Python Archives - Page 2 of 2

pip install mysqlclient mysql_config: not found

On Ubuntu 18.04, when i install mysqlclient python module, i get error

(venv) boby@sok-01:~/Downloads/django-deploy$ pip install mysqlclient==1.4.2.post1
Collecting mysqlclient==1.4.2.post1
  Using cached https://files.pythonhosted.org/packages/f4/f1/3bb6f64ca7a429729413e6556b7ba5976df06019a5245a43d36032f1061e/mysqlclient-1.4.2.post1.tar.gz
    ERROR: Complete output from command python setup.py egg_info:
    ERROR: /bin/sh: 1: mysql_config: not found
    Traceback (most recent call last):
      File "", line 1, in 
      File "/tmp/pip-install-we5rsid9/mysqlclient/setup.py", line 16, in 
        metadata, options = get_config()
      File "/tmp/pip-install-we5rsid9/mysqlclient/setup_posix.py", line 51, in get_config
        libs = mysql_config("libs")
      File "/tmp/pip-install-we5rsid9/mysqlclient/setup_posix.py", line 29, in mysql_config
        raise EnvironmentError("%s not found" % (_mysql_config_path,))
    OSError: mysql_config not found
    ----------------------------------------
ERROR: Command "python setup.py egg_info" failed with error code 1 in /tmp/pip-install-we5rsid9/mysqlclient/
WARNING: You are using pip version 19.1.1, however version 19.2.1 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
(venv) boby@sok-01:~/Downloads/django-deploy$

this is fixed by installing libmysqlclient-dev

apt install libmysqlclient-dev

ERROR: Failed building wheel for mysqlclient

See Python

Create a service file for gunicorn

root@django:~# cat /etc/systemd/system/gunicorn2.service
[Unit]
Description=gunicorn2 daemon
Requires=gunicorn2.socket
After=network.target

[Service]
User=ubuntu
Group=www-data
WorkingDirectory=/home/ubuntu/myapp/wagtail2
ExecStart=/home/ubuntu/myapp/venv/bin/gunicorn \
          --access-logfile - \
          --workers 3 \
          --bind unix:/run/gunicorn2.sock \
          wagtailblog4.wsgi:application

[Install]
WantedBy=multi-user.target
root@django:~#

Here

/home/ubuntu/myapp/wagtail2 = path to the folder where web application is.

/home/ubuntu/myapp/venv/bin/gunicorn = is where gunicorn installed inside virtualenv.

Change these path as required.

Restart gunicorn with

systemctl restart gunicorn2

use following nginx config

root@django:~# cat /etc/nginx/sites-enabled/django.conf
server {
    server_name domain.extn;

    location = /favicon.ico { access_log off; log_not_found off; }
    location /static/ {
        root /home/ubuntu/myapp/wagtail2;
    }
    
    location /media/ {
        root /home/ubuntu/myapp/wagtail2;    
    }

    location / {
        include proxy_params;
        proxy_pass http://unix:/run/gunicorn2.sock;
    }

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/domain.extn/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/domain.extn/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot


}
server {
    if ($host = www.domain.extn) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    if ($host = domain.extn) {
        return 301 https://$host$request_uri;
    } # managed by Certbot

    listen 80;
    server_name domain.extn www.domain.extn;
    return 404; # managed by Certbot
}
root@django:~#

Restart nginx

systemctl restart nginx

Installing PyCharm Community Edition on Ubuntu

PyCharm Community Edition is a free python editor from JetBrains. You can download it from

https://www.jetbrains.com/pycharm/download/#section=linux

Download and extact the tar.gz file. Move it to a folder like

tar xvf pycharm-community-2019.1.3.tar.gz
mkdir ~/programs
mv pycharm-community-2019.1.3 ~/programs

Execute sartup script

cd ~/programs/pycharm-community-2019.1.3/bin
./pycharm.sh

Once pycharm started, you can go to Tools menu and create a startup script.

July 11, 2019

Getting started with Django Framework

Django is a python framework for developing web applications. To install Django, run

pip install django

To create a project, run

django-admin startproject PROJECT_NAME

Django come with built in development server. To start Django development server, change to the project folder and run

./manage.py runserver

It will start a development web server on url http://127.0.0.1:8000/

Creating App

A django project consists of multiple apps. Apps do a specific task, can be considered as a module. To create an app, run

python manage.py startapp NAME_OF_APP

To activate the app, you need to edit file

vi PROJECT_NAME/settings.py

Find

INSTALLED_APPS

this list all installed apps, you need to add name of your app to end of the list.

July 10, 2019

Running Web Server with python SimpleHTTPServer

SimpleHTTPServer is a python module that allow you to run web server for static files.

To start web server, run

python -m SimpleHTTPServer

This will start a web server on port 8000.

You will be able to access server in URL

http://SERVER-IP:8000

To stop server, press CTRL + C

To get SimpleHTTPServer run on differnt port, run

python -m SimpleHTTPServer 80

This will run SimpleHTTPServer on port 80.

Python 3

Python 3 comes with bult in module http.server, to use it, run

python3 -m http.server

If you want to run on differnt port, specify port number

python3 -m http.server 9001

July 3, 2019

Creating and using virtualenv

To create a virtualenv, run

virtualenv NAME_OF_VIRTUALENV

virtualenv

On Ubuntu 18, this command will create virtualenv with Python 2.7.

To create virtualenv with Python 3, run

virtualenv --python=/usr/bin/python3 venv

Here “venv” is my virtualenv name.

python3 virtualenv

To activate virtialenv, go to the folder where your virtialenv folder is present, then run

source venv/bin/activate

You will see name of your virtualenv on the command promt. To exit out of virtualenv, run

deactivate

This can be run from any folder.

June 16, 2019

virtualenv

Install virtualenv on Ubuntu
Creating and using virtualenv

virtualenv is used to create isolated python environments.

With python3, you can create virtualenv with command

python -m venv FOLDER_NAME

Install virtualenv with setuptools

easy_install virtualenv

Create a folder

mkdir /root/virt_env/

Create virtualenv

virtualenv -p /usr/python3/bin/python3.3 /root/virt_env/virt1  --no-site-packages

Activate virtualenv

source /root/virt_env/virt1/bin/activate

To exit a virtualenv, run

deactivate

June 16, 2019

Install virtualenv on Ubuntu

To install virtualenv on Ubuntu, run

sudo apt install virtualenv

June 16, 2019

Install jupyter notebook

To install jupyter notebook on Ubuntu run

pip install jupyter

To start jupyter notebook, create an empty folder, change to it

mkdir ~/book
cd ~/book

Now run

jupyter notebook

By default, it bind to localhost. If you want to run on a public IP, run as follows

jupyter notebook --ip  198.50.234.187 --port 8888 --allow-root

Example

May 31, 2019

Django Framework

Django is a Python framework. You can find more info at

https://www.djangoproject.com

Django Tutorials

Getting started with Django Framework
https://realpython.com/tutorials/django/

Create Project

django-admin.py startproject

Create New Application

python manage.py startapp

Run Server

python manage.py runserver [IP:PORT]

Django framework run server command start development web server on port 8000

To run server on port 80, use

python manage.py runserver 0.0.0.0:80

if you are running as non root user, you won’t be able to use port 80. The solution is to run as user root or install a reverse proxy like Nginx.

Applications using Django

https://wagtail.io

February 20, 2019

Category: Python

pip install mysqlclient mysql_config: not found

Running Python Application with gunicorn and nginx

Installing PyCharm Community Edition on Ubuntu

Getting started with Django Framework

Creating App

Running Web Server with python SimpleHTTPServer

Python 3

Creating and using virtualenv

virtualenv

Install virtualenv on Ubuntu

gunicorn

Install jupyter notebook

Django Framework

Django Tutorials

Create Project

Create New Application

Run Server

Applications using Django