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choallin
Asked: 2012-02-16 11:18:41 +0800 CST

How do I install packages with pip when there are multiple Python versions?

  • 772

I have different versions of python installed, python 2.7 being the default and 3.2 the second. Now I want to install pyramid to the 3.2 installation. How can I do this? Just using pip to install pyramid does not work, so how can I change the version it is downloading to?

python pip

5 Answers

  1. Best Answer

    You have two options, but either way, you need to get easy_install-3.2. Since it doesn't seem to be packaged, you have to install it yourself. Fortunately that's easy. And you should also get python3-pkg-resources, which is packaged:

    sudo apt-get install python3-pkg-resources
wget http://python-distribute.org/distribute_setup.py
sudo python3 distribute_setup.py

    Now you can just use easy_install-3.2 to install Pyramid, or go ahead and install pip in Python3.

    OPTION 1:

    sudo easy_install-3.2 pyramid

    OPTION 2:

    sudo easy_install-3.2 pip
sudo pip-3.2 install pyramid
    • 10

  2. Alternatively, if you want to install specific version of the package with the specific version of python, this is the way

     sudo python2.7 -m pip install pyudev=0.16

    If the "=" doesnt work, use "=="

     sudo python2.7 -m pip install pyudev=0.16

    Ouput: Invalid requirement: 'pyudev=0.16' = is not a valid operator. Did you mean == ?

     sudo python2.7 -m pip install pyudev==0.16

    works fine

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  3. Each python binary should have its own pip executable.

    You get one automatically if you use virtualenv. Then you could just run pip install pyramid in an activated virtualenv e.g.:

    $ vex venv pip install pyramid

    If you want to use pip to install for a system python3 then you could install pip for it:

    $ sudo apt-get install python3-pip

    It installs pip3 program. Then:

    $ pip3 install --user pyramid

    installs pyramid in ~/.local directory tree.

    If you need to test a Python package on several python versions; you could use tox.

    • 2

  4. In the case where you have installed a separate user-only version of Python by downloading and extracting the tar.gz from the Python.org Downloads page and done a:-

    tar -xzf Python-x.x.x.tar.gz
cd Python-x.x.x/
./configure
make

    You can use get-pip to install and run pip for this Python install only.

    Download it with curl as per the git-pip instructions. Then, within your Python-x.x.x/ directory, run:

    ./python -m get-pip.py --user
./python -m pip install pyramid --user
    • 1

  5. You can add this to your .bashrc file:

    pip3.8() {
  python3.8 -m pip "$@"
}

    After creating a new terminal session simply install packages with:

    pip3.8 instal xyz
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