No module named pkg_resources

No module named pkg_resources

I'm deploying a Django app to a dev server and am hitting this error when I run pip install -r requirements.txt:
Traceback (most recent call last):
  File "/var/www/mydir/virtualenvs/dev/bin/pip", line 5, in 
    from pkg_resources import load_entry_point
ImportError: No module named pkg_resources

pkg_resources appears to be distributed with setuptools.  Initially I thought this might not be installed to the Python in the virtualenv, so I installed setuptools 2.6 (same version as Python) to the Python site-packages in the virtualenv with the following command:
sh setuptools-0.6c11-py2.6.egg --install-dir /var/www/mydir/virtualenvs/dev/lib/python2.6/site-packages

EDIT: This only happens inside the virtualenv.  If I open a console outside the virtualenv then pkg_resources is present, but I am still getting the same error.
Any ideas as to why pkg_resources is not on the path?

Solutions/Answers:

Answer 1:

July 2018 Update

Most people should now use pip install setuptools (possibly with sudo).

Some may need to (re)install the python-setuptools package via their package manager (apt-get install, yum install, etc.).

This issue can be highly dependent on your OS and dev environment. See the legacy/other answers below if the above isn’t working for you.

Explanation

This error message is caused by a missing/broken Python setuptools package. Per Matt M.’s comment and setuptools issue #581, the bootstrap script referred to below is no longer the recommended installation method.

The bootstrap script instructions will remain below, in case it’s still helpful to anyone.

Legacy Answer

I encountered the same ImportError today while trying to use pip. Somehow the setuptools package had been deleted in my Python environment.

To fix the issue, run the setup script for setuptools:

wget https://bootstrap.pypa.io/ez_setup.py -O - | python

(or if you don’t have wget installed (e.g. OS X), try

curl https://bootstrap.pypa.io/ez_setup.py | python

possibly with sudo prepended.)

If you have any version of distribute, or any setuptools below 0.6, you will have to uninstall it first.*

See Installation Instructions for further details.


* If you already have a working distribute, upgrading it to the “compatibility wrapper” that switches you over to setuptools is easier. But if things are already broken, don’t try that.

Answer 2:

sudo apt-get install --reinstall python-pkg-resources

fixed it for me in Debian. Seems like uninstalling some .deb packages (twisted set in my case) has broken the path python uses to find packages

Answer 3:

I have seen this error while trying to install rhodecode to a virtualenv on ubuntu 13.10. For me the solution was to run

pip install --upgrade setuptools
pip install --upgrade distribute 

before I run easy_install rhodecode.

Answer 4:

It also happened to me. I think the problem will happen if the requirements.txt contains a “distribute” entry while the virtualenv uses setuptools. Pip will try to patch setuptools to make room for distribute, but unfortunately it will fail half way.

The easy solution is delete your current virtualenv then make a new virtualenv with –distribute argument.

An example if using virtualenvwrapper:

$ deactivate
$ rmvirtualenv yourenv
$ mkvirtualenv yourenv --distribute
$ workon yourenv
$ pip install -r requirements.txt

Answer 5:

In CentOS 6 installing the package python-setuptools fixed it.

yum install python-setuptools

Answer 6:

I had this error earlier and the highest rated answer gave me an error trying to download the ez_setup.py file. I found another source so you can run the command:

curl http://peak.telecommunity.com/dist/ez_setup.py | python

I found that I also had to use sudo to get it working, so you may need to run:

sudo curl http://peak.telecommunity.com/dist/ez_setup.py | sudo python

I’ve also created another location that the script can be downloaded from:

https://gist.github.com/ajtrichards/42e73562a89edb1039f3

Answer 7:

After trying several of these answers, then reaching out to a colleague, what worked for me on Ubuntu 16.04 was:

pip install --force-reinstall -U setuptools
pip install --force-reinstall -U pip

In my case, it was only an old version of pillow 3.1.1 that was having trouble (pillow 4.x worked fine), and that’s now resolved!

Answer 8:

Needed a little bit more sudo. Then used easy_install to install pip. Works.

sudo wget https://bootstrap.pypa.io/ez_setup.py -O - | sudo python
sudo easy_install pip

Answer 9:

I fixed the error with virtualenv by doing this:

Copied pkg_resources.py from

/Library/Python/2.7/site-packages/setuptools

to

/Library/Python/2.7/site-packages/

This may be a cheap workaround, but it worked for me.

.

If setup tools doesn’t exist, you can try installing system-site-packages by typing virtualenv --system-site-packages /DESTINATION DIRECTORY, changing the last part to be the directory you want to install to. pkg_rousources.py will be under that directory in lib/python2.7/site-packages

Answer 10:

For me, this error was being caused because I had a subdirectory called “site”! I don’t know if this is a pip bug or not, but I started with:

/some/dir/requirements.txt
/some/dir/site/

pip install -r requirements.txt wouldn’t work, giving me the above error!

renaming the subfolder from “site” to “src” fixed the problem! Maybe pip is looking for “site-packages”? Crazy.

Answer 11:

I had this problem when I had activated my virtualenv as a different user than the one who created it. It seems to be a permission problem. I discovered this when I tried the answer by @cwc and saw this in the output:

Installing easy_install script to /path/env/bin
error: /path/env/bin/easy_install: Permission denied

Switching back to the user that created the virtualenv, then running the original pip install command went without problems. Hope this helps!

Answer 12:

I had this problem today as well. I only got the problem inside the virtual env.

The solution for me was deactivating the virtual env, deleting and then uninstalling virtualenv with pip and reinstalling it. After that I created a new virtual env for my project, then pip worked fine both inside the virtual environment as in the normal environment.

Answer 13:

Looks like they have moved away from bitbucket and are now on github (https://github.com/pypa/setuptools)

Command to run is:

wget https://bootstrap.pypa.io/ez_setup.py -O - | sudo python

Answer 14:

For me, it turned out to be a permissions problem on site-packages. Since it’s only my dev environment, I raised the permissions and everything is working again:

sudo chmod -R a+rwx /path/to/my/venv/lib/python2.7/site-packages/

References