└─$ python3 -m venv venv
Error: name 'cmd' is not defined
┌──()-[~/Documents/Software Development/DjangoAuth/simplejwt]
└─$ source venv/bin/activate
source: no such file or directory: venv/bin/activate
It used to work fine on my other laptop while I just freshly installed new OS here, it throwing an odd error.
This bug report (found by search) suggests you don't have python-venv package installed. Install it:
sudo apt-get install -y python3-venv
The error message is due to a conflict in the versions of Python installed on my system. The package python3.10-venv depends on version 3.10.8-3 of Python, but version 3.10.9-1 is to be installed.
To resolve this issue, I tried the following:
Check the version of Python I have installed by running the command python3 --version.
If I have a version of Python other than 3.10.8-3, I tried uninstalling it and installing version 3.10.8-3 instead.
Once I have installed the correct version of Python, I install the python3-venv package again using the sudo apt-get install -y python3-venv command and it worked.
Thanks all who helped!
I see form my project document that I need to install python-pybind11 by using
sudo apt -y install python-pybind11
but I got error like this:
Reading package lists... Done
Building dependency tree
Reading state information... Done
E: Unable to locate package python-pybind11
I'm not sure if python-pybind11 is a valid package, where can I check it?
Use this to install pybind11:
pip install pybind11
Refer from Here.
In Ubuntu 18.04
apt-get install python-pybind11
On Mac,
brew install pybind11
In Ubuntu 16.04, you'll need to install yourself. One way is as follows:
# Some prerequisites (but not all of them)
apt-get install cmake
pip3 install pytest
# Clone, build and install
git clone https://github.com/pybind/pybind11.git
cd pybind11
mkdir build
cd build
cmake ..
make install
Reference
In some systems, you may need
sudo apt -y install python3-pybind11
I am running virtualenvwrapper and friends on Ubuntu 12.04 (virtualenvwrapper 1.7.1.2, virtualenv 1.7.1.2, pip 1.0, Distribute 0.6.24, Python 2.7). To be able to pip install matplotlib I need a newer version of Distribute/setuptools, so I do the following:
$ mkvirtualenv new_venv
$ pip install matplotlib # fails
$ easy_install -U distribute
# installs Distribute 0.7.3 in the venv,
# which then installs setuptools 1.3.1
$ pip install matplotlib # works
However, when I run pip freeze I get:
argparse==1.2.1
distribute==0.7.3 # here's Distribute
matplotlib==1.3.1
nose==1.3.0
numpy==1.8.0
pyparsing==2.0.1
python-dateutil==2.2
six==1.4.1
tornado==3.1.1
wsgiref==0.1.2
Where is setuptools? I've tried just pip install setuptools and it also fails to show up there.
pip won't list packages that pip itself depends on unless you tell it to. You may include such packages by doing:
pip freeze --all
freeze lists packages in a requirements-format - for use in requirements files etc - while list is just that, a list.
See Pip freeze vs. pip list for more details.
On Ubuntu setuptools is installed by the systems package manager. So it is not listed when you pip freeze. While creating a virtualenv, you will get these messages
mkvirtualenv test
New python executable in test/bin/python
Installing setuptools, pip...done.
If you do a pip freeze immediately after this, you will get something like this
argparse==1.2.1
wsgiref==0.1.2
Here setuptools and pip wont be listed.
If you want everything you can do a pip list which gives something like this.
argparse (1.2.1)
pip (1.5.6)
setuptools (3.6)
wsgiref (0.1.2)
I am trying to install scipy 0.10.1 on Ubuntu 10.10 using pip.
I have successfully installed numpy:
$ sudo pip install --upgrade numpy
[snip]
Successfully installed numpy
Cleaning up...
but when I try scipy I get:
$ sudo pip install --upgrade scipy
[snip]
File "/usr/local/lib/python2.6/dist-packages/numpy/linalg/linalg.py", line 23, in <module>
from numpy.linalg import lapack_lite
ImportError: libifport.so.5: cannot open shared object file: No such file or directory
I do have libifport.so.5, but I don't know why the installer isn't finding it.
$ echo $LD_LIBRARY_PATH
:/opt/intel/composerxe-2011.2.137/compiler/lib/intel64
I have also tried to install several other packages in the hope that one of them might help (e.g. libatlas-base-dev liblapack-dev libatlas-base-dev liblapack-dev, etc)
Any thoughts?
Thank you.
Most likely you have not defined the LD_LIBRARY_PATH for root. To check this:
$ sudo su
$echo $LD_LIBRARY_PATH
You can specify environment variables as follows:
$ sudo env LD_LIBRARY_PATH=path/to/compiler' pip install scipy
Check out this blog post to create an alias to save you typing each time:
http://final-world-domination.blogspot.ch/2011/02/sudo-doesnt-export-ldlibrarypath.html
This fixed the problem for me on Debian 9:
conda install -c intel -c conda-forge -c pytorch --override-channels intel-fortran-rt
# find / -iname "libifport*"
./opt/conda/lib/libifport.so
./opt/conda/lib/libifport.so.5
./opt/conda/pkgs/intel-fortran-rt-2021.3.0-intel_3350/lib/libifport.so
./opt/conda/pkgs/intel-fortran-rt-2021.3.0-intel_3350/lib/libifport.so.5
Is it possible to install psycopg2 into a virtualenv when PostgreSQL isn't installed on my development system—MacBook Pro with OS X 10.6?
When I run pip install psycopg2 from within my virtualenv, I received the error shown below.
I'm trying to connect to a legacy database on a server using Django, and I'd prefer not to install PostgreSQL on my development system if possible.
Why not install PostgreSQL?
I received an error when installing PostgreSQL using homebrew. I have Xcode4—and only Xcode4—installed on my MacBook Pro and am thinking it's related to missing gcc 4.0. However, this is a problem for another StackOverflow question.
Update 8:37 AM on April 12, 2011: I'd still like to know if this is possible without installing PostgreSQL on my MacBook Pro. However, I ran brew update and forced a reinstallation of ossp-uuid with brew install --force ossp-uuid and now brew install postgresql works. With PostgreSQL successfully installed, I was able to pip install psycopg2 from within my virtualenv.
Error from pip install psycopg2
$ pip install psycopg2
Downloading/unpacking psycopg2
Running setup.py egg_info for package psycopg2
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'.
Complete output from command python setup.py egg_info:
running 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
warning: manifest_maker: standard file '-c' not found
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'.
----------------------------------------
Command python setup.py egg_info failed with error code 1
Storing complete log in /Users/matthew/.pip/pip.log
Preliminary Research
Below are the articles I read as preliminary research:
Installing psycopg2 to use Django with PostgreSQL on OS X
Installing psycopg2 on OS X
Using psycopg2 with virtualenv on Ubuntu JauntyLucid
Postgres, psycopg2, virtualenv install hints
apt-get install libpq-dev
helped me on debian squeeze
From comments:
apt-get install python-dev-is-python3
psycopg depends on pg_config command, and if you don't have it, you can't install psycopg.
If system installation is a problem to you, why don't you try compiling PostgreSQL and including generated bin files in your $PATH? Like:
export PATH=/path/to/compiled/postgresql/bin:"$PATH"
pip install psycopg2
brew install postgresql
export LDFLAGS="-L/usr/local/opt/openssl/lib"
export CPPFLAGS="-I/usr/local/opt/openssl/include"
pip3 install psycopg2
apt-get install libpq-dev
helped me in debian squeeze too . After that do pip install psycopg2. I faced problem of pg_config not found problem when i was setting up my environment on heroku , now its working fine .
You need to install the python-dev package in order to make use of python extensions such as psycopg2. I don't know how to install packages in mac but I run the following commands to install a python package on my Ubuntu machine.
sudo apt-get install python-dev
Or
sudo apt-get install python3-dev
if you are using Python3.x.
Once the installation is finished run the following command within your virtual environment.
pip install psycopg2
You don't need the complete PostgreSQL installed: you only need the client side libraries.
I solved it in MAC OSX using :
$ wget https://ftp.postgresql.org/pub/source/v9.5.3/postgresql-9.5.3.tar.bz2
$ tar xfv postgresql-9.5.3.tar.bz2
$ cd postgresql-9.5.3
$ ./configure
$ make
$ cd src/bin/pg_config
$ export PATH=`pwd`:"$PATH"
$ pip install psycopg2
Use pip install psycopg2-binary, it worked for me when pip install psycopg2 wasn't working.
Using the method you described in your April 12th update, I was able to install PostgreSQL(+1). Note that I originally was running Python 2.7.1 (32bit) and homebrew threw several errors and warnings regarding using a 32bit version of Python. I have since switched the 64/32 bit version of 2.7.1 and it works like a champ.
Regarding the pyscopg2, I was able to install it into my virtual environment from source by editing setup.cfg. I set pg_config to correct path inside homebrew's Cellar (pg_config=/usr/local/Cellar/postgresql/9.0.4/bin/pg_config). After saving the changes, I ran python setup.py install with zero issues. It's worth noting that I did not set the Mac's default python setting to 32 bit. I used the new 64 bit from start to finish.
After looking over some of the documentation, I think if I added homebrew's postgresql path to the system path I could have used pip to install it.
Reference:
http://favosdream.blogspot.com/2009/09/make-psycopg2-and-readline-work-in-snow.html
Update 6-8-2011:
While porting a project written on OS X to Windows 7, I found out that I had to install PostgreSQL on Windows as well. This ended up creating another user on my start up screen and other things that I just didn't like. While doing some digging I found Windows drivers for PostgreSQL here. I have since uninstalled the full PostgreSQL and installed the ODBC drivers which, thus far, work great.
To address the original question, after doing a bit more digging I think I found the equivalent ODBC for OS X here. I have not had a chance to try them out, but the concept works very well on Windows 7. I will update this when I get a chance to try them out. Until then, I hope this helps.
All from the above doesn't work for me (OS Catalina 10.15.1)
There was a conflict with classical postgres and homebrew version.
Please delete homebrew version by command
$ brew uninstall postgresql
and then install it from the official website:
$ sudo mkdir -p /etc/paths.d && echo /Applications/Postgres.app/Contents/Versions/latest/bin | sudo tee /etc/paths.d/postgresapp
It is actual for a simple psycopg2 install or django-heroku package.
if you have recently updated python or changed default python (let's say from 3.6 to 3.8). The following code
sudo apt-get install python-dev OR sudo apt-get install python3-dev
will be installing/working for the previous python version.
so if you want this command to work for the recently updated/changed python version try mentioning that specific version like python3.8 in command like
sudo apt-get install python3.8-dev
try above with following
pip install wheel
export PATH=/path/to/compiled/postgresql/bin:"$PATH"
sudo apt-get install libpq-dev
sudo apt-get install python3.x-dev **Change x with your version, eg python3.8**
pip install psycopg2-binary
pip install psycopg2
As I never needed to install postgresql database on this server I installed the following libraries on Ubuntu 14_04 version before running pip install psycopg2 on the same server
apt-get install libpq-dev python-dev
and then executed pip install psycopg2 within virtual env.
Output
Collecting psycopg2
Using cached psycopg2-2.6.1.tar.gz
Building wheels for collected packages: psycopg2
Running setup.py bdist_wheel for psycopg2
Stored in directory: /root/.cache/pip/wheels/e2/9a/5e/7b620848bbc7cfb9084aafea077be11618c2b5067bd532f329
Successfully built psycopg2
Installing collected packages: psycopg2
Successfully installed psycopg2-2.6.1
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.
Try to specify the version and it'll works, do it inside the venv
pip install psycopg2-binary==2.8.6
based on my experience, apt install libpq-dev then try to install psycopg2 inside venv will fix many issues, however for more information you can refer to this link:
https://www.psycopg.org/docs/install.html