, six, cycler, python-dateutil, functools32, pytz, pyparsing, subprocess32, matplotlib 
Successfully installed cycler-0.10.0 functools32-3.2.3.post2 matplotlib-2.0.2 numpy-1.13.0 pyparsing-2.2.0 python-dateutil-2.6.0 pytz-2017.2 six-1.10.0 subprocess32-3.2.7 

3回目：オフライン（キャッシュの再利用、空のvirtualenvの再作成）：いくつかのエラー：

~/tmp/venv$ LANG=C pip install --cache-dir /tmp/pipcache matplotlib 
Collecting matplotlib 
    Using cached matplotlib-2.0.2-cp27-cp27mu-manylinux1_x86_64.whl 
Collecting numpy>=1.7.1 (from matplotlib) 
    Using cached numpy-1.13.0-cp27-cp27mu-manylinux1_x86_64.whl 
Collecting cycler>=0.10 (from matplotlib) 
    Using cached cycler-0.10.0-py2.py3-none-any.whl 
Collecting python-dateutil (from matplotlib) 
    Using cached python_dateutil-2.6.0-py2.py3-none-any.whl 
Collecting functools32 (from matplotlib) 
Collecting six>=1.10 (from matplotlib) 
    Retrying (Retry(total=4, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f7abfbdbfd0>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',)': /simple/six/ 
    Retrying (Retry(total=3, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f7abfbdb490>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',)': /simple/six/ 
    Retrying (Retry(total=2, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f7abfbdbf50>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',)': /simple/six/ 
    Retrying (Retry(total=1, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f7ac1068ed0>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',)': /simple/six/ 
    Retrying (Retry(total=0, connect=None, read=None, redirect=None)) after connection broken by 'NewConnectionError('<pip._vendor.requests.packages.urllib3.connection.VerifiedHTTPSConnection object at 0x7f7ac1068910>: Failed to establish a new connection: [Errno -3] Temporary failure in name resolution',)': /simple/six/ 
    Could not find a version that satisfies the requirement six>=1.10 (from matplotlib) (from versions:) 
No matching distribution found for six>=1.10 (from matplotlib) 

ar eネットワークエラー：すべてのパッケージがキャッシュ内で利用可能であるため、その理由がわかりません。さらに、エラーはランダムです：6つまたはpytzパッケージをインストールするときに発生する可能性があります。場合によっては上記のことが起こることがありますが、エラーが発生しないことがあります。

これを修正して、オフラインインストールができますか？

注：ピップとsetuptoolsのは

Answer 1

はadding the --no-index parameter（そしておそらく--find-linksすぎ）を試してみてください彼らの最新バージョンです。

EDIT：pip downloadとpip install -fを使用して動作するようです：

$ docker run -it python:3.6 bash 

root@06dbe462c2c3:/# cd tmp 
root@06dbe462c2c3:/tmp# ls 
root@06dbe462c2c3:/tmp# mkdir cache 
root@06dbe462c2c3:/tmp# pip download -d cache matplotlib 
Successfully downloaded matplotlib pytz numpy six pyparsing cycler python-dateutil 
root@06dbe462c2c3:/tmp# pip install --no-index matplotlib 
No matching distribution found for matplotlib 
root@06dbe462c2c3:/tmp# pip install --no-index matplotlib -f cache/ 
Collecting matplotlib 
Collecting cycler>=0.10 (from matplotlib) 
Collecting pyparsing!=2.0.0,!=2.0.4,!=2.1.2,!=2.1.6,>=1.5.6 (from matplotlib) 
Collecting python-dateutil (from matplotlib) 
Collecting pytz (from matplotlib) 
Collecting numpy>=1.7.1 (from matplotlib) 
Collecting six>=1.10 (from matplotlib) 
Installing collected packages: six, cycler, pyparsing, python-dateutil, pytz, numpy, matplotlib 
Successfully installed cycler-0.10.0 matplotlib-2.0.2 numpy-1.13.0 pyparsing-2.2.0 python-dateutil-2.6.0 pytz-2017.2 six-1.10.0 
root@06dbe462c2c3:/tmp#