As you all may know pip is a python package manager and everyone has worked with it to install python libs.

Some of the commands with pip that you may not know about it:

- freeze: output installed packages in requirements format. (you can grep and search for a specific package):

         rply==0.7.4
         rsa==3.2.3
         sasl==0.2.1
         scipy==0.13.0b1

- list: list installed packages:

tcpwatch (1.3.1)
         telebot (0.0.3)
         thrift (0.9.3)

- show: Show information about installed packages:

$ pip show pandas
         Name: pandas
         Version: 0.17.0
         Summary: Powerful data structures for data analysis, time series,and statistics
         Home-page: http://pandas.pydata.org
         Author: The PyData Development Team
         Author-email: pydata@googlegroups.com
         License: BSD
         Location: /Library/Python/2.7/site-packages
         Requires: numpy, python-dateutil, pytz

Important note for devops: pip by default install a stable version of the package. If you need to install an unstable version of the package (latest version) use --pre flag to install pre-release package.

If you want to manage your custom python repository package versions (RC, Alpha, Beta, Stable, etc) add classifiers to your setup.py script like below:

setup(...,
       classifiers=[
           'Development Status :: 4 - Beta',
           'Environment :: Console',
           'Environment :: Web Environment',
           'Intended Audience :: End Users/Desktop',
           'Intended Audience :: Developers',
           'Intended Audience :: System Administrators',
           'License :: OSI Approved :: Python Software Foundation License',
           'Operating System :: MacOS :: MacOS X',
           'Operating System :: Microsoft :: Windows',
           'Operating System :: POSIX',
           'Programming Language :: Python',
           'Topic :: Communications :: Email',
           'Topic :: Office/Business',
           'Topic :: Software Development :: Bug Tracking',
           ],
       )

The important part is Development Status :: 4 - Beta, which for stable release you would use Development Status :: 5 - Production/Stable.

To see list of pypi Development Status values read from the below link:
https://pypi.python.org/pypi?%3Aaction=list_classifiers

Now you can give versioning like Django 2.0b1 (for pre release) and Django 1.11.6 for stable release.
To see different classifiers see the link Django link below to learn more:
https://pypi.python.org/pypi/Django

#django #pip #pre_release #freeze #package #python #devops

pip install from git repository:

pip install git+https://github.com/tangentlabs/django-oscar-paypal.git@issue/34/oscar-0.6

#git #repo #pip #install

Installation of Django

If you have not yet installed django on your system, install it using the below command:

$ sudo pip install django
Password:
Collecting django
  Downloading Django-1.11.6-py2.py3-none-any.whl (6.9MB)
    100% |████████████████████████████████| 7.0MB 174kB/s
Requirement already satisfied: pytz in /Library/Python/2.7/site-packages (from django)
Installing collected packages: django
Successfully installed django-1.11.6

After installation you can check the validity of the Django installation:

$ python -m django --version
1.11.6

What does -m do in the above command:

-m module-name
        Searches sys.path for the named module and runs the corresponding .py file as a script.

To see list of django-admin subcommands:

$ django-admin help

Type 'django-admin help <subcommand>' for help on a specific subcommand.

Available subcommands:

[django]
    check
    compilemessages
    createcachetable
    dbshell
    diffsettings
    dumpdata
    flush
    inspectdb
    loaddata
    makemessages
    makemigrations
    migrate
    runserver
    sendtestemail
    shell
    showmigrations
    sqlflush
    sqlmigrate
    sqlsequencereset
    squashmigrations
    startapp
    startproject
    test
    testserver
Note that only Django core commands are listed as settings are not properly configured (error: Requested setting INSTALLED_APPS, but settings are not configured. You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings.)

That's it! Welcome to the Django world. :)

#python #django #installation #pip #django_part1

To install your python module you need a setup.py file inside of your project. The content of the setup.py can be something like below:

setup(name=PROJECT_NAME,
       version=PROJECT_VERSION,
       description=PROJECT_DESCRIPTION,
       long_description=PROJECT_LONG_DESCRIPTION,
       author='Ali',
       author_email='info@ali.com',
       url='http://www.ali.com/',
       license='SOMETHING',
       entry_points=PROJECT_ENTRY_POINTS,
       classifiers=[],
       keywords='',
       packages=find_packages(exclude=['ez_setup', 'examples', 'tests']),
       include_package_data=True,
       namespace_packages=[],
       install_requires=['LIST', 'OF', 'REQUIREMENTS'],
       zip_safe=False,
       test_suite='nose.collector')

Now if you want to install it on your machine as a package just:

python setup.py install

If you want to upload it into your python repository:

python setup.py sdist upload -r my_repo

NOTE: you should be in the root of your project before running the previous command.

my_repo server should be declared inside of ~/.pypirc:

[distutils]
  index-servers =
      my_repo

  [my_repo]
  repository: http://pypi.repo.my_host.com:5000
  username: username
  password: password

If you want to install something from your repository via pip you have to provide the extra-index-url argument:

--extra-index-url http://username:password@pypi.repo.my_host.com:5000 --trusted-host pypi.repo.my_host.com

NOTE: you can put inside of an ENV variable in OS to access it better and in more readable way.

#python #setuppy #setup #package #pypi #private_repo #pypirc #pip #install

http://pygments.org/

This is a syntax highlighter that creates permanent link for your code in a variety of languages including python in the provided link.

#python #pip #syntax_highlighter #highlighter #pygments

Some useful pip (python package manager) command:

show: used to know specific information about a module installed on your system:

$ pip show requests
 Name: requests
 Version: 2.13.0
 Summary: Python HTTP for Humans.
 Home-page: http://python-requests.org
 Author: Kenneth Reitz
 Author-email: me@kennethreitz.com
 License: Apache 2.0
 Location: /Library/Python/2.7/site-packages
 Requires:

search: used to search a python package on pypi.python.org:

$ pip search "suds"
 suds-aop (0.6.1)                  - Lightweight SOAP client (aop's fork)
 ...
 ...
 ...

NOTE: the above list is truncated.

list: list installed packages.

pip list

NOTE: you can grep on pip list to see if a specific package is installed or check its version:

pip list | grep "requests"

freeze: this command does the the same task as list, but its output can be placed inside of the requirements.txt.

uninstall: remove a package from your system:

pip uninstall requests

#python #pip #list #freeze #show #info #search

If you run python using uwsgi you may get an error like below:

open("./python_plugin.so"): No such file or directory [core/utils.c line 3321]
 !!! UNABLE to load uWSGI plugin: ./python_plugin.so: cannot open shared object file: No such file or directory !!!

This error says that the plugin is not loaded. This error happens when you install uwsgi using pip. Distros should package uWSGI in a modular way, with each feature as a plugin. But when you install using language specific ways (pip, gem...) the relevant language is embedded, so you do not need to load the plugin.

#python #uwsgi #pip

Babel:
Babel is an integrated collection of utilities that assist in internationalizing and localizing Python applications, with an emphasis on web-based applications.

pip install Babel

More information:
- http://babel.pocoo.org/en/latest/index.html

#python #pocoo #pip #babel #internationalization #localization