ImportError: No module named psycopg2

Question

In installation process of OpenERP 6, I want to generate a config file with these commands:

cd /home/openerp/openerp-server/bin/

./openerp-server.py -s --stop-after-init -c /home/openerp/openerp-server.cfg

But it always showed the message: ImportError: No module named psycopg2

When I checked for psycopg2 package, it's already installed. Package python-psycopg2-2.4.5-1.rhel5.x86_64 is already installed to its latest version. Nothing to do. What's wrong with this? My server is CentOS, I've installed Python 2.6.7.

You need to accept some answers on some of your other questions. — John Lyon, Oct 16 '12 at 01:36
The package installs for python2.4. If you have manually installed 2.6 then you also have to install all the other packages for 2.6. — Keith, Oct 16 '12 at 02:49
Please execute the following command to confirm the python system path. `$ python -c 'import sys; print sys.path'` — Taizo Ito, Oct 16 '12 at 04:15
Will you please try to `import psycopg2` on the python console? — Nilesh, Oct 17 '12 at 06:01

score 187 · Answer 1 · edited May 30 '21 at 17:38

187

Step 1: Install the dependencies

sudo apt-get install build-dep python-psycopg2

Step 2: Run this command in your virtualenv

pip install psycopg2-binary

Ref: Fernando Munoz

edited May 30 '21 at 17:38

Nam G VU

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answered Apr 16 '14 at 09:04

Tarique

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This saved me! http://stackoverflow.com/questions/25169939/python-manage-py-syncdb-fails-with-improperlyconfigured-no-module-named-psyco – aliteralmind Aug 06 '14 at 21:07
1

I had to run `easy_install psycopg2`, but your question led me there! – JcKelley Nov 03 '14 at 02:56
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I found I also had to ```sudo apt-get install libpq-dev```, as I don't have Postgresql installed on the machine I'm trying to install ```psycopg2``` on. – Adam Parkin Oct 07 '15 at 20:17
On arch linux its the same package-name: `pacman -S python-psycopg2` – Stephan Schielke Jun 30 '16 at 20:54
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For Python3 users: install `libpq-dev postgresql` – alekwisnia Nov 28 '16 at 14:22
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On Kubuntu 16.04 `build-dep` option doesn't work but `sudo apt-get install python-psycopg2` works – Mugoma J. Okomba Feb 16 '17 at 06:36
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in ubuntu 16.04 it shows E: Unable to locate package build-dep – Harun-Ur-Rashid Sep 25 '17 at 10:03
You can't use install and build-dep in the same command. They're both commands for apt-get. Should be `sudo apt-get build-dep python-psycopg2` – Bennett Garner Nov 08 '18 at 16:00
Thank you all. Issued fixed. @FernanadoMunoz, how did you determine to run "Step 2: Run this command in your virtualenv ```pip install psycopg2-binary``` " ? Your Step 2 solved my problem. I will appreciate your advice. – Ben Q Feb 20 '23 at 23:30

score 98 · Answer 2 · answered Feb 26 '19 at 11:54

98

Use psycopg2-binary instead of psycopg2.

pip install psycopg2-binary

Or you will get the warning below:

UserWarning: 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.

Reference: Psycopg 2.7.4 released | Psycopg

answered Feb 26 '19 at 11:54

Yan QiDong

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Just FYI - "If you are the maintainer of a published package depending on psycopg2 you shouldn’t use psycopg2-binary as a module dependency" see: https://www.psycopg.org/docs/install.html#psycopg-vs-psycopg-binary – Chad May 11 '21 at 16:25

score 61 · Answer 3 · edited Jul 03 '19 at 14:31

61

I faced the same issue and resolved it with following commands:

sudo apt-get install libpq-dev
pip install psycopg2

edited Jul 03 '19 at 14:31

Bhavesh Odedra

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answered Apr 17 '19 at 16:33

Safvan CK

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This fixed the error message `You need to install postgresql-server-dev-X.Y ...` that I got after running `sudo apt-get install build-dep python-psycopg2` (even thought I have postgresql installed already). – webelo Sep 13 '19 at 18:51

score 24 · Answer 4 · edited Jan 27 '20 at 12:46

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Try installing

psycopg2-binary

with pip install psycopg2-binary --user

edited Jan 27 '20 at 12:46

kometen

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answered Sep 30 '19 at 14:39

Y. Yazarel

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This is the only answer that worked for me with `python 3.7.3` and `django 3.0.2` – Brian Mar 02 '20 at 05:13
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what is --user for? – Muhammad Inaam Munir Mar 27 '20 at 21:05
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@MuhammadInaamMunir `--user : Install to the Python user install directory for your platform. Typically ~/.local/, or %APPDATA%\Python on Windows.` You can check more info using `pip install --help`. – ibnɘꟻ Nov 13 '20 at 06:21

riskdoctor · Answer 5 · 2021-06-02T05:27:02.127

Import Error on Mac OS

If psycopg2 is getting installed but you are unable to import it in your .py file then the problem is libpq, its linkages, and the library openssl, on which libpq depends upon. The overall steps are reproduced below. You can check it step by step to know which is the source of error for you and then you can troubleshoot from there.

Check for the installation of the openssl and make sure it's working.
Check for installation of libpq in your system it may not have been installed or not linked. If not installed then install it using the command brew install libpq. This installs libpq library. As per the documentation

libpq is the C application programmer's interface to PostgreSQL. libpq is a set of library functions that allow client programs to pass queries to the PostgreSQL backend server and to receive the results of these queries.

Link libpq using brew link libpq, if this doesn't work then use the command: brew link libpq --force.
Also put in your .zshrc file the following
export PATH="/usr/local/opt/libpq/bin:$PATH". This creates all the necessary linkages for libpq library .
Now restart the terminal or use the following command source ~/.zshrc.
Now use the command pip install psycopg2. It will work. This works, even when you are working in conda environment.

N.B. pip install psycopg2-binaryshould be avoided because as per the developers of the psycopg2 library

The use of the -binary packages in production is discouraged because in the past they proved unreliable in multithread environments. This might have been fixed in more recent versions but I have never managed to reproduce the failure.

This solved my problem! psycopg2 was clearly installed because i could successfully connect to my db, but when I tried to run a streamlit app that needed the results from the connection, i got the import not found statement. This solved it completely. Thank you! — Iris D, Apr 10 '22 at 18:30

score 14 · Answer 6 · answered Oct 17 '12 at 06:09

Please try to run the command import psycopg2 on the python console. If you get the error then check the sys.path where the python look for the install module. If the parent directory of the python-psycopg2-2.4.5-1.rhel5.x86_64 is there in the sys.path or not. If its not in the sys.path then run export PYTHONPATH=<parent directory of python-psycopg2-2.4.5-1.rhel5.x86_64> before running the openerp server.

score 10 · Answer 7 · edited Jul 03 '19 at 14:29

10

Try with these:

virtualenv -p /usr/bin/python3 test_env
source test_env/bin/activate
pip install psycopg2

run python and try to import if you insist on installing it on your systems python try:

pip3 install psycopg2

edited Jul 03 '19 at 14:29

Bhavesh Odedra

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answered Oct 20 '15 at 13:05

Cp Verma

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score 7 · Answer 8 · answered Nov 25 '18 at 15:40

Recently faced this issue on my production server. I had installed pyscopg2 using

sudo pip install psycopg2

It worked beautifully on my local, but had me for a run on my ec2 server.

sudo python -m pip install psycopg2

The above command worked for me there. Posting here just in case it would help someone in future.

score 6 · Answer 9 · answered Nov 05 '20 at 06:25

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sudo pip install psycopg2-binary

answered Nov 05 '20 at 06:25

Surya Bista

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scarver2 · Answer 10 · 2014-04-06T03:13:16.367

You need to install the psycopg2 module.

On CentOS: Make sure Python 2.7+ is installed. If not, follow these instructions: http://toomuchdata.com/2014/02/16/how-to-install-python-on-centos/

# Python 2.7.6:
$ wget http://python.org/ftp/python/2.7.6/Python-2.7.6.tar.xz
$ tar xf Python-2.7.6.tar.xz
$ cd Python-2.7.6
$ ./configure --prefix=/usr/local --enable-unicode=ucs4 --enable-shared LDFLAGS="-Wl,-rpath /usr/local/lib"
$ make && make altinstall
$ yum install postgresql-libs

# First get the setup script for Setuptools:
$ wget https://bitbucket.org/pypa/setuptools/raw/bootstrap/ez_setup.py

# Then install it for Python 2.7 and/or Python 3.3:
$ python2.7 ez_setup.py

$ easy_install-2.7 psycopg2

Even though this is a CentOS question, here are the instructions for Ubuntu:

$ sudo apt-get install python3-pip python-distribute python-dev
$ easy_install psycopg2

Cite: http://initd.org/psycopg/install/

Hmm getting `ez_setup.py is deprecated and when using it setuptools will be pinned to 33.1.1` — Arthur, Nov 08 '17 at 04:54

score 4 · Answer 11 · answered May 04 '20 at 03:23

4

i have the same problem, but this piece of snippet alone solved my problem.

pip install psycopg2

answered May 04 '20 at 03:23

yts61

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score 4 · Answer 12 · edited Jun 11 '22 at 03:30

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Run into the same issue when I switch to Ubuntu from Windows 10.. the following worked for me.. this after googling and trying numerous suggestions for 2 hours...

sudo apt-get install libpq-dev

then

pip3 install psycopg2

I hope this helps someone who has encountered the same problem especially when switching for windows OS to Linux(Ubuntu).

edited Jun 11 '22 at 03:30

Mechanic Pig

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answered Oct 28 '20 at 01:51

Richard Rosario

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score 4 · Answer 13 · answered Nov 30 '20 at 19:28

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For python3 on ubuntu, this worked for me:

$sudo apt-get update
$sudo apt-get install libpq-dev
$sudo pip3 install psycopg2-binary

answered Nov 30 '20 at 19:28

Nicole Douglas

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score 2 · Answer 14 · edited Nov 18 '21 at 15:34

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I have done 2 things to solve this issue:

use Python 3.6 instead of 3.8.
change Django version to 2.2 (may be working with some higher but I change to 2.2)

edited Nov 18 '21 at 15:34

Tomerikoo

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answered Jan 12 '20 at 09:38

KAMRAN

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score 1 · Answer 15 · answered Nov 04 '18 at 02:08

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For Python3

Step 1: Install Dependencies

sudo apt-get install python3 python-dev python3-dev

Step 2: Install

pip install psycopg2

answered Nov 04 '18 at 02:08

Walter Schweitzer

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score 1 · Answer 16 · answered Aug 21 '19 at 06:53

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check correctly if you had ON your virtual env of your peoject, if it's OFF then make it ON. execute following cammands:

workon <your_env_name>
python manage.py runserver

It's working for me

answered Aug 21 '19 at 06:53

Soft Technoes

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score 1 · Answer 17 · answered Aug 17 '22 at 15:47

Python2 importerror no module named psycopg2

pip install psycopg2-binary

Requirement already satisfied...

Solved by following steps:

sudo curl https://bootstrap.pypa.io/pip/2.7/get-pip.py -o get-pip.py
sudo python get-pip.py
sudo python -m pip install psycopg2-binary

Devender Goyal · Answer 18 · 2023-02-13T02:59:32.210

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It's very simple, not sure why nobody mentioned this for mac before.

brew install postgresql

pip3 install psycopg2

In simple terms, psycopg2 wants us to install postgres first.

PS: Don't forget to upvote, so that it can help other people as well.

edited Feb 13 '23 at 02:59

answered Jan 24 '23 at 16:37

Devender Goyal

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score 1 · Answer 19 · answered Feb 20 '23 at 23:33

1

For Python3 use this:

sudo apt-get install -y python3-psycopg2

answered Feb 20 '23 at 23:33

Sugumar

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This one should be the correct answer i think, work for me on ubuntu 22 – dmh Jun 21 '23 at 04:29

score 0 · Answer 20 · answered Jul 20 '21 at 17:39

Solved the issue with below solution :

Basically the issue due to _bz2.cpython-36m-x86_64-linux-gnu.so Linux package file. Try to find the the location.
Check the install python location ( which python3)- Example: /usr/local/bin/python3
copy the file under INSTALL_LOCATION/lib/python3.6

cp -rvp /usr/lib64/python3.6/lib-dynload/_bz2.cpython-36m-x86_64-linux-gnu.so /usr/local/lib/python3.6

score 0 · Answer 21 · answered Jul 25 '22 at 13:41

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try:

pip install psycopg2 --force-reinstall --no-cache-dir

answered Jul 25 '22 at 13:41

Sai prateek

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score 0 · Answer 22 · answered Jan 16 '23 at 08:54

0

pip install psycopg-binary

The line above helped me

answered Jan 16 '23 at 08:54

MuhammedTech

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I don't see how this adds anything not mentioned already back in 2013. Also, the question is about psycopg2, not psycopg. – Adriaan Jan 16 '23 at 09:31
As it’s currently written, your answer is unclear. Please [edit] to add additional details that will help others understand how this addresses the question asked. You can find more information on how to write good answers [in the help center](/help/how-to-answer). – Community Jan 17 '23 at 04:32

score 0 · Answer 23 · answered Sep 01 '23 at 12:22

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just follow this link that contain $ pip install psycopg2-binary its solve my problem in mac m1

https://www.psycopg.org/docs/install.html

answered Sep 01 '23 at 12:22

Adel Abou Elezz

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score 0 · Answer 24 · answered Sep 01 '23 at 15:09

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Kindly go into system environment variable and check if have any script or python file install C:\Users\User_Name\AppData\Roaming\Python\Python311\Scripts' if yes then go to system variable and enter this path i hope this can work for you...

answered Sep 01 '23 at 15:09

Mayank Pandey

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ImportError: No module named psycopg2

24 Answers24

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