Eu tenho pip 8.1.1 tentando atualizar com pip install --upgrade pip . O comando não falha, mas também não faz nada. A saída é
Collecting pip
Downloading pip-9.0.1-py2.py3-none-any.whl (1.3MB)
100% |████████████████████████████████| 1.3MB 615kB/s
Installing collected packages: pip
Found existing installation: pip 8.1.1
Not uninstalling pip at /usr/lib/python2.7/dist-packages, outside environment /usr
Successfully installed pip-8.1.1
You are using pip version 8.1.1, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Além disso, provavelmente relacionado, estou tentando instalar matplotlib com pip install matplotlib==2.0.0 e estou recebendo o seguinte resultado:
Collecting matplotlib==2.0.0
Downloading matplotlib-2.0.0-1-cp27-cp27mu-manylinux1_x86_64.whl (14.6MB)
100% |████████████████████████████████| 14.6MB 94kB/s
Requirement already satisfied (use --upgrade to upgrade): numpy>=1.7.1 in /usr/lib/python2.7/dist-packages (from matplotlib==2.0.0)
Collecting cycler>=0.10 (from matplotlib==2.0.0)
Using cached cycler-0.10.0-py2.py3-none-any.whl
Requirement already satisfied (use --upgrade to upgrade): python-dateutil in /usr/lib/python2.7/dist-packages (from matplotlib==2.0.0)
Requirement already satisfied (use --upgrade to upgrade): functools32 in /usr/local/lib/python2.7/dist-packages (from matplotlib==2.0.0)
Requirement already satisfied (use --upgrade to upgrade): six>=1.10 in /usr/lib/python2.7/dist-packages (from matplotlib==2.0.0)
Requirement already satisfied (use --upgrade to upgrade): pytz in /usr/lib/python2.7/dist-packages (from matplotlib==2.0.0)
Requirement already satisfied (use --upgrade to upgrade): pyparsing!=2.0.0,!=2.0.4,!=2.1.2,!=2.1.6,>=1.5.6 in /usr/lib/python2.7/dist-packages (from matplotlib==2.0.0)
Requirement already satisfied (use --upgrade to upgrade): subprocess32 in /usr/local/lib/python2.7/dist-packages (from matplotlib==2.0.0)
Installing collected packages: cycler, matplotlib
Found existing installation: cycler 0.9.0
Not uninstalling cycler at /usr/lib/python2.7/dist-packages, outside environment /usr
Successfully installed cycler-0.9.0 matplotlib-2.0.0
You are using pip version 8.1.1, however version 9.0.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Mas quando não consigo importar matplotlib porque a versão cycler não está atualizada.
Então, acho que a chave é a mensagem Not uninstalling pip at /usr/lib/python2.7/dist-packages, outside environment /usr , mas não sei o que isso significa.
Eu não entendi muito bem o motivo, mas aparentemente isso vem do fato de que o pip foi instalado via apt e estou tentando atualizá-lo com o pip. Então a solução foi remover o pip via apt e instalá-lo com get-pip.py , que é independente de apt .
Agora, ambos os comandos funcionam bem.