I tried installing Flask and a few packages using sudo in a virtual environment, but on trying to import Flask, it'll throw up an ImportError. On installing the same packages with pip install though it works fine.
So what's the difference between these methods? I tried this on Ubuntu.
Also, where does pip install these packages? Looking through Stack Overflow I could only find questions that answer how to list packages installed by pip, but not where to find them (in context to the virtual environment)
pip install
Will run pip install as the current user
sudo pip install
Will run pip install with the security privileges of another user, root for example.
You normally need to use sudo to install a package on a system.
You may want to read linux-101-introduction-to-sudo
Related
I'm configuring a jupyterlab single-user instance. The users will need to install Python packages using
pip install <package-name>
I want to configure pip so that pip install is always called with argument --user, even if it is invoked without --user. Is it possible to achieve this? If so, how?
The reason behind it is that the $HOME directory is mounted on a persistent volume, and I want the user to still have its packages installed after restarting the jupyterlab server. By installing packages using pip install --user <package-name>, the packages will be stored in $HOME/.local/lib/python${PY_MAJOR}.${PY_MINOR}/site-packages and will therefore persist even after a server restart.
A solution that works on ubuntu:
Add this in $HOME/.pip/pip.conf:
[install]
user = yes
Documentation:
https://pip.pypa.io/en/stable/user_guide/#user-installs
https://pip.pypa.io/en/stable/topics/configuration/
https://pip.pypa.io/en/stable/cli/pip_install/#cmdoption-user
pip install <package-name>
#To run this code command prompt on python terminal to install a package
pip install --user
#python packages name on terminal to install with the help of
pycharm
I'm confused by the intended pip usage. Pip comes installed with Python, which is great, but I get the following warnings when new versions come out:
WARNING: You are using pip version 21.1.1; however, version 21.1.3 is available.
You should consider upgrading via the '/usr/local/opt/python#3.8/bin/python3.8 -m pip install --upgrade pip' command.
I follow the instructions to install it using the command they gave. But then it uninstalls my existing pip and is not able to install the new version.
Installing collected packages: pip
Attempting uninstall: pip
Found existing installation: pip 21.1.1
Uninstalling pip-21.1.1:
ERROR: Could not install packages due to an OSError: Cannot move the non-empty directory '/usr/local/lib/python3.8/site-packages/pip-21.1.1.dist-info/': Lacking write permission to '/usr/local/lib/python3.8/site-packages/pip-21.1.1.dist-info/'.
The pip command is now unrecognized, and the official documentation for upgrading pip suggests running:
python -m pip install -U pip
which gives the same permission error.
I Google this error, and found that the community highly advises to not sudo from these questions (this and this). They also advised pip3 install --upgrade pip --user which also gave the same error. The common consensus is to only install pip packages inside virtual environments, but I'm hesitant to have pip completely uninstalled.
So I got pip to install using sudo, but it's unclear whether I've inadvertently affected (or will affect future) system-wide installations, or how I'd check for these.
I don't understand why installing pip inside /usr/local/ requires sudo, and whether I should only be using pip exclusively inside virtual environments and never outside it
pip can be installed with sudo, into a folder that you don't have permissions to write to. However, it can install packages outside of that folder (and thus, into a folder you have write permissions). However, it is recommended that you don't install pip into a root folder, and instead install it into your home directory.
The command to install pip as root is
sudo apt-get install pip
It should then prompt you for your password. I recommend using sudo whenever you install something.
I know this question has been asked and answered a number of times but none of those solutions have worked for me. I have installed Python 2.7 into a local directory and added it to my path. When I try to install numpy i get the following error:
ImportError: No module named setuptools
I cannot simply sudo apt-get install python-setuptools because i don't have root access.
I need to install numpy and ideally have pip working for future applications.
0) Try to install packages that are isolated to the current user, use the --user flag:
pip install --user SomeProject
1a) I agree with #Pi Marillion here, use an isolated conda environment if you don't have root access. This way you keep your path clean.
To install conda:
Since I don't know about your OS, go to https://docs.conda.io/en/latest/miniconda.html
After installation, update your conda (just in case):
conda update conda
To list the installed packages, you can do
conda list
You should see python installed. you can start an interpreter by typing python in the terminal.
There's conda cheat sheet that I found incredibly helpful:
https://docs.conda.io/projects/conda/en/latest/user-guide/cheatsheet.html
b) Now try installing via pip and I think you might need python 3.x for setuptools.
https://packaging.python.org/tutorials/installing-packages/#id13
2) If this does not work you can still try
https://packaging.python.org/guides/installing-stand-alone-command-line-tools/
Hope this helps :)
First try easy_install --user setuptools pip. If that doesn't work you need to install things manually.
Download setuptools-*.zip from https://pypi.org/project/setuptools/#files. Unzip the archive, cd into the new directory and run python2.7 setup.py install.
Then try pip install. If it still doesn't work reinstall pip: download get-pip.py and run python get-pip.py --user.
I have dutifully uninstalled all the Python packages I installed with sudo pip install and installed them with pip --user install instead. Yay me :)
On Ubuntu, I know I can find the relevant binaries at /home/<USERNAME>/.local/bin and the packages themselves at /home/<USERNAME>/.local/lib/python2.7/site-packages ... but navigating there is not as simple as good old pip freeze.
How can I pip freeze and get only the packages I installed with pip --user install rather than all the Python packages, including those installed via apt?
Currently pip does not have any such options. So with default pip its not possible. (and I submitted a feature request and now there is a working PR too!)
However I wrote a little script, which does solve your problem:
# pip_user_installs.py
import sys
import pkg_resources
for module in pkg_resources.working_set:
if sys.argv[1] in module.location:
print module.project_name
usage:
$ python pip_user_installs.py $HOME
It's fairly easy in recent versions of pip (the PR in the other answer is now part of pip).
pip freeze --user
This will output a list of packages currently installed to the user's site-packages.
I've been trying to use sudo to install python packages on a system that I am on the sudoers list, but don't have general root access (i.e. don't have the password for su). I can install packages, for example
sudo pip install django
however when I try and use them python simply claims not to have the package installed. Investigating the contents of /usr/lib/python it appears that other packages directories and .eggs have executable permissions for ugo, however the packages I install using sudo pip do not have this permission. Manually giving these files executable permissions fixes the problem, but that is laborious, particularly when pip installed several dependencies that I need to chase up.
Is this a known issue? What can I do about it? For the record this is a RHEL6.4 machine and I'm using pip 1.4.1.
You best bet is virtualenv Do your workaround to install the virtualenv.
sudo pip install virtualenv
Resources for virtualenv to get you started:
http://simononsoftware.com/virtualenv-tutorial/
http://www.virtualenv.org/en/latest/