I'm attempting to make a website with a few others for the first time, and have run into a weird error when trying to use Django/Python/VirtualEnv. I've found solutions to this problem for other operating systems, such as Ubuntu, but can't find any good solutions for Mac.
This is the relevant code being run:
virtualenv -p python3 venv
source venv/bin/activate
pip install -r requirements.txt
After running that block, I get the following errors:
AssertionError
Failed building wheel for django-toolbelt
Running setup.py bdist_wheel for psycopg2
...
AssertionError
Failed building wheel for psycopg2
Failed to build django-toolbelt psycopg2
I believe I've installed the "django-toolbelt" and "psycopg2", so I'm not sure why it would be failing.
The only difference I can think of is that I did not use the command
sudo apt-get install libpq-dev
as was instructed for Ubuntu usage as I believe that installing postgresql with brew took care of the header.
Thanks for any help or insight!
For MacOS users
After trying all the above methods (which did not work for me on MacOS 10.14), that one worked :
Install openssl with brew install openssl if you don't have it already.
add openssl path to LIBRARY_PATH :
export LIBRARY_PATH=$LIBRARY_PATH:/usr/local/opt/openssl/lib/
install psycopg2 with pip pip3 install psycopg2
I had the same problem on Arch linux. I think that it's not an OS dependant problem. Anyway, I fixed this by finding the outdated packages and updating then.
pip uninstall psycopg2
pip list --outdated
pip install --upgrade wheel
pip install --upgrade setuptools
pip install psycopg2
I was also getting same error.
Using Python 3.7.3 and pip 19.1.1.
I used following command.
pip install psycopg2-binary==2.8.3
TDLR
If you aren't used to installing Python C-extensions, and psycopg2 isn't a core part of your work, try
pip install psycopg2-binary
Building Locally
psycopg2 is a C-extension, so it requires compilation when being installed by pip. The Build Prerequisites section of the docs explain what must be done to make installation via pip possible. In summary (for psycopg 2.8.5):
a C compiler must be installed on the machine
the Python header files must be installed
the libpq header files must be installed
the pg_config program must be installed (it usually comes with the libpq headers) and on $PATH.
With these prerequisites satisfied, pip install psycopg2 ought to succeed.
Installing pre-compiled wheels
Alternatively, pip can install pre-compiled binaries so that compilation (and the associated setup) is not required. They can be installed like this:
pip install psycopg2-binary
The docs note that
The psycopg2-binary package is meant for beginners to start playing with Python and PostgreSQL without the need to meet the build requirements.
but I would suggest that psycopg2-binary is often good enough for local development work if you are not using psycopg2 directly, but just as a dependency.
Concluding advice
Read the informative installation documentation, not only to overcome installation issues but also to understand the impact of using the pre-compiled binaries in some scenarios.
I had same problem and this appears to be a Mojave Issue, I was able to resolve with:
sudo installer -pkg /Library/Developer/CommandLineTools/Packages/macOS_SDK_headers_for_macOS_10.14.pkg -target /
For Mac OS X users:
1. First check your postgresql path by running this command in terminal:
pg_config
If this fails lookup how to add pg_config to your path.
2. Next install Xcode Tools by running this command in terminal:
xcode-select --install
If you have both those sorted out now try to install psycopg2 again
For MacOS users, this question has the correct solution:
install command line tools if necessary:
xcode-select --install
then
env LDFLAGS="-I/usr/local/opt/openssl/include -L/usr/local/opt/openssl/lib" pip install psycopg2
I was also facing the same after running all the above commands, but the following two commands worked for me:
Instead of pip, use this:
sudo apt-get install libpq-dev
then run this command:
pip install psycopg2
On OS X, I was able to solve this by simply upgrading wheel before installing psycopg2:
pip install --upgrade wheel
For OSX Sierra users, it seems that an xcode update is the solution: Can't install psycopg2 package through pip install... Is this because of Sierra?
I tried all the above solutions but they did not work for me. What I did was change the psycopg2 version in my requirements.txt file from psycopg2==2.7.4 to psycopg2==2.7.6
Is your error message complete? the most encountered reason for failing to install psycopg2 on mac from pip is pg_config is not in path.
by the way, using macports or fink to install psycopg2 is more recommended way, so you don't have to worry about pg_config, libpq-dev and python-dev.
plus, are using Python 3.5? then upgrage your wheel to > 0.25.0 using pip.
I faced the same issue, but the answers above didn't work for me.
So this is what I did in my requirements.txt
psycopg2-binary==2.7.6.1 and it worked fine
I had this issue on several packages, including psycopg2, numpy, and pandas. I simply removed the version from the requirements.txt file, and it worked.
So instead of psycopg2-binary==2.7.6.1 I just had psycopg2-binary.
I know you are asking for development environment but if you are deploying on server say, Heroku. Just add below line in the requirements.txt of your project.
django-heroku==0.3.1
As this package itself will install the required packages like psycopg2 on server deployment.So let the server(heroku) should take care of it.
sudo apt install libpq-dev python3.X-dev
where X is the sub version,
these should be followed by :
pip install --upgrade wheel
pip install --upgrade setuptools
pip install psycopg2
Enjoy !!!
I solved my problem by updating/installing vs_BuildTools. The link to the software was given in the error itself.
Error Image
Fixed by installing python3.7-dev: sudo apt install python3.7-dev, based on the link.
Python: 3.7
Ubuntu: 20.04.3 LTS
I am using a old ubuntu so apt install python3.8 will not work. system default python is 3.5.
Then I build python3.8 successfully and run sudo make install. but when I try pip3 install package-name, it still point to python3.5.
I know use python3.8 -m pip install package-name works but I would like to change pip3 to point to new python version directly.
Is it's possible, please help direct me how to do it!
I am trying to install mayavi via pip on my ubuntu 16.04 via shell. I am using python 3.6 via anaconda and already installed vtk and all other requirements but i get the above error when i try pip3 install mayavi or pip2 install mayavi.
Mayavi is packaged for ubuntu packages.ubuntu.com/xenial/mayavi2.
I suggest that you install with the command
sudo apt-get install mayavi2
instead, this will take care of installing a version that matches the vtk install on your system.
Try to rename libvtkOpenGLKitPython*.so file.
In my case it was:
cd /opt/conda/envs/pytorch-py3.6/lib/python3.6/site-packages/vtk
cp libvtkOpenGLKitPython36D-8.1.so libvtkOpenGLKitPython.so
and, maybe one more error with libxt6 file. Fix it:
apt install libxt6
I am running python 3.6 on windows and am attempting to install Shapely using
pip install shapely==1.6b2
It is giving me the following errors
Command "python setup.py egg_info" failed with error code 1 in C:\Users\Cameron\AppData\Local\Temp\pip-build-242ae_ih\shapely\
I have seen the other posts about this issue and have tried:
pip install --upgrade setuptools
pip install ez_setup
easy_install -U setuptools
Nothing seems to work and I am not sure what to do next. Any advice would be appreciated.
Thanks
You may try to use the binary from this unofficial site. Just use pip install {wheel file name} to install it.
Shapely‑1.5.17‑cp36‑cp36m‑win32.whl (32-bit)
Shapely‑1.5.17‑cp36‑cp36m‑win_amd64.whl (64-bit)
Hope this would make the installation easier.
I had a similar error for installing shapely-1.5.17 via pip install shapely, and installing this made the pip install command work thereafter:
sudo apt-get install libgeos-dev
As of 2020, you can now simply install Shapely for Windows with:
pip install shapely
(you many need --upgrade to get at least version 1.7.0, when binary wheels were added for Windows)
I tried so many times to install pythonwifi library for python 2.7, with :
sudo pip install pythonwifi
and
sudo easy_install pythonwifi
But i received a error msg
You have done a small mistake here about the package name.
try:
sudo pip install python-wifi
it should work.