You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application
PythonDjangoPostgresqlPython Problem Overview
I am working on Django project with virtualenv and connect it to local postgres database. when i run the project is says,
ImportError: No module named psycopg2.extensions
then i used this command to install
pip install psycopg2
then during the installation it gives following error.
Downloading/unpacking psycopg2==2.4.4
Downloading psycopg2-2.4.4.tar.gz (648kB): 648kB downloaded
Running setup.py (path:/home/muhammadtaqi/Projects/MyProjects/OnlineElectionCampaign/venv/build/psycopg2/setup.py) egg_info for package psycopg2
Error: You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.
Complete output from command python setup.py egg_info:
running egg_info
creating pip-egg-info/psycopg2.egg-info
writing pip-egg-info/psycopg2.egg-info/PKG-INFO
writing top-level names to pip-egg-info/psycopg2.egg-info/top_level.txt
writing dependency_links to pip-egg-info/psycopg2.egg-info/dependency_links.txt
writing manifest file 'pip-egg-info/psycopg2.egg-info/SOURCES.txt'
warning: manifest_maker: standard file '-c' not found
Error: You need to install postgresql-server-dev-X.Y for building a server-side extension or libpq-dev for building a client-side application.
----------------------------------------
Cleaning up...
Command python setup.py egg_info failed with error code 1 in /home/muhammadtaqi/Projects/MyProjects/OnlineElectionCampaign/venv/build/psycopg2
Storing debug log for failure in /home/muhammadtaqi/.pip/pip.log
Python Solutions
Solution 1 - Python
Use these following commands, this will solve the error:
sudo apt-get install postgresql
then fire:
sudo apt-get install python-psycopg2
and last:
sudo apt-get install libpq-dev
Solution 2 - Python
I just run this command as a root from terminal and problem is solved,
sudo apt-get install -y postgis postgresql-9.3-postgis-2.1
pip install psycopg2
or
sudo apt-get install libpq-dev python-dev
pip install psycopg2
Solution 3 - Python
Just install libpq-dev
$ sudo apt-get install libpq-dev
Solution 4 - Python
For me this simple command solved the problem:
sudo apt-get install postgresql postgresql-contrib libpq-dev python-dev
Then I can do:
pip install psycopg2
Solution 5 - Python
For Python 3, I did:
sudo apt install python3-dev postgresql postgresql-contrib python3-psycopg2 libpq-dev
and then I was able to do:
pip3 install psycopg2
Solution 6 - Python
They changed the packaging for psycopg2. Installing the binary version fixed this issue for me. The above answers still hold up if you want to compile the binary yourself.
See http://initd.org/psycopg/docs/news.html#what-s-new-in-psycopg-2-8.
> Binary packages no longer installed by default. The ‘psycopg2-binary’ package must be used explicitly.
And http://initd.org/psycopg/docs/install.html#binary-install-from-pypi
So if you don't need to compile your own binary, use:
pip install psycopg2-binary
Solution 7 - Python
You must setup postgresql-server-dev-X.Y, where X.Y. your's servers version, and it will install libpq-dev and other servers variables at modules for server side developing. In my case it was
apt-get install postgresql-server-dev-9.5
> Reading package lists... Done
> Building dependency tree Reading state information... Done The
> following packages were automatically installed and are no longer
> required: libmysqlclient18 mysql-common Use 'apt-get autoremove' to
> remove them. The following extra packages will be installed:
> libpq-dev Suggested packages: postgresql-doc-10 The following NEW
> packages will be installed: libpq-dev postgresql-server-dev-9.5
In your's case
sudo apt-get install postgresql-server-dev-X.Y
sudo apt-get install python-psycopg2
Solution 8 - Python
I was using a virtual environment on Ubuntu 18.04, and since I only wanted to install it as a client, I only had to do:
sudo apt install libpq-dev
pip install psycopg2
And installed without problems. Of course, you can use the binary as other answers said, but I preferred this solution since it was stated in a requirements.txt file.
Solution 9 - Python
Run the command below;
sudo apt-get install python-pip python-dev libpq-dev postgresql postgresql-contrib
pip install psycopg2
Solution 10 - Python
In my case, I was facing this problem when I ran pip install -r requirements.txt to install all packages for a Django project with PostgreSQL database on an Ubuntu machine, I ran into this error and many other installation errors.
To solve this one, I ran the following commands:
sudo apt install postgresql postgresql-contrib
sudo apt install libpq-dev
sudo apt install python3-dev
sudo apt install python3-pip
sudo apt install python3-psycopg2
pip3 install psycopg2
pip3 install psycopg2-binary
Plus, also check if the Ubuntu and Python and Psycopg versions are compatible together.
Also, pip install aiopg, solve the issue when i ran into it the second time.