Could not find a version that satisfies the requir

问题:

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

numpy>=1.8.2,<2.0.0
matplotlib>=1.3.1,<2.0.0
scipy>=0.14.0,<1.0.0
astroML>=0.2,<1.0
scikit-learn>=0.14.1,<1.0.0
rpy2>=2.4.3,<3.0.0

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.

回答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.

回答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>

回答3:

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.

回答4:

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).

Command:

python3 -m pip install --pre --upgrade PACKAGE==VERSION.VERSION.VERSION

回答5:

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:

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

回答6:

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:\Users\Jack\AppData\Local\Programs\Python\Python37\Scripts

Type jupyter notebook

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

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

回答7:

might help

sudo pip install wheel==0.29.0