[Solved] Could not find a version that satisfies the requirement

I’m installing several Python packages in Ubuntu 12.04 using the following requirements.txt file:


and these two commands:

$ pip install --download=/tmp -r requirements.txt
$ pip install --user --no-index --find-links=/tmp -r requirements.txt

(the first one downloads the packages and the second one installs them).

The process is frequently stopped with the error:

  Could not find a version that satisfies the requirement <package> (from matplotlib<2.0.0,>=1.3.1->-r requirements.txt (line 2)) (from versions: )
No matching distribution found for <package> (from matplotlib<2.0.0,>=1.3.1->-r requirements.txt (line 2))

which I fix manually with:

pip install --user <package>

and then run the second pip install command again.

But that only works for that particular package. When I run the second pip install command again, the process is stopped now complaining about another required package and I need to repeat the process again, ie: install the new required package manually (with the command above) and then run the second pip install command.

So far I’ve had to manually install six, pytz, nose, and now it’s complaining about needing mock.

Is there a way to tell pip to automatically install all needed dependencies so I don’t have to do it manually one by one?

Add: This only happens in Ubuntu 12.04 BTW. In Ubuntu 14.04 the pip install commands applied on the requirements.txt file work without issues.

Enquirer: Gabriel


Solution #1:

This approach (having all dependencies in a directory and not downloading from an index) only works when the directory contains all packages. The directory should therefore contain all dependencies but also all packages that those dependencies depend on (e.g., six, pytz etc).

You should therefore manually include these in requirements.txt (so that the first step downloads them explicitly) or you should install all packages using PyPI and then pip freeze > requirements.txt to store the list of all packages needed.

Respondent: Gabriel

Solution #2:

I had installed python3 but my python in /usr/bin/python was still the old 2.7 version

This worked (<pkg> was pyserial in my case):

python3 -m pip install <pkg>
Respondent: Simeon Visser

Solution #3:

After 2 hours of searching, I found a way to fix it with just one line of command. You need to know the version of the package (Just search up PACKAGE version).


python3 -m pip install --pre --upgrade PACKAGE==VERSION.VERSION.VERSION
Respondent: maw

Solution #4:

Below command worked for me –

python -m pip install flask
Respondent: Jagd_Panzer_E100

Solution #5:

Although it doesn’t really answers this specific question. Others got the same error message with this mistake.

For those who like me initial forgot the -r: Use pip install -r requirements.txt the -r is essential for the command.

The original answer:

Respondent: Freelancer

Solution #6:

Not always, but in some cases the package already exists. For example – getpass. It is not listed by “pip list” but it can be imported and used:

enter image description here

If I try to pip install getpass I get the following error:
“Could not find a version that satisfies the requirement getpass”

Respondent: Chiel

Solution #7:

Try installing flask through the powershell using the following command.

pip install --isolated Flask

This will allow installation to avoide environment variables and user configuration.

Respondent: svinec

Solution #8:

Just a reminder to whom google this error and come here.

Let’s say I get this error:

$ python3
Traceback (most recent call last):
  File "", line 7, in <module>
    import aalib
ModuleNotFoundError: No module named 'aalib'

Since it mentions aalib, I was thought to try aalib:

$ python3.8 -m pip install aalib
ERROR: Could not find a version that satisfies the requirement aalib (from versions: none)
ERROR: No matching distribution found for aalib

But it actually wrong package name, ensure pip search(service disabled at the time of writing), or google, or search on pypi site to get the accurate package name:

enter image description here

Then install successfully:

$ python3.8 -m pip install python-aalib
Collecting python-aalib
  Downloading python-aalib-0.3.2.tar.gz (14 kB)

As pip --help stated:

$ python3.8 -m pip --help
  -v, --verbose               Give more output. Option is additive, and can be used up to 3 times.

To have a systematic way to figure out the root causes instead of rely on luck, you can append -vvv option of pip command to see details, e.g.:

$ python3.8 -u -m pip install aalib -vvv
User install by explicit request
Created temporary directory: /tmp/pip-ephem-wheel-cache-b3ghm9eb
Created temporary directory: /tmp/pip-req-tracker-ygwnj94r
Initialized build tracking at /tmp/pip-req-tracker-ygwnj94r
Created build tracker: /tmp/pip-req-tracker-ygwnj94r
Entered build tracker: /tmp/pip-req-tracker-ygwnj94r
Created temporary directory: /tmp/pip-install-jfurrdbb
1 location(s) to search for versions of aalib:
Fetching project page and analyzing links:
Getting page
Found index url
Getting credentials from keyring for
Getting credentials from keyring for
Looking up "" in the cache
Request header has "max_age" as 0, cache bypassed
Starting new HTTPS connection (1): "GET /simple/aalib/ HTTP/1.1" 404 13
[hole] Status code 404 not in (200, 203, 300, 301)
Could not fetch URL 404 Client Error: Not Found for url: - skipping
Given no hashes to check 0 links for project 'aalib': discarding no candidates
ERROR: Could not find a version that satisfies the requirement aalib (from versions: none)
Cleaning up...
Removed build tracker: '/tmp/pip-req-tracker-ygwnj94r'
ERROR: No matching distribution found for aalib
Exception information:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/pip/_internal/cli/", line 186, in _main
    status =, args)
  File "/usr/lib/python3/dist-packages/pip/_internal/commands/", line 357, in run
  File "/usr/lib/python3/dist-packages/pip/_internal/", line 177, in resolve
    discovered_reqs.extend(self._resolve_one(requirement_set, req))
  File "/usr/lib/python3/dist-packages/pip/_internal/", line 333, in _resolve_one
    abstract_dist = self._get_abstract_dist_for(req_to_install)
  File "/usr/lib/python3/dist-packages/pip/_internal/", line 281, in _get_abstract_dist_for
    req.populate_link(self.finder, upgrade_allowed, require_hashes)
  File "/usr/lib/python3/dist-packages/pip/_internal/req/", line 249, in populate_link = finder.find_requirement(self, upgrade)
  File "/usr/lib/python3/dist-packages/pip/_internal/index/", line 926, in find_requirement
    raise DistributionNotFound(
pip._internal.exceptions.DistributionNotFound: No matching distribution found for aalib

From above log, there is pretty obvious the URL 404 not found. Then you can guess the possible reasons which cause that 404, i.e. wrong package name. Another thing is I can modify relevant python files of pip modules to further debug with above log. To edit .whl file, you can use wheel command to unpack and pack.

Respondent: user3782287

Solution #9:

If you facing this issue at the workplace. This might be the solution for you.

pip install -U <package_name> --user --proxy=<your proxy>
Respondent: Fruit

Solution #10:

I got this error while installing awscli on Windows 10 in anaconda (python 3.7).
While troubleshooting, I went to the answer and then to Finally found that I need to install the libraries PyOpenSSL, cryptography, enum34, idna and ipaddress. After installing these (using simply pip install command), I was able to install awscli.

Respondent: pk786

Solution #11:

Just follow the requirements listed on the project’s page:

Respondent: Ankit Seth

Solution #12:

Same error in slightly different circumstances, on MacOs. Apparently setuptools versions past 45 can expose some issues and this command got me past it:
pip3 install setuptools==45

Respondent: Ray Kim

Solution #13:

Use Command Prompt, and then select Run as administrator.

Upgrade the pip version

To upgrade PIP, type this command, and then press Enter:-

python.exe -m pip install –upgrade pip

Go Back to python path C:UsersJackAppDataLocalProgramsPythonPython37Scripts

Type jupyter notebook

You will be redirected to http://localhost:8888/undefined/tree – Jupyter Home Page

Hope it helps !!!!!!!!!!!

Respondent: charles ross

Solution #14:

might help

sudo pip install wheel==0.29.0

Respondent: arup.dutta22

The answers/resolutions are collected from stackoverflow, are licensed under cc by-sa 2.5 , cc by-sa 3.0 and cc by-sa 4.0 .

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