Error installing django-heroku Error: pg_config executable not found - django

I tried installing django-heroku via pip so I can deploy my project on heroku but during installation of django-heroku it tried to install psycopg2 along only to produce an error:
Error:pg_config executable not found.
pg_config is required to build psycopg2 from source.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'.
And I also wish to know if I'm required to pip install it since heroku installs the libaries specified in the requirements.txt file,if not required are there changes I need to make to my project before deployment.

Perhaps not optimal solution but it did work for me.
pip install --no-dependencies django-heroku
Be sure to have other required packages installed.
pip install django
pip install whitenoise
pip install psycopg2-binary
P.S. I have already had postgresql installed on my Mac. Not sure why I was getting the same error.

I renamed "psycopg2" in the python site packages folder to "psycopg2-binary", and this fixed my issue.

Related

psycopg2-binary installation into a virtual environment fails when trying to compile source code

I am trying to install psycopg2-binary into my Django project. I am using a virtual environment and the command I'm running is
pip install psycopg2-binary
However, I'm getting a massive error message, the gist of it is this:
Error: pg_config executable not found.
pg_config is required to build psycopg2 from source. 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'.
If you prefer to avoid building psycopg2 from source, please install the PyPI
'psycopg2-binary' package instead.
But, hey, I'm installing exactly 'psycopg2-binary'
Why am I getting all this mess?
Pip cannot find you processor+OS at https://pypi.org/project/psycopg2-binary/2.9.2/#files so it tried to install from sources (the last file at the page) and failed.
Compiling from sources is currently the only way. If you can donate some spare processor cycles to the Psycopg2 authors they perhaps could start compiling and publishing wheels for OSX on M1.

Can't install psycopg2-binary

I'm trying to install psycopg2-binary (pip3 install psycopg2-binary) inside the virtual environment of my Django project on Centos 7 with preinstalled Postgresql 12 and have the well-known error:
Error: pg_config executable not found.
pg_config is required to build psycopg2 from source. 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'.
If you prefer to avoid building psycopg2 from source, please install the PyPI
'psycopg2-binary' package instead.
I tried to install python3-devel postgresql-libs postgresql-server postgresql-devel postgresql-contrib, but still have this error.
pip3 install psycopg2, pip install psycopg2 - the same problem.
PS The problem was solved via updating pip (pip install --upgrade pip).
you can try it this method, is very useful
sudo apt-get install postgresql postgresql-dev python-dev

Failed building wheel for python-ldap (windows) *first stackoverflow ask*

I've installed flask, flask_login, and ldap in the virtualenv for my flask package (to authenticate ldap users with the usernames & passwords of the other users at my company).
When I run my flask app, I get "AttributeError: 'module' object has no attribute 'initialize'"
I'm tried "pip install python-ldap"
but I get a red error (sandwiched between other white text) that reads:
"Failed building wheel for python-ldap"
I have thoroughly examined these:
How to install python-ldap on a python 2.7 virtualenv on windows without compiling
Installing python-ldap in a virtualenv on Windows
https://www.python-ldap.org/docs.html
https://www.linuxjournal.com/article/6988?page=0,1
to no avail.
I've had this error for days now...
(also:
pip install openldap
gives:
Collecting openldap
Could not find a version that satisfies the requirement openldap (from versions: )
No matching distribution found for openldap
...(in and outside of my venv) if that information helps)
I had this error last week and after switching work computers, I recreated the virtualenv and installed all of the other packages and dependencies successfully.
my requirements.txt file contains these lines after a line of git stuff:
click==6.7
Flask==0.12.2
Flask-Login==0.4.0
itsdangerous==0.24
Jinja2==2.9.6
ldap==1.0.2
ldap3==2.2.4
MarkupSafe==1.0
pyasn1==0.2.3
Werkzeug==0.12.2
Has anyone successfully installed python-ldap into a flask virtualenv with windows? If so... how?!
Go to:
http://www.lfd.uci.edu/~gohlke/pythonlibs/#python-ldap
download python_ldap-2.4.38-cp27-cp27m-win_amd64.whl in the same directory that your venv folder is listed under
(ex.)
/myrepo
/myapp
/myapp
/venv
/run.py
/python_ldap-2.4.38-cp27-cp27m-win_amd64.whl
install the .whl file while inside of your venv
venv\Scripts\activate
pip install python_ldap-2.4.38-cp27-cp27m-win_amd64.whl
Voila!
The error
ERROR: Failed building wheel for python-ldap
can occur for several reasons. You actually have to look at what happened above this line. In my case, I just had to install missing dependencies to build python-ldap. You can look them up here. For CentOS 8, I had to install:
sudo dnf install openldap-devel python3-devel gcc
to make
python3 -m pip install --user python-ldap -U
work.

Install psycopg2 on Synology

I try to install psycopg2 on my DS2413+ (DSM 4.3). I've installed Python 2.7 with ipkg and pip. When I do :
/opt/local/bin/pip2.7 install psycopg2
I got the following error :
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
But I didn't found pg_config in my /usr/syno/ where a built in version of pgsql is already installed.
In other topics with this kind of error, they recommend to install python-dev, but I can't manage to install it on my NAS ... There is also a py26-psycopg2 ikpg but I need to install it on Python 2.7.
If anyone has a solution to these problem please tell me :')
Cheers
You don't need to install psycopg2, it is already installed in the site-packages if you used the official Synology python package, see
/usr/local/packages/#appstore/Python/usr/local/lib/python2.7/site-packages/
Also, using pip from ipkg may mess up your python install as there should really be one python2.7 installation.

pip install: How to force a specific package version

I'm trying to install Django 1.4.3, but when I execute pip install, pip keeps installing Django 1.5 version instead 1.4.3
sudo pip install -I Django==1.4.3
It returns:
Downloading/unpacking Django==1.4.3
Running setup.py egg_info for package Django
warning: no previously-included files matching '__pycache__' found under directory '*'
warning: no previously-included files matching '*.py[co]' found under directory '*'
=== >>>> Requested Django==1.4.3, but installing version 1.5 <<<< ====
Installing collected packages: Django
Found existing installation: Django 1.5
Uninstalling Django:
Successfully uninstalled Django
Running setup.py install for Django
warning: no previously-included files matching '__pycache__' found under directory '*'
warning: no previously-included files matching '*.py[co]' found under directory '*'
changing mode of /usr/local/bin/django-admin.py to 755
Successfully installed Django
Cleaning up...
but if I execute pip freeze, it keeps showing
Django==1.5
What am I doing wrong?
Thank you
This could/should/can be helped by clearing the build dir for Django in pip.
There is a bug for this, since version 1.1 see here for details
You can start checking for these folders here if you're on OS X or unix like systems:
~/.pip
/tmp/pip-build-root (or pip-build-$USER, if you aren't running pip as root).
This is if you haven't specified a new build folder when you installed the first version of Django.
Good luck!
As limelight says, you should empty your cache and build directories, or pass in a temporary clean location with the --download-cache and flag.
$ pip help install
[...]
--download-cache <dir> Cache downloaded packages in <dir>.
-b, --build <dir> Directory to unpack packages into and build in. The default in a virtualenv is "<venv path>/build". The default for global installs is
"<OS temp dir>/pip-build-<username>".
I'd like to warn any readers to not use sudo pip install to install Django. It installs Django system-wide. And changing the system-wide version could break system-packages that depend on it. For instance, Ubuntu MAAS and Cobbler depend on the system django package. These are typically services you don't want to break.
If you need a different version than the system-package, use virtualenv to isolate your dependencies from the system.
OP seems to be on OSX and I don't know of any server-wide Mac Django, but that may change. Consider installing python packages with sudo at par to changing the system-installed python with python 3; it might work for now, but have some paracetamol in stock, as you're in for some headaches.
Check your local cache and remove it can be help. I hava installed pymongo==2.5.2. To install pymongo==2.4.1, I remove the cache in /tmp/pip-build-root/pymongo.Then I install pymongo 2.4.1 successfully.