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Python Introducing Pipenv

Posted by givens
givens
7,484 Points

An error occurred while installing requests!

I used pipenv to install requests as per the Introducing Pipenv course. The terminal returned an error. Does anyone know what is going on here? Thanks!

$ pipenv install requests
Installing requests…
Cannot fetch index base URL https://pypi.org/simple/
Could not find any downloads that satisfy the requirement requests in /Applications/Canopy.app/appdata/canopy-1.4.1.1975.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages
Downloading/unpacking requests
Cleaning up...
No distributions at all found for requests in /Applications/Canopy.app/appdata/canopy-1.4.1.1975.macosx-x86_64/Canopy.app/Contents/lib/python2.7/site-packages
Storing debug log for failure in /Users/brendhanpgivens/.pip/pip.log

Error:  An error occurred while installing requests!

$ pipenv install matplotlib=2.2.2
Installing matplotlib=2.2.2…
⠋WARNING: Invalid requirement, parse error at "'=2.2.2'"
[brendhanpgivens@Stilton oo]$ pipenv install matplotlib==2.2.2
Installing matplotlib==2.2.2…
Downloading/unpacking matplotlib==2.2.2
  Cannot fetch index base URL https://pypi.org/simple/
  Could not find any downloads that satisfy the requirement matplotlib==2.2.2
Cleaning up...
No distributions at all found for matplotlib==2.2.2
Storing debug log for failure in /Users/brendhanpgivens/.pip/pip.log

Error:  An error occurred while installing matplotlib==2.2.2!

$ pipenv install ipython
Installing ipython…
Cannot fetch index base URL https://pypi.org/simple/
Could not find any downloads that satisfy the requirement ipython in /Users/brendhanpgivens/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages
Downloading/unpacking ipython
Cleaning up...
No distributions at all found for ipython in /Users/brendhanpgivens/Library/Enthought/Canopy_64bit/User/lib/python2.7/site-packages
Storing debug log for failure in /Users/brendhanpgivens/.pip/pip.log

Error:  An error occurred while installing ipython!

Courtesy Notice: Pipenv found itself running within a virtual environment, so it will automatically use that environment, instead of creating its own for any project. You can set PIPENV_IGNORE_VIRTUALENVS=1 to force pipenv to ignore that environment and create its own instead. You can set PIPENV_VERBOSITY=-1 to suppress this warning.

1 Answer

Jeff Muday
MOD
Jeff Muday
Treehouse Moderator 28,716 Points
Jeff Muday
Jeff Muday
Treehouse Moderator 28,716 Points

I haven't seen a problem like this, so I am just going to give you a few possibilities to try. You are probably not a beginner if you are interested in learning pipenv, that being said...

Try to hit the URL with a browser:

https://pypi.org/simple/

If your computer cannot resolve it correctly, you might have a networking issue. If it cannot neither pipenv nor traditional pip will be able to pull packages from Pypi. It can also be a proxy issue not allowing you to access that URL on your network.

It is possible that pip, virtualenv, or pipenv are not installed properly for the current user. Only a privileged user (like root) can install these programs at a system level since it modifies /usr/local/bin and /usr/local/lib; you might want to investigate if these are installed properly.

On Ubuntu Linux-- if one omits the "sudo" (super-user-do) you will get a bunch of errors with permissions. pipenv installation requires virtualenv, so you can accomplish the installation like this:

$ sudo apt install pip
$ sudo pip install pipenv

After that, you can create a directory and set up a clean virtualenv

$ mkdir test1
$ cd test1
$ pipenv clean
$ pipenv shell
Launching subshell in a virtual environment...
activate
(test1) $ python

Can you run a "pipenv shell" without an error? The shell needs to find the Pipfile and Pipfile.lock. When you see the (test1) before the $ prompt, you know that it is working properly.

You can also try to create a virtualenv manually

Since "pipenv" is a convenience utility, you should try to go "old-school" with just virtualenv and pip to install requests. I actually prefer using plain virtualenv as you have a totally separate environment and it is very clear where the python repl resides as well as the site packages etc.

see below:

$ mkdir test
$ cd test
$ virtualenv env
$ source env/bin/activate
(env) $ pip install requests

If you don't have any errors with the old-school approach, then it is an installation issue with pipenv.

I hope this helps.