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pip uninstall working but giving error

I have downloaded, built and installed the sample pypi project. The project is supposed to be used to give an insight to python packaging and is referenced in Python Packaging User Guide and Packaging and Distributing Projects. I am therefore confused to why on earth following their instructions on creating the package I have an error when uninstalling it.
As mentioned above I have used their sample project. If anyone can shed some light it would be appreciated.
Key notes: I am running Mac OSX, my installed python version is 3.5.1
Below are steps to reproduce the problem:
mkdir testdirectory
cd testdirectory/
pyvenv venv # Creating a virtual environment
source venv/bin/activate
git clone https://github.com/pypa/sampleproject.git # Getting sample project
cd sampleproject/
python setup.py build
python setup.py install # Installing on the virtual environment
pip list
peppercorn (0.5)
pip (7.1.2)
sample (1.2.0)
setuptools (18.2)
pip uninstall sample
Resulting in the following output:
Uninstalling sample-1.2.0:
/Users/steve/testdirectory/venv/bin/sample
/Users/steve/testdirectory/venv/lib/python3.5/site-packages/sample-1.2.0-py3.5.egg
Proceed (y/n)? y
Successfully uninstalled sample-1.2.0
Traceback (most recent call last):
File "/Users/steve/testdirectory/venv/bin/pip3", line 11, in <module>
sys.exit(main())
File "/Users/steve/testdirectory/venv/lib/python3.5/site-packages/pip/__init__.py", line 217, in main
return command.main(cmd_args)
File "/Users/steve/testdirectory/venv/lib/python3.5/site-packages/pip/basecommand.py", line 248, in main
pip_version_check(session)
File "/Users/steve/testdirectory/venv/lib/python3.5/site-packages/pip/utils/outdated.py", line 102, in pip_version_check
installed_version = get_installed_version("pip")
File "/Users/steve/testdirectory/venv/lib/python3.5/site-packages/pip/utils/__init__.py", line 858, in get_installed_version
working_set = pkg_resources.WorkingSet()
File "/Users/steve/testdirectory/venv/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 629, in __init__
self.add_entry(entry)
File "/Users/steve/testdirectory/venv/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 685, in add_entry
for dist in find_distributions(entry, True):
File "/Users/steve/testdirectory/venv/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 2075, in find_eggs_in_zip
if metadata.has_metadata('PKG-INFO'):
File "/Users/steve/testdirectory/venv/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 1605, in has_metadata
return self.egg_info and self._has(self._fn(self.egg_info, name))
File "/Users/steve/testdirectory/venv/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 1963, in _has
return zip_path in self.zipinfo or zip_path in self._index()
File "/Users/steve/testdirectory/venv/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 1843, in zipinfo
return self._zip_manifests.load(self.loader.archive)
File "/Users/steve/testdirectory/venv/lib/python3.5/site-packages/pip/_vendor/pkg_resources/__init__.py", line 1783, in load
mtime = os.stat(path).st_mtime
FileNotFoundError: [Errno 2] No such file or directory: '/Users/steve/testdirectory/venv/lib/python3.5/site-packages/sample-1.2.0-py3.5.egg'
It appears that the package has uninstalled correctly however the error is still thrown.

This is documented:
$ pip help uninstall
Usage:
pip uninstall [options] <package> ...
pip uninstall [options] -r <requirements file> ...
Description:
Uninstall packages.
pip is able to uninstall most installed packages. Known exceptions are:
- Pure distutils packages installed with ``python setup.py install``, which
leave behind no metadata to determine what files were installed.
- Script wrappers installed by ``python setup.py develop``.
i.e. you are getting the error because you didn't use pip itself to install - you used setup.py and so pip doesn't know what was installed.

Install package not with python setup.py install but with pip install .
Then uninstalling will work without errors

pip broken, reinstall doesn't work. EC2

I am using pip on EC2 now, python version is 2.7. 'sudo pip' suddenly doesn't work anymore.
[ec2-user#ip-172-31-17-194 ~]$ sudo pip install validate_email
Traceback (most recent call last):
File "/usr/bin/pip", line 5, in <module>
from pkg_resources import load_entry_point
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3138, in <module>
#_call_aside
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3124, in _call_aside
f(*args, **kwargs)
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 3151, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 663, in _build_master
return cls._build_from_requirements(__requires__)
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 676, in _build_from_requirements
dists = ws.resolve(reqs, Environment())
File "/usr/local/lib/python2.7/site-packages/pkg_resources/__init__.py", line 849, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pip==6.1.1' distribution was not found and is required by the application
[ec2-user#ip-172-31-17-194 ~]$ which pip
/usr/local/bin/pip

first, which pip is not going to return the same result as sudo which pip, so you should check that out first.
you may also consider not running pip as sudo at all.
Is it acceptable & safe to run pip install under sudo?
second, can you try this:
easy_install --upgrade pip
if you get an error here (regarding pip's wheel support), try this, then run the above command again:
easy_install -U setuptools

I fixed the same error ("The 'pip==6.1.1' distribution was not found") by using the tip of Wesm :
$> which pip && sudo which pip
/usr/local/bin/pip
/usr/bin/pip
So, it seels that "pip" of average user and of root are not the same. Will fix it later.
Then I ran "sudo easy_install --upgrade pip" => succeed
Then I used "sudo /usr/local/bin/pip install " and it works.

Some additional information for anyone who is also stuck on the same issue:-
Running commands with sudo searches for the command in usr/bin directory. One way to solve this issue is to specify the complete path to the command while using sudo as commented by #Cissoid in the question's comment section
Or
...what you can do is create a symbolic link(sym link) to that command in the usr/bin directory using ln command.
$> ln -s /usr/local/bin/pip /usr/bin/pip
The syntax is:-
$> ln -s /path/to/file /path/to/link

I tried a few of these solutions without much success. In the end I just created a new instance using Ubuntu as the operating system. It was already setup properly for using Python properly.
If that is not possible then you can try linking the user pip into a folder on root's (sudo) path.

python pip error pkg_resources.DistributionNotFound

I'm trying to install a new module, but I found that pip doesn't work - it shows
pkg_resources.DistributionNotFound: The 'pip==1.5.6' distribution was not found and is required by the application
for each call I performed. Also, for pip --help. I found some advises to reinstall pip using pip or easy_install, but easy_install doesn't works too:
pkg_resources.DistributionNotFound: The 'setuptools==5.7' distribution was not found and is required by the application
Is there a way to fix this issue without reinstalling python and all its modules?
I have Linux Ubuntu 14.04.
apt-get install python-pip suggests installing pip (and a heap of another following software) like I don't have it in my system. I afraid to do it, would be a conflict here?
Upd.
apt-get says that it want to install the following: build-essential dpkg-dev fakeroot g++ g++-4.8 libalgorithm-diff-perl libalgorithm-diff-xs-perl libalgorithm-merge-perl libfakeroot libstdc++-4.8-dev python-chardet-whl python-colorama python-colorama-whl python-distlib python-distlib-whl python-html5lib python-html5lib-whl python-pip python-pip-whl python-requests-whl python-setuptools python-setuptools-whl python-six-whl python-urllib3-whl python-wheel. But as I know pip worked for me without these packages.
Also I performed
which -a python: /usr/bin/python
which -a pip: /usr/local/bin/pip
python --version: Python 2.7.6

It would be useful to have the full backtrace of the error. One scenario that can lead to this issue, is having multiple versions of Python installed.
For example, on my Ubuntu 20.04.1 LTS I have installed Python 3.6 from source, in addition to Python 3.8 distributed with Ubuntu 20. This is what I get with pip3 --version after installing Python 3.6:
Traceback (most recent call last):
File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 581, in _build_master
ws.require(__requires__)
File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 898, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 789, in resolve
raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.VersionConflict: (pip 20.2.3 (/usr/local/lib/python3.6/site-packages), Requirement.parse('pip==20.0.2'))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/bin/pip3", line 6, in <module>
from pkg_resources import load_entry_point
File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 3126, in <module>
#_call_aside
File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 3110, in _call_aside
f(*args, **kwargs)
File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 3139, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 583, in _build_master
return cls._build_from_requirements(__requires__)
File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 596, in _build_from_requirements
dists = ws.resolve(reqs, Environment())
File "/usr/local/lib/python3.6/site-packages/pkg_resources/__init__.py", line 784, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pip==20.0.2' distribution was not found and is required by the application
The last line is the error in question, but notice an important detail in the traceback: raise VersionConflict.
This can be solved by explicitly using the required version of pip:
$ python3.6 -m pip --version
pip 20.2.3 from /usr/local/lib/python3.6/site-packages/pip (python 3.6)
Or simply:
$ pip3.6 --version
pip 20.2.3 from /usr/local/lib/python3.6/site-packages/pip (python 3.6)
Another issue one may stumble upon, is the missing lsb_release issue when doing pip3.6 install:
File "/usr/local/lib/python3.6/subprocess.py", line 438, in run
output=stdout, stderr=stderr)
subprocess.CalledProcessError: Command '('lsb_release', '-a')' returned non-zero exit status 1.
This can be solved by locating lsb_release.py and creating a symlink, for example:
sudo ln -s /usr/lib/python3/dist-packages/lsb_release.py /usr/local/lib/python3.6/site-packages/lsb_release.py
Now it's possible to upgrade pip3.6 and install new packages:
$ pip3.6 install --upgrade pip
$ pip3.6 install mypy
There are different methods for managing Python versions. Beware of using something like sudo update-alternatives --config python. Changing the system's default Python, will likely cause problems, including symptoms like the terminal not opening. It's good to have a backup terminal available, such as the one in Visual Studio Code.

Python DistributionNotFound Error after installing EB CLI 3.0

Have tried many things, but keep getting this error after multiple attempts to update python, pip, etc. I am on OS X running 10.9.5.
CMD% eb
Traceback (most recent call last):
File "/usr/local/bin/eb", line 5, in <module>
from pkg_resources import load_entry_point
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 2603, in <module>
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 666, in require
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 565, in resolve
pkg_resources.DistributionNotFound: python-dateutil>=2.1,<3.0.0

I was experiencing a similar error when trying to run eb, though not for dateutil...
Traceback (most recent call last):
File "/usr/local/bin/eb", line 5, in <module>
from pkg_resources import load_entry_point
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 2603, in <module>
working_set.require(__requires__)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 666, in require
needed = self.resolve(parse_requirements(requirements))
File "/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python/pkg_resources.py", line 565, in resolve
raise DistributionNotFound(req) # XXX put more info here
pkg_resources.DistributionNotFound: requests>=2.6.1,<2.7
For me the solution was to update setuptools:
sudo pip install --upgrade setuptools
Hope that helps somebody.

Use the following command:
pip install awsebcli
It will automatically upgrade all dependecies of awsebcli.

use the following command
sudo pip install python-dateutil
to upgrade it

Pip is probably linked to a different version of python then standard.
You should try installing pip using
python get-pip.py
(You can download get-pip.py from the pip website)
Otherwise, You can see which Python everything is linked too.
which python
head -1 $(which eb)
head -1 $(which pip)
You can change to shebang line in the eb script to match pip and it should all work.
You can also install using a virtualenv (pythons recommended way of installing)
virtualenv ~/ebenv
source ~/ebenv/bin/activate
pip install awsebcli
deactivate
sudo ln -s ~/ebenv/bin/eb /usr/local/bin/

in my case on mac osx 10.10, I had to reinstall.
sudo pip install python-dateutil
Just in case some runs into this type of error. check the last paragraph in the trace for the kind of error that it is being raised. In my case, this was:
raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.ContextualVersionConflict: (six 1.4.1
(/System/Library/Frameworks/Python.framework/Versions/2.7/Extras/lib/python),
Requirement.parse('six>=1.5'), set(['python-dateutil']))

I had the exact same issue, for me, the eb script was using the wrong python. To solve it I just modified the eb script:
> which eb
/usr/local/bin/eb
> sudo vim /usr/local/bin/eb
## Change the first line from '#!/usr/bin/python' to '#!/usr/local/bin/python'
After restarting the terminal, everything work as expected.

From the raised error in your log, it needs python-dateutil>=2.1.
So you need to make sure that version is installed and install it if not. I had similar issue, and the solution (in my case) is:
$ pip install --ignore-installed python-dateutil==2.2

Why am I getting this error (related to pip and easy_install) when trying to setup a virtualenv?

I'm trying to create a Flask application to push to Heroku. When I try to create a virtualenv in the folder, I'm thrown this error:
photo-crawl › sudo virtualenv venv --distribute
Password:
New python executable in venv/bin/python
Installing distribute............................................................................................................................................................................................................................done.
Installing pip....
Complete output from command /Users/evansiegel/In...rawl/venv/bin/python -x /Users/evansiegel/In...env/bin/easy_install /Library/Python/2.7/...ort/pip-1.2.1.tar.gz:
/Users/evansiegel/Involvio/photo-crawl/venv/bin/python: can't open file '/Users/evansiegel/Involvio/photo-crawl/venv/bin/easy_install': [Errno 2] No such file or directory
----------------------------------------
...Installing pip...done.
Traceback (most recent call last):
File "/usr/local/bin/virtualenv", line 9, in <module>
load_entry_point('virtualenv==1.8.4', 'console_scripts', 'virtualenv')()
File "/Library/Python/2.7/site-packages/virtualenv.py", line 964, in main
never_download=options.never_download)
File "/Library/Python/2.7/site-packages/virtualenv.py", line 1076, in create_environment
install_pip(py_executable, search_dirs=search_dirs, never_download=never_download)
File "/Library/Python/2.7/site-packages/virtualenv.py", line 667, in install_pip
filter_stdout=_filter_setup)
File "/Library/Python/2.7/site-packages/virtualenv.py", line 1042, in call_subprocess
% (cmd_desc, proc.returncode))
OSError: Command /Users/evansiegel/In...rawl/venv/bin/python -x /Users/evansiegel/In...env/bin/easy_install /Library/Python/2.7/...ort/pip-1.2.1.tar.gz failed with error code 2
It seems that for some reason virtualenv is not putting everything it should be putting into the venv/bin folder. Right now, only python and two aliases, python2 and python2.7 are in there.
Thanks!

I believe this is caused by a bug in older versions of virtualenv and/or pip. It looks like you're using virtualenv 1.8.4 and pip 1.2.1. Is it possible for you to upgrade to latest virtualenv and pip (currently virtualenv 1.9.1 and pip 1.3.1)?
This should do it, if you have install privileges:
pip install pip --upgrade
pip install virtualenv --upgrade
At that point running the same command (i.e. sudo virtualenv venv --distribute) should give you what you want.