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After upgrading pip, it no longer works

I recently updated my Homebrew installation of Python 3.8.2 to 3.8.3. After doing so, I ran
$ pip3 install -U pip
in order to check for any pip updates. It updated my installation of pip from 20.0.2 to 20.1.1, and ever since I ran that command, pip throws an error any time I try to use it. Here's the error:
Traceback (most recent call last):
File "/usr/local/lib/python3.8/site-packages/pkg_resources/__init__.py", line 584, in _build_master
ws.require(__requires__)
File "/usr/local/lib/python3.8/site-packages/pkg_resources/__init__.py", line 901, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/local/lib/python3.8/site-packages/pkg_resources/__init__.py", line 792, in resolve
raise VersionConflict(dist, req).with_context(dependent_req)
pkg_resources.VersionConflict: (pip 20.1.1 (/usr/local/lib/python3.8/site-packages), Requirement.parse('pip==20.0.2'))
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/local/opt/python#3.8/bin/pip3", line 6, in <module>
from pkg_resources import load_entry_point
File "/usr/local/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3255, in <module>
def _initialize_master_working_set():
File "/usr/local/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3238, in _call_aside
f(*args, **kwargs)
File "/usr/local/lib/python3.8/site-packages/pkg_resources/__init__.py", line 3267, in _initialize_master_working_set
working_set = WorkingSet._build_master()
File "/usr/local/lib/python3.8/site-packages/pkg_resources/__init__.py", line 586, in _build_master
return cls._build_from_requirements(__requires__)
File "/usr/local/lib/python3.8/site-packages/pkg_resources/__init__.py", line 599, in _build_from_requirements
dists = ws.resolve(reqs, Environment())
File "/usr/local/lib/python3.8/site-packages/pkg_resources/__init__.py", line 787, in resolve
raise DistributionNotFound(req, requirers)
pkg_resources.DistributionNotFound: The 'pip==20.0.2' distribution was not found and is required by the application
It seems that something went wrong during the upgrade process that failed to change the version check within the code. I saw this similar question, but the accepted answer is not working for me. How can I make pip usable again?

As per Python documentation, the correct way to use pip now would be via the correct Python executable, e.g.
python3 -m pip install -U pip

I had experienced a similar problem on my Ubuntu and here's how I solved my problem:
First restore the older version by reinstalling it from your OS package manager (You may need to uninstall first).
Upgrade to the latest version for your user (as opposed to installing in a system location) with the following command
pip3 install --user -U pip
Hope this helps.

pip is giving conflict error while installing package

While running $ pip install <package>, I am getting below error, in this case I am installing PyJWT and also checked for other packages to crosscheck. This happened after upgrading pip to 19.0.2 from 19.0.1.
Check below errors while running pip install PyJWT, requirement are already satisfied, but still I am getting error, please suggest how to fix it.
$ easy_install pip
for reinstalling the pip.
$ pip install PyJWT
Tejeshs-MacBook-Air:selenium_testing tejeshagrawal$ pip install PyJWT
Requirement already satisfied: PyJWT in
/usr/local/lib/python3.7/site-packages (1.7.1) Error checking for
conflicts. Traceback (most recent call last): File
"/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 2897, in _dep_map
return self.__dep_map File "/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 2691, in __getattr__
raise AttributeError(attr) AttributeError: _DistInfoDistribution__dep_map
**During handling of the above exception, another exception occurred:**
Traceback (most recent call last): File
"/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 2888, in _parsed_pkg_info
return self._pkg_info File "/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 2691, in __getattr__
raise AttributeError(attr) AttributeError: _pkg_info
**During handling of the above exception, another exception occurred:**
Traceback (most recent call last): File
"/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_internal/commands/install.py",
line 503, in _warn_about_conflicts
package_set, _dep_info = check_install_conflicts(to_install) File
"/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_internal/operations/check.py",
line 108, in check_install_conflicts
package_set, _ = create_package_set_from_installed() File "/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_internal/operations/check.py",
line 47, in create_package_set_from_installed
package_set[name] = PackageDetails(dist.version, dist.requires()) File
"/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 2635, in requires
dm = self._dep_map File "/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 2899, in _dep_map
self.__dep_map = self._compute_dependencies() File "/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 2908, in _compute_dependencies
for req in self._parsed_pkg_info.get_all('Requires-Dist') or []: File
"/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 2890, in _parsed_pkg_info
metadata = self.get_metadata(self.PKG_INFO) File "/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 1410, in get_metadata
value = self._get(self._fn(self.egg_info, name)) File "/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 1522, in _get
with open(path, 'rb') as stream: FileNotFoundError: [Errno 2] No such file or directory:
'/usr/local/lib/python3.7/site-packages/~ip-18.1.dist-info/METADATA'
Tejeshs-MacBook-Air:selenium_testing tejeshagrawal$ pip freeze >
require.txt Could not parse requirement: -ip Exception: Traceback
(most recent call last): File
"/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 2584, in version
return self._version File "/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 2691, in __getattr__
raise AttributeError(attr) AttributeError: _version
**During handling of the above exception, another exception occurred:**
Traceback (most recent call last): File
"/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_internal/cli/base_command.py",
line 179, in main
status = self.run(options, args) File "/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_internal/commands/freeze.py",
line 93, in run
for line in freeze(**freeze_kwargs): File "/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_internal/operations/freeze.py",
line 62, in freeze
req = FrozenRequirement.from_dist(dist) File "/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_internal/operations/freeze.py",
line 239, in from_dist
req = dist.as_requirement() File "/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 2716, in as_requirement
if isinstance(self.parsed_version, packaging.version.Version): File
"/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 2551, in parsed_version
self._parsed_version = parse_version(self.version) File "/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages/pip/_vendor/pkg_resources/__init__.py",
line 2589, in version
raise ValueError(tmpl % self.PKG_INFO, self) ValueError: ("Missing 'Version:' header and/or METADATA file", Unknown [unknown version]
(/usr/local/lib/python3.7/site-packages))

Seems like your problem is similar or the same as this bug which was ironically fixed in 19.0.2. The problem is somewhere along the line you tried to install a module and it failed. pip didn't properly clean up after itself and left a package in a broken state.
The solution seems to be to find any directories starting with - in your site-packages directory (/Users/tejeshagrawal/Library/Python/3.7/lib/python/site-packages in your case) and rename them to what they should be. eg. if you find -yJWT-1.0.dist-info then you should rename it to PyJWT-1.0.dist-info. If you're not sure what it's real name should be then look for the Name value in -yJWT-1.0.dist-info/METADATA. NB. I just used PyJWT as an example, it might not be the package(s) that is/are broken. After that pip should be able to get up and running again.

Complementary finding:
Using #Dunes answer, couldn't fix the file name so I ended-up unninstalling every package from PIP
PowerShell pip uninstall -y (pip freeze)
When the loop broke on the Plackage "Plotly" I found the culprit.

You could try to install the package pip-conflict-checker:
pip install pip-conflict-checker
and then run the command:
pipconflictchecker
this will show you the packages that cause troubles

You can create a virtual environment as well by following this link:- https://docs.conda.io/projects/conda/en/latest/user-guide/tasks/manage-environments.html#creating-an-environment-with-commands
Step 1: conda create -n myenv python=3.7.4
Step 2: conda activate myenv
Step 3: pip install package_name
This helps to manage an individual conda environment to manage packages.

Python boilerpipe installation issue

I am trying to insatll Python Boilerpipe in my Ubuntu 14. It fails with the following error:
Traceback (most recent call last):
File "setup.py", line 27, in <module>
download_jars(datapath=DATAPATH)
File "setup.py", line 21, in download_jars
tar = tarfile.open(tgz_name, mode='r:gz')
File "/usr/lib/python2.7/tarfile.py", line 1678, in open
return func(name, filemode, fileobj, **kwargs)
File "/usr/lib/python2.7/tarfile.py", line 1730, in gzopen
raise ReadError("not a gzip file")
tarfile.ReadError: not a gzip file
These are the steps I am following:
pip install JPype1
pip install charade
git clone
https://github.com/misja/python-boilerpipe.git
cd python-boilerpipe
sudo python setup.py install

Found the issue, so in the setup.py they are looking for boiler-pipe tar file. And they download it from googlecode, which is not there any more.
def download_jars(datapath, version=boilerpipe_version):
tgz_url = 'https://boilerpipe.googlecode.com/files/boilerpipe-{0}- bin.tar.gz'.format(version)
So I replaced the same line with the new file location:
tgz_url='https://storage.googleapis.com/google-code-archive-downloads/v2/code.google.com/boilerpipe/boilerpipe-1.2.0-bin.tar.gz'
This worked for me.

You can use one of any similar alternative for example try jusText
pip install justext
Below are some alternatives:
http://sourceforge.net/projects/webascorpus/?source=navbar
https://github.com/jiminoc/goose
https://github.com/grangier/python-goose
https://github.com/miso-belica/readability.py
https://github.com/dcramer/decruft
https://github.com/FeiSun/ContentExtraction
https://github.com/JalfResi/justext
https://github.com/andreypopp/extracty/tree/master/justext
https://github.com/dreamindustries/jaws/tree/master/justext
https://github.com/says/justext https://github.com/chbrown/justext
https://github.com/says/justext-app

Python pip install error

I have just installed Python 3.4.3 on my MAC (Yosemite). I need to install a couple of lxml, however everytime I type in: pip install /""/, I get error messages.
I have followed multiple tutorials and pip is installed.
MAC already had Python 2.7., but I installed the 3.4.3. version, not sure if that is the issue.
The error message is:
Brunos-MacBook-Pro:~ BrunoPaesLeme$ pip install /Macintosh HD/Users//Downloads/pycairo-1.10.0-cp27-none-win_amd64.whl
Exception:
Traceback (most recent call last):
File "/Library/Python/2.7/site-packages/pip-7.0.3-py2.7.egg/pip/basecommand.py", line 223, in main
status = self.run(options, args)
File "/Library/Python/2.7/site-packages/pip-7.0.3-py2.7.egg/pip/commands/install.py", line 268, in run
wheel_cache
File "/Library/Python/2.7/site-packages/pip-7.0.3-py2.7.egg/pip/basecommand.py", line 268, in populate_requirement_set
wheel_cache=wheel_cache
File "/Library/Python/2.7/site-packages/pip-7.0.3-py2.7.egg/pip/req/req_install.py", line 207, in from_line
wheel_cache=wheel_cache)
File "/Library/Python/2.7/site-packages/pip-7.0.3-py2.7.egg/pip/req/req_install.py", line 66, in init
req = pkg_resources.Requirement.parse(req)
File "/Library/Python/2.7/site-packages/pip-7.0.3-py2.7.egg/pip/_vendor/pkg_resources/init.py", line 2960, in parse
reqs = list(parse_requirements(s))
File "/Library/Python/2.7/site-packages/pip-7.0.3-py2.7.egg/pip/_vendor/pkg_resources/init.py", line 2891, in parse_requirements
raise ValueError("Missing distribution spec", line)
ValueError: ('Missing distribution spec', '/Macintosh')
Anybody knows what I could be doing wrong? Any help would be appreciated.

try:
easy_install pip
pip install /"filepath"/

I have similar issue with pip install. However, if I do "sudo su -" then do my pip install 'fileName', that solve the problem for me.

getting DistributionNotFound error, but package exists

I am running pyjade for Django templates as I find it much easier to write in, but I am trying to convert it to html with the built in converter. When I run pyjade -c django input.jade output.html I get the error pkg_resources.DistributionNotFound: six. However, the package six does in fact exist, and I can import it on python, and when I run pip install six --upgrade it says it is already up-to-date.
Here is the full traceback:
Traceback (most recent call last):
File "/usr/local/bin/pyjade", line 5, in <module>
from pkg_resources import load_entry_point
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 2707, in <module>
working_set.require(__requires__)
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 686, in require
needed = self.resolve(parse_requirements(requirements))
File "/usr/lib/python2.7/dist-packages/pkg_resources.py", line 584, in resolve
raise DistributionNotFound(req)
pkg_resources.DistributionNotFound: six
What would be causing this error?

Re-install via easy_setup (vs pip) solved it for me on OS X Mavericks:
sudo easy_install six
Hope that helps you!

An old setuptools was my culprit.
pip install -U setuptools