Error No module named psycopg2 extensions

Question

I am trying to set up a PostgreSQL database for my django project  which I believe I have done now thanks to the replies to my last question Problems setting up a postgreSQL database for a django project  I am now trying to run the command  python manage py runserver  in Terminal to get my localhost up but when I run the command  I see this response     Error  No module named psycopg2 extensions   I m not sure what this means - I have tried to download psycopg2 but can t seem to find a way to download psycopg2 using homebrew  I have tried easy install  pip install and sudo but all return errors like this     Downloading http   www psycopg org psycopg tarballs PSYCOPG-2-4 psycopg2-2 4 5 tar gz Processing psycopg2-2 4 5 tar gz Writing  tmp easy install-l7Qi62 psycopg2-2 4 5 setup cfg Running psycopg2-2 4 5 setup py -q bdist egg --dist-dir  tmp easy install-l7Qi62 psycopg2-2 4 5 egg-dist-tmp-PBP5Ds no previously-included directories found matching  doc src  build  unable to execute gcc-4 0  No such file or directory error  Setup script exited with error  command  gcc-4 0  failed with exit status 1   How to fix this

User · Answer

On Alpine Linux  majority of the docker containers  do     apk add postgresql-dev   Then   pip install psycopg2-binary

User · Answer

try this  sudo pip install -i https   testpypi python org pypi psycopg2  2 7b2    this is especially helpful if you re running into egg error  on aws ec2 instances if you run into gcc error  try this  1  sudo yum install gcc python-setuptools python-devel postgresql-devel 2  sudo su -  3  sudo pip install psycopg2

User · Answer

The first thing to do is to install the dependencies    sudo apt-get build-dep python-psycopg2   After that go inside your virtualenv and use   pip install psycopg2-binary   These two commands should solve the problem

User · Answer

pip3 install django-psycopg2-extension  I know i am late and there s lot of answers up here which also solves the problem  But today i also faced this problem and none of this helps me  Then i found the above magical command which solves my problem  -P   so i am posting this as it might be case for you too  Happy coding

User · Answer

I installed it successfully using these commands   sudo apt-get install libpq-dev python-dev pip install psycopg2

User · Answer

For Django 2 and python 3 install psycopg2 using pip3    pip3 install psycopg2

User · Answer

first install apt-get install python-setuptools   then try easy install psycopg2

User · Answer

I used the extension after only importing psycopg2   import psycopg2       psycopg2 extensions AsIs anap i

User · Answer

you can install gcc for macos from  https   github com kennethreitz osx-gcc-installer  after instalation of gcc you ll be able to install psycopg with easy install or with pip

User · Answer

In python 3 4  while in a virtual environment  make sure you have the build dependencies first   sudo apt-get build-dep python3-psycopg2   Then install it   pip install psycopg2

User · Answer

pip install psycopg2-binary   The psycopg2 wheel package will be renamed from release 2 8  in order to keep installing from binary please use  pip install psycopg2-binary  instead  For details see  http   initd org psycopg docs install html binary-install-from-pypi

User · Answer

This one worked for me  python manage py migrate

User · Answer

This is what helped me on Ubuntu if your python installed from Ubuntu installer  I did this after unsuccessfully trying  apt-get install  and  pip install    In terminal   sudo synaptic   then in synaptic searchfield write   psycopg2   choose   python-psycopg2   mark it for installation using mouse right-click and push  apply   Of course  if you don t have installed synaptic  then first  do   sudo apt-get install synaptic

User · Answer

This error raise because you not install postgres database in you project virtutal environment  you should run one of these command  from a terminal you can you command for sudo  sudo apt-get install build-dep python-psycopg2  for pip  pip basically work for python  pip install psycopg2  or pip3 install psycopg2-binary  i m pretty sure it will work for you

User · Answer

It seems that you need gcc-4 0  and it would be helpful to specify your OS type and version   Maybe this question will help you a bit  Installing GCC to Mac OS X Leopard without installing Xcode  Update  I m a Windows user  so I can t test your setup  but a quick google pointed to some more links    http   hardlifeofapo com psycopg2-and-postgresql-9-1-on-snow-leopard  Cannot install psycopg2 on OSX 10 6 7 with XCode4

User · Answer

I encountered the No module named psycopg2 extensions error when trying to run pip2 install psycopg2 on a Mac running Mavericks  10 9   I don t think my stack trace included a message about gcc  and it also included a hint   Error  pg config executable not found   Please add the directory containing pg config to the PATH or specify the full executable path with the option       python setup py build ext --pg-config  path to pg config build      or with the pg config option in  setup cfg     I looked for the pg config file in my Postgres install and added the folder containing it to my path   Applications Postgres app Contents Versions 9 4 bin  Your path may be different  especially if you have a different version of Postgres installed - I would just poke around until you find the bin  folder  After doing this  the installation worked

User · Answer

Check if you have installed psycopg2 if not   sudo apt-get install psycopg2   Install the dependencies    sudo apt-get build-dep python-psycopg2   These two commands should solve the problem

User · Answer

For macOS Mojave just run pip install psycopg2-binary  Works fine for me  python version -  Python 3 7 2

User · Answer

I had such problem when trying to run python script as a sudo  while psycopg2 was installed via pip3 to my own user s directory  I managed to resolve the issue for myself removing pip3 version  and just installing it via apt  pip3 uninstall psycopg2 sudo apt install python3-psycopg2

[python] Error: No module named psycopg2.extensions

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