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Pip cannot install anything on ubuntu server

I had deleted an existing virtual environment. I created a new one and activated it. Now I am trying to install site packages using
pip install -r requirements.txt
But I keep getting the error
Cannot fetch index base URL https://pypi.python.org/simple/
Could not find any downloads that satisfy the requirement BeautifulSoup==3.2.1 (from -r requirements.txt (line 1))
Now I know that the packages are really old but this is running on python 2.7.6. I am also not able to install anything through pip. I have tried
pip install numpy
But it shows the same errors. As per the similar questions answered before the suggestion is to use https://pypi.python.org which I have already done but still facing these errors.
Would love to hear your suggestions.

Might be a problem with having an old version of pip.
Try pip install --upgrade pip and then try installing the requirements again.

pip tries to create lockfile in cache directory
Try running pip install --upgrade pip --no-cache-dir

pip install: trying to install multiple version of same package from private pypi

I've a private pypi, and keep uploading new package framework to that registry.
I want to install the latest package in a virtualenv.
Command used:
pip install -i https://user:pass#registry framework
OUTPUT:
Collecting framework:
... downloads many versions
ERROR: Cannot install framework==0.25.13, framework==0.25.14 and framework==0.26.0 because these package versions have conflicting dependencies.
The conflict is caused by:
framework 0.26.0 depends on toolz<0.12.0 and >=0.11.1
framework 0.25.14 depends on toolz<0.12.0 and >=0.11.1
framework 0.25.13 depends on toolz<0.12.0 and >=0.11.1
To fix this you could try to:
1. loosen the range of package versions you've specified
2. remove package versions to allow pip attempt to solve the dependency conflict
ERROR: ResolutionImpossible: for help visit https://pip.pypa.io/en/latest/user_guide/#fixing-conflicting-dependencies
I want only the latest version to be downloaded. I cannot hard-code version like framework==0.26.0 while pip install because this command is to be used in script and I may need to modify the script everytime a new framework get uploaded.
pip version: pip 21.1.2

The solution that worked for this problem was using --extra-index-url instead of -i
Command to use
pip install --extra-index-url https://user:pass#registry framework

Python packages hash not matching whilst installing using pip

I am using pip to install all my python packages but get error as shown in the trace below. What is the problem and how can I solve it?
usr#comp:~$ pip install flask
Collecting flask
Using cached Flask-0.11.1-py2.py3-none-any.whl
Collecting itsdangerous>=0.21 (from flask)
Using cached itsdangerous-0.24.tar.gz
Collecting click>=2.0 (from flask)
Using cached click-6.6.tar.gz
Collecting Werkzeug>=0.7 (from flask)
Using cached Werkzeug-0.11.11-py2.py3-none-any.whl
Requirement already satisfied (use --upgrade to upgrade): Jinja2>=2.4 in /usr/lib/python2.7/dist-packages (from flask)
Requirement already satisfied (use --upgrade to upgrade): MarkupSafe in /usr/lib/python2.7/dist-packages (from Jinja2>=2.4->flask)
THESE PACKAGES DO NOT MATCH THE HASHES FROM THE REQUIREMENTS FILE. If you have updated the package versions, please update the hashes. Otherwise, examine the package contents carefully; someone may have tampered with them.
Werkzeug>=0.7 from https://pypi.python.org/packages/a9/5e/41f791a3f380ec50f2c4c3ef1399d9ffce6b4fe9a7f305222f014cf4fe83/Werkzeug-0.11.11-py2.py3-none-any.whl#md5=c63a21eedce9504d223ed89358c4bdc9 (from flask):
Expected md5 c63a21eedce9504d223ed89358c4bdc9
Got 13a168aafcc43354b6c79ef44bb0dc71

There is a similar problem (Why does pip fail with bad md5 hash for package?) from 2013 the solution that I tried that worked for me is this:
sudo pip install --no-cache-dir flask
given by attolee

The problem here is the Python package was updated with new hash value while pip was trying to install the Python package using the old hash value cached in pip cache directory. This cache needs to be purge before the pip install attempt. So the full solution is:
python -m pip cache purge
python -m pip install <package>

--no-cache-dir did not work for me in raspberry pi 4 at first.
Found that the problem was due to unexpected network change/failure during pip installation
I had to download the broken .whl file manually with wget
and install it like below:
sudo pip install scipy-1.3.0-cp37-cp37m-linux_armv7l.whl
followed by
sudo pip install --no-cache-dir keras
Then it worked.

Looks like a cache problem, the cached package is different from REQUIREMENTS.
Perhaps caused by last updates interruption.
I did this which fixed my problem:
rm ~/.cache/pip -rf

You need to upgrade your pip into the newer version:
Using this command:
python -m pip install -upgrade pip
for Mac/Linux operating system and use
python -m pip install --upgrade tensorflow
for Windows to update your pip. Then run your command
pip install flask

In case you got this error while using pipenv try
$ pipenv --clear
$ pipenv lock
$ pipenv install

first, try to upgrade your pip then install the library
python -m pip install -upgrade pip
if it didn't work just try to install it without the cash
pip install --no-cache-dir the_library_name

I got the error during installing panads
You need to remove the cache and reinstall .
pip install --no-cache-dir flask

I had a similar issue for a different module. It was caused by network failure. My fix was nothing complex but another attempt at installing it and it worked.

maybe pipiserver(where you pip install from) upload a pkg for example flask-1.0.0.tar.gz, and rm is upload a new flask-1.0.0.tag.gz,if new pkg code has changed ,the hash must be different,there is two ways:
installl an older pkg version =, pip install flask==0.0.9
wait new pkg release flask==1.0.1 or cache expiration.

I have tried to clear pip cache with "-m pip cache purge" and using the "--no-cache-dir" argument but it was not helping.
In my case it was VPN being active during the attempts to install the package. As soon as I have turned it off everything worked as expected.

Can't Install `pip` for `python 3.3` but worked fine for `python 2.7`

I'm new to python but not programming. My goal is to learn Django for web development.
I've been trying to install the later versions of python, pip and Django. I could install pip for python 2.7 just fine but now that I'm trying to install it on python 3, it gives me an error which I think is related to SSL certifications but not sure how to resolve it. My confusion is the fact that it worked fine once but doesn't happen again. I really appreciate the help.
My code is below:
~$> which python3
/Library/Frameworks/Python.framework/Versions/3.3/bin/python3
~$> which pip
/usr/local/bin/pip
~$> pip -V
pip 1.5.6 from /Library/Python/2.7/site-packages (python 2.7)
~$> sudo python3 /Applications/get-pip.py
Downloading/unpacking pip
Cannot fetch index base URL https://pypi.python.org/simple/
Could not find any downloads that satisfy the requirement pip
Cleaning up...
No distributions at all found for pip
Storing debug log for failure in /Users/Gemeni/.pip/pip.log
~$>
I'm still very much stuck. I used a work around and installed pip...
easy_install pip==1.2.1
but the version is not 1.2.1 and I can't install anything else with pip now.
~$> pip install django
Downloading/unpacking django
Cannot fetch index base URL https://pypi.python.org/simple/
Could not find any downloads that satisfy the requirement django
Cleaning up...
No distributions at all found for django
Storing debug log for failure in /Users/Gemeni/.pip/pip.log
~$> pip --version
pip 1.5.6 from /Users/Gemeni/.virtualenvs/yara-project/lib/python3.3/site-packages (python 3.3)
Can someone please help me out to figure this out? I installed python3.4 at first but I saw that Django is not supporting it now. I comes with pip already installed. I read everywhere that it's a SSL issue and can be solved by modifying proxy setting but I'm not sure how it can be done. Any thoughts?

pip is for python2
pip3 is for python3
Try to install the package python3-pip with your distro package manager, then use pip3 to install Django. Come back if you get any other problem
Like:
~#>apt-get install python3-pip
~$>pip3 install django

Why does pip fail with bad md5 hash for package?

I'm trying to install Django package in a virtualenv. I'm on a new computer (OSX 10.8.2). I installed virtualenv via easy_install. With the virtualenv activated, I ran:
(pyenv)$ pip install Django
Downloading/unpacking Django
Downloading Django-1.5.1.tar.gz (8.0MB): 2.0MB downloaded
Hash of the package https://pypi.python.org/packages/source/D/Django/Django-1.5.1.tar.gz#md5=7465f6383264ba167a9a031d6b058bff (from https://pypi.python.org/simple/Django/) (<md5 HASH object # 0x108453df0>) doesn't match the expected hash 7465f6383264ba167a9a031d6b058bff!
Bad md5 hash for package https://pypi.python.org/packages/source/D/Django/Django-1.5.1.tar.gz#md5=7465f6383264ba167a9a031d6b058bff (from https://pypi.python.org/simple/Django/)
This happens even if I delete virtualenv and start over. I've tried again repeatedly over the past few hours, it always happens. Any suggestions?

I have the same problem when I try sudo pip install Pillow, and I try sudo pip install --no-cache-dir Pillow, it works for me.

If it's just this package that you can't get to install, you could download the tarball manually, and then use pip to install it from that file. The Django download site has checksums that you can validate manually as well. I don't use osx, but probably something like this would help:
cd /tmp
wget https://pypi.python.org/packages/source/D/Django/Django-1.5.1.tar.gz
md5sum Django-1.5.1.tar.gz
pip install Django-1.5.1.tar.gz

For me below command works
pip install django --no-cache-dir

I now had this issue several times.
Like others mentioned before me, pip install [module] --no-cache-dir
helps most of the time.
But sometimes, you got some dependencies to install first and it fails installing one of these (md5 validation failed).
Just had this problem myself. In this case, installing this dependency alone like pip install dependency
worked and after that I was able to install the first module.
Also pip install -vvv is nice for more info gathering on general problem solving