Is there any way to make pip play well with multiple versions of Python? For example, I want to use pip to explicitly install things to either my site 2.5 installation or my site 2.6 installation.
For example, with easy_install, I use easy_install-2.{5,6}.
And, yes — I know about virtualenv, and no — it's not a solution to this particular problem.
The current recommendation is to use python -m pip, where python is the version of Python you would like to use. This is the recommendation because it works across all versions of Python, and in all forms of virtualenv. For example:
# The system default python:
$ python -m pip install fish
# A virtualenv's python:
$ .env/bin/python -m pip install fish
# A specific version of python:
$ python-3.6 -m pip install fish
Previous answer, left for posterity:
Since version 0.8, Pip supports pip-{version}. You can use it the same as easy_install-{version}:
$ pip-2.5 install myfoopackage
$ pip-2.6 install otherpackage
$ pip-2.7 install mybarpackage
EDIT: pip changed its schema to use pipVERSION instead of pip-VERSION in version 1.5. You should use the following if you have pip >= 1.5:
$ pip2.6 install otherpackage
$ pip2.7 install mybarpackage
Check https://github.com/pypa/pip/pull/1053 for more details
References:
pip and pip-2.7, and that's correct. I have pip installed in my system-wide Python 2.4, and created right now a fresh virtualenv with pip 1.2.1 and it works perfectly: I have a pip, pip-2.7 and pip-2.4. Take a look at my output: gist.github.com/3828343 –
Mendelsohn pip via pip/easy_install or get-pip.py or you don't have python2.7. if you have python2.7, try: pip install --upgrade pip and you should have pip and pip-2.7 –
Mendelsohn pip2.7 instead of pip-2.7 in CentOS –
Indianapolis pip gets picked based on the environment variable $PATH. If you want to change what is the "default" pip program, reorder the $PATH environment variable. Search for something like "path environment variable linux" for more details on $PATH. –
Mendelsohn pip doesn't make versioned scripts executables. So if I install the same package for two versions of python, they will overwrite each other's scripts. –
Sullen pip default to the latest version? –
Delindadelineate locale.Error: unsupported locale setting" using this method. Fixed it by using "export LC_ALL=C" before the "python -m pip install ..." command. –
Walther pip wasn't installed with python, then pythonx.y -m pip install fish will generate the error /usr/bin/pythonx.y: No module named pip. This can be resolved by installing pip, as per these instructions for Ubuntu. –
Dinkins On Windows, you can execute the pip module using a given Python version through the Python launcher, py.exe, if you chose to install it during Python 3 setup.
py -3 -m pip install packagename
py -2 -m pip install packagename
You can be even more specific and request an exact sub-version of Python:
py -3.6 -m pip install packagename
To get a list of all installed Python versions available through the launcher, run:
py --list
Alternatively, you can launch the desired Python executable directly:
C:/path/to/specific/python.exe -m pip install packagename
python2, python3, pip2 and pip3 on Windows? –
Dracaena /path/to/python2.{5,6} /path/to/pip install PackageName doesn't work?
For this to work on any python version that doesn't have pip already installed you need to download pip and do python*version* setup.py install. For example python3.3 setup.py install. This resolves the import error in the comments. (As suggested by @hbdgaf)
python2.7 -m pip install PackageName –
Decalescence I had python 2.6 installed by default (Amazon EC2 AMI), but needed python2.7 plus some external packages for my application. Assuming you already installed python2.7 alongside with default python (2.6 in my case). Here is how to install pip and packages for non-default python2.7
Install pip for your python version:
curl -O https://bootstrap.pypa.io/get-pip.py
python27 get-pip.py
Use specific pip version to install packages:
pip2.7 install mysql-connector-python --allow-external mysql-connector-python
python3 get-pip.py and later using pip command with pip34 install example –
Constellate Could not find a version that satisfies the requirement pip (from versions: ) No matching distribution found for pip when I tried python2.6 get-pip.py –
Lon python2.7 get-pip.py without sudo? –
Vine It worked for me in windows this way:
I changed the name of python files python.py and pythonw.exe to python3.py pythonw3.py
Then I just ran this command in the prompt:
python3 -m pip install package
Other answers show how to use pip with both 2.X and 3.X Python, but does not show how to handle the case of multiple Python distributions (eg. original Python and Anaconda Python).
I have a total of 3 Python versions: original Python 2.7 and Python 3.5 and Anaconda Python 3.5.
Here is how I install a package into:
Original Python 3.5:
/usr/bin/python3 -m pip install python-daemon
Original Python 2.7:
/usr/bin/python -m pip install python-daemon
Anaconda Python 3.5:
python3 -m pip install python-daemon
or
pip3 install python-daemon
Simpler, as Anaconda overrides original Python binaries in user environment.
Of course, installing in anaconda should be done with conda command, this is just an example.
Also, make sure that pip is installed for that specific python.You might need to manually install pip. This works in Ubuntu 16.04:
sudo apt-get install python-pip
or
sudo apt-get install python3-pip
From here: https://docs.python.org/3/installing/
Here is how to install packages for various versions that are installed at the same time linux, mac, posix:
python2 -m pip install SomePackage # default Python 2
python2.7 -m pip install SomePackage # specifically Python 2.7
python3 -m pip install SomePackage # default Python 3
python3.4 -m pip install SomePackage # specifically Python 3.4
python3.5 -m pip install SomePackage # specifically Python 3.5
python3.6 -m pip install SomePackage # specifically Python 3.6
On Windows, use the py Python launcher in combination with the -m switch:
py -2 -m pip install SomePackage # default Python 2
py -2.7 -m pip install SomePackage # specifically Python 2.7
py -3 -m pip install SomePackage # default Python 3
py -3.4 -m pip install SomePackage # specifically Python 3.4
pipenv –
Morava I ran into this issue myself recently and found that I wasn't getting the right pip for Python 3, on my Linux system that also has Python 2.
First you must ensure that you have installed pip for your python version:
For Python 2:
sudo apt-get install python-pip
For Python 3:
sudo apt-get install python3-pip
Then to install packages for one version of Python or the other, simply use the following for Python 2:
pip install <package>
or for Python 3:
pip3 install <package>
pip is also a python package. So the easiest way to install modules to a specific python version would be below
python2.7 /usr/bin/pip install foo
or
python2.7 -m pip install foo
So apparently there are multiple versions of easy_install and pip. It seems to be a big mess. Anyway, this is what I did to install Django for Python 2.7 on Ubuntu 12.10:
$ sudo easy_install-2.7 pip
Searching for pip
Best match: pip 1.1
Adding pip 1.1 to easy-install.pth file
Installing pip-2.7 script to /usr/local/bin
Using /usr/lib/python2.7/dist-packages
Processing dependencies for pip
Finished processing dependencies for pip
$ sudo pip-2.7 install django
Downloading/unpacking django
Downloading Django-1.5.1.tar.gz (8.0Mb): 8.0Mb downloaded
Running setup.py egg_info for package django
warning: no previously-included files matching '__pycache__' found under directory '*'
warning: no previously-included files matching '*.py[co]' found under directory '*'
Installing collected packages: django
Running setup.py install for django
changing mode of build/scripts-2.7/django-admin.py from 644 to 755
warning: no previously-included files matching '__pycache__' found under directory '*'
warning: no previously-included files matching '*.py[co]' found under directory '*'
changing mode of /usr/local/bin/django-admin.py to 755
Successfully installed django
Cleaning up...
$ python
Python 2.7.3 (default, Sep 26 2012, 21:51:14)
[GCC 4.7.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import django
>>>
On Linux, Mac OS X and other POSIX systems, use the versioned Python commands in combination with the -m switch to run the appropriate copy of pip:
python2.7 -m pip install SomePackage
python3.4 -m pip install SomePackage
(appropriately versioned pip commands may also be available)
On Windows, use the py Python launcher in combination with the -m switch:
py -2.7 -m pip install SomePackage # specifically Python 2.7
py -3.4 -m pip install SomePackage # specifically Python 3.4
if you get an error for py -3.4 then try:
pip install SomePackage
Installation of multiple versions of Python and respective Packages.
Python version on the same windows machine : 2.7 , 3.4 and 3.6
Installation of all 3 versions of Python :
PATH for all 3 versions of Python :
Renaming the executables for versions :
Checked for the command prompt with all versions :
Installing the packages separately for each version
If you have multiple versions as well as multiple architectures (32 bit, 64 bit) you will need to add a -32 or -64 at the end of your version.
For windows, go to cmd and type py --list and it will produce the versions you have installed. The list will look like the following:
Installed Pythons found by py Launcher for Windows
-3.7-64 *
-3.7-32
-3.6-32
The full command as an example will be:
py -3.6-32 -m pip install (package)
If you want to get more indepth, to install a specific version of a package on a specific version of python, use ==(version) after the package. As an example,
py -3.6-32 -m pip install opencv-python==4.1.0.25
Here is my take on the problem. Works for Python3. The main features are:
Prerequisites: If you are using some bare-bones thin client with no extra turf installed, you should run this first (in ubuntu 18.04 at least, extra packages added for convenience):
sudo apt-get update
sudo apt-get install software-properties-common
sudo apt-add-repository universe
sudo apt-get update
sudo apt-get install -y build-essential cmake
sudo apt-get install -y zlib1g zlib1g-dev libsqlite3-dev \
openssl libssl-dev libffi-dev unzip pciutils net-tools \
libblas-dev gfortran libblas3
The steps are as follows:
If you have several extra python versions installed in some other way, get rid of them, e.g., remove $HOME/.local/lib/python3.x, etc. (also the globally installed ones). Don't touch your system's default python3 version though.
Download source for different python versions under the following directory structure:
$HOME/
python_versions/ : download Python-*.tgz packages here and "tar xvf" them. You'll get directories like this:
Python-3.4.8/
Python-3.6.5/
Python-3.x.y/
...
At each "Python-3.x.y/" directory, do the following (do NOT use "sudo" in any of the steps!):
mkdir root
./configure --prefix=$PWD/root
make -j 2
make install
virtualenv --no-site-packages -p root/bin/python3.x env
At "python_versions/" create files like this:
env_python3x.bash:
#!/bin/bash
echo "type deactivate to exit"
source $HOME/python_versions/Python-3.x.y/env/bin/activate
Now, anytime you wish to opt for python3.x, do
source $HOME/python_versions/env_python3x.bash
to enter the virtualenv
While in the virtualenv, install your favorite python packages with
pip install --upgrade package_name
To exit the virtualenv and python version just type "deactivate"
UPDATE
It seems that --no-site-packages is deprecated. There's an easy fix for this: Once you have activated the virtualenv, just point the HOME env variable to somewhere else than your actual home directory, i.e.:
export HOME=some/where/else
A nice way to do this in general is:
ln -s $HOME/.local/lib/python3.6/site-packages/numpy $PWD/venv/lib/python3.6/site-packages/export PYTHONPATH=, export HOME=/some/other/dirNow you should have custom-isolated virtualenv.
UPDATE 2 / SUDO
Wan't to force sudo to use your virtualenv?
Defaults secure_path="/home/USENAME/Python-3.x.y/env/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/bin"
Defaults env_keep += "VIRTUAL_ENV"
Defaults env_keep += "PYTHONPATH"
Now try "sudo python3 --version" and magic should happen
UPDATE 3 / DOCKER
Enable virtualenv inside your docker (of course, you have built it in your docker image):
ENV VIRTUAL_ENV=/home/USER/Python-3.x.y/env
ENV PYTHONPATH=
ENV PATH="$VIRTUAL_ENV/bin:$PATH"
You can use one of the following commands:
pip2 install SomePackage
pip3 install SomePackage
python2 -m pip install SomePackage
python3 -m pip install SomePackage
And of course, make sure that you have the correct version of pip installed
sudo apt-get install python-pip
sudo apt-get install python3-pip
I haven't used these commands myself but, some answers above suggests using them to specify exactly the version of python you want to use
pip-2.7 install SomePackage
python-3.6 -m pip install SomePackage
For python 3 and Windows OS, I always use this syntax to install packages on different version:
First I always use Git Bash Command Prompt.
Here an example installing urllib package.
Default Python version:(The normal pip command)
pip install urllib3
For the other versions
py -3.8 -m pip install urllib3
py => for python
-3.8 => for the version (I'm using the 3.8.7 version) but if you're using the 3.7.7 version it will be "-3.7"
-m : just because or for modify
pip install urllib3 : the normal pip command
Most of the answers here address the issue but I want to add something what was continually confusing me with regard to creating an alternate installation of python in the /usr/local on CentOS 7. When I installed there, it appeared like pip was working since I could use pip2.7 install and it would install modules. However, what I couldn't figure out was why my newly installed version of python wasn't seeing what I was installing.
It turns out in CentOS 7 that there is already a python2.7 and a pip2.7 in the /usr/bin folder. To install pip for your new python distribution, you need to specifically tell sudo to go to /usr/local/bin
sudo /usr/local/bin/python2.7 -m ensurepip
This should get pip2.7 installed in your /usr/local/bin folder along with your version of python. The trick is that when you want to install modules, you either need to modify the sudo $PATH variable to include /usr/local/bin or you need to execute
sudo /usr/local/bin/pip2.7 install <module>
if you want to install a new module. It took me forever to remember that sudo wasn't immediately seeing /usr/local/bin.
Starting from pip22.3, you can use --python option to allow pip to manage Python environments other than the one pip is installed in.
python -m pip --python <PATH_TO_PYTHON_INTERPRETER_YOU_WANT_TO_MANAGE> install package_nameQuoting from the documentation:
Occasionally, you may want to use
pipto manage a Python installation other than the onepipis installed into. In this case, you can use the--pythonoption to specify the interpreter you want to manage. This option can take one of two values:
- The path to a Python executable.
- The path to a virtual environment.
In both cases,
pipwill run exactly as if it had been invoked from that Python environment.One example of where this might be useful is to manage a virtual environment that does not have
pipinstalled.$ python -m venv .venv --without-pip $ python -m pip --python .venv install SomePackage [...] Successfully installed SomePackageYou could also use
--python .venv/bin/python(or on Windows,--python .venv\Scripts\python.exe) if you wanted to be explicit, but the virtual environment name is shorter and works exactly the same.
Context: Archlinux
Action:
Install python2-pip:
sudo pacman -S python2-pip
You now have pip2.7:
sudo pip2.7 install boto
Test (in my case I needed 'boto'):
Run the following commands:
python2
import boto
Success: No error.
Exit: Ctrl+D
for example, if you set other versions (e.g. 3.5) as default and want to install pip for python 2.7:
If you have both python3.6 and python3.7 installed and want to use pip with python3.7 by default, here's what you should do:
First make sure you have pip installed for python3.7
python3.7 -m pip install -U pip
Now pip3.7 must be available, so we edit .bashrc
nano ~/.bashrc
adding the following line to it
alias pip=pip3.7
In order for the changes to take effect type in the shell:
source ~/.bashrc
Now if you type:
pip --version
you should get:
pip 20.1.1 from /usr/local/lib/python3.7/dist-packages/pip (python 3.7)
which means, if you use, for example:
pip install <package>
it would install the <package> for python3.7
pip scripts, they are unreliable. Just use path/to/pythonX.Y -m pip, it's safer. –
Autogiro /usr/bin/python3.8: No module named pip –
Porcine Another possible way could be using conda and pip. Some time you probably want to use just one of those, but if you really need to set up a particular version of python I combine both.
I create a starting conda enviroment with the python I want. As in here https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html. Alternatively you could set up the whole enviroment just using conda.
conda create -n myenv python=3.6.4
Then activate your enviroment with the python you like. This command could change depending on the OS.
source activae myenv
Now you have your python active then you could continue using conda but if you need/want to use pip:
python -m pip -r requirements.txt
Here you have a possible way.
To use multiple versions of pip, just type
pip{version} and run command
Example: for python 3.10
pip3.10
pip3.10 list
for Python 3.7
pip3.7
pip3.7 list
Updating PIP and installing Packages while using specific location of pip:
I was getting an intermittent error "Access Denied" when using the simple comand line pip install <library> on some lab machines that were using pip from a c:\users\... folder instead of the c:\Program Files\Python folder for all users.
Thanks to MultiplyByZer0 answer above I was able to implement a solution that specified the path to python and then run pip.
Here is the powershell script I use to force pip update and then install python libraries:
$fullPath = "C:\Program Files\Python38"
$thisApp = "python.exe"
$arguments = "-m pip install --upgrade pip"
$appPath = join-path $fullPath $thisApp
Start-Process $appPath $arguments -Verb RunAs -Wait
$packages = @( "pylint"
"pillow"
"pygame"
"matplotlib"
"pandas"
"godirect")
foreach ($package in $packages)
{
Write-Host "Installing python Package" $package -ForegroundColor Yellow
$arguments = "-m pip install $package"
Start-Process $appPath $arguments -Verb RunAs -Wait
}
Updated according to latest Ubuntu-LTS 22.04 and for python 3, however similar instructions can be followed for python 2 with appropriate version changes.
You can consider pyenv python environment manager which lets you configure different versions of python parallely without needing to create a separate virtualenv or requiring separate pip installed.
The installation instructions can be found here and it is pretty easy to configure pyenv. https://github.com/pyenv/pyenv#readme
This does however require you to install prerequisite libraries which can be installed as follows:
Redhat based systems
sudo yum install git gcc zlib-devel bzip2 bzip2-devel readline-devel sqlite sqlite-devel openssl-devel tk-devel libffi-devel make curl llvm
Ubuntu/Debian based linux systems
sudo apt-get install -y make build-essential libssl-dev zlib1g-dev libbz2-dev
libreadline-dev libsqlite3-dev wget curl llvm libncurses5-dev libncursesw5-dev xz-utils tk-dev libffi-dev liblzma-dev python3-openssl git
After installing prerequisites follow the instructions in the README.md Once installation is finished, to check python versions present in your system run the following in your terminal
pyenv versions
Note if you have installed python versions before setting up pyenv it may not detect the installed versions and you might have to remove them including dependencies. Take care to not remove important lib files while doing so.
To install a new version of python
pyenv install <version_number> # like 3.9 for installing python3.9
Once installed to set the python version as default run the following.
pyenv global <version_number> # to set it globally
pyenv local <version_number> # to set it in the local directory
You can switch between installed Python versions at any time using the pyenv global, pyenv local, or pyenv shell commands with the desired version number.
Note that this arrangement is different from a virtual environment as it allows you to manage multiple versions of python at a system-wide level while using other system level libraries and packages. However pyenv does have plugins to enable virtualenv support which can be installed from instructions listed here https://github.com/pyenv/pyenv-virtualenv#readme
Pyenv can be removed by simply deleting the pyenv folder and reverting any changes made to .bashrc, .bash_profile and/or similar files.
Hope this helps.
You can go to for example C:\Python2.7\Scripts and then run cmd from that path. After that you can run pip2.7 install yourpackage...
That will install package for that version of Python.
This is probably the completely wrong thing to do (I'm a python noob), but I just went in and edited the pip file
#!/usr/bin/env python3 <-- I changed this line.
# -*- coding: utf-8 -*-
import re
import sys
from pip._internal import main
if __name__ == '__main__':
sys.argv[0] = re.sub(r'(-script\.pyw?|\.exe)?$', '', sys.argv[0])
sys.exit(main())
pip is set up is so that you can install to any given version of Python by choosing that version of Python yourself to run pip. Having pip rely on system machinery to choose a Python version, defeats that scheme. –
Principle For windows specifically: \path\to\python.exe -m pip install PackageName works.
for Blender:
/usr/bin $ python3.7 -m pip install irc
Some useful information for debugging this is the pip debug command. It shows the location of the python interpreter that it is attached to in the 1st line (after the warning).
$ pip debug
WARNING: This command is only meant for debugging. Do not use this with automation for parsing and getting these details, since the output and options of this command may change without notice.
pip version: pip 21.2.4 from /data/akshay/anaconda3/lib/python3.9/site-packages/pip (python 3.9)
sys.version: 3.9.12 (main, Apr 5 2022, 06:56:58)
sys.executable: /data/akshay/anaconda3/bin/python
© 2022 - 2024 — McMap. All rights reserved.
pip34andpip35? – Prevaricatepip3.xactually manages the python version that you want to install packages to (perhaps runpip3.x -Vto see). Or use @Hugo's solution to have better control over lots of python versions. – Meneau