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

put a key in dictionary into another key and remove it from dictionary:

Idiots way:

data = {
     'username': 'alireza@gmail.com'
 }
 data['email'] = data['username']
 del data['username']

Tech C**P way:

data = {
     'username': 'alireza@gmail.com'
 }
 data['email'] = data.pop('username')

pop access the data and remove it from data payload. In case username is not in data, an error will be raised. To prevent such an error give it default value:

data['email'] = data.pop('username', 'NO_USERNAME')

#pop #python #dictionary #code_improvement

A Fantastic completely FREE course to implement ONLINE ESHOP using vue.js:

https://scotch.io/courses/build-an-online-shop-with-vue

There is a mgic method in python called contains which should return true if item is in self, false otherwise.
The method signature of contains:

object.__contains__(self, item)

Samples:

>>> 'sample_output'.__contains__('sample')
 True
 >>> 'sample_output'.__contains__('ASL')
 False

BUT DONT USE this magic methods this way, as it should be used in internal class operations.
Membership test operator for this is in. In case you want to test membership:

>>> 'sample' in 'sample_output'
 True
 >>> 'ASL' in 'sample_output'
 False

Side note: methods which are started by _ (underscore) should not be called directly outside of class scope. They meant for internal class operations.

#python #membership #in #contain #exist

OneSignal - free multiplatform push notification service

Send 100% FREE push notifications to Android, iOS, Web by their completely free SDKs on OneSignal. #OneSignal is multiplatform push notification service that you just interact with it using API calls in JSON format. It has a thorough documentation for SDKs and Server API.

* BE AWARE THAT use OneSignal in case your user's privacy does not matter to you! They have mentioned in their privacy policy that they sell this information!!! All device locations, user email addresses and all the other sensetive data will be collected by OneSignal.

#push_notification #push #ios #android #web #notification #one_signal

It is sometimes tempting to log less in order to let's say improve performance or save disk space, and blah blah blah!

Loggers in python are the last thing to think about when you think about performance. You can place log ratote to use less disk space. From my own experience log as much as you can. Log as every step necessary to make log level verbose. At last in case you think you application is very stable you change log level to info, and all debug logs are ignored.

It took sometimes hours to debug a few modules (in microservice structure) to find the culprit, something that could have been solved by putting more logs.

Log, log and log more...

#python #log #logger #performance

https://github.com/channelcat/sanic

#sanic #python #async #flask #framework

UWSGI - Web server Gateway Interface
-----
uwsgi is a big C application which is used to deploy python applications on server. There is a full documentation of UWSGI in readthedocs, follow it and master it to handle loads of requests concurrently and use graceful reloading of the app. It is usually put behind a full web server like nginX by proxying.

Reference: http://uwsgi-docs.readthedocs.io/en/latest/WSGIquickstart.html

#python #uwsgi #reference #flask #readthedocs

https://github.com/KaveNegar/kavenegar-python

#python #sms #kavenegar #send_sms #api #sdk

http://www.persiangig.com/virtual-private-server/

#vps #server #persiangig #linux #low_price #off

جلسه ۴۹ گروه کاربران پایتون تهران، پنجشنبه ۱۱ آبان ۱۳۹۶ از ساعت ۱۴:۳۰ تا ۱۶:۰۰ در «شتاب‌دهندهٔ آواتک» به نشانی «تهران، خیابان کارگر شمالی، بالاتر از بزرگراه جلال آل احمد، پردیس دانشکده‌های فنّی دانشگاه تهران، دانشکدهٔ مهندسی نفت، طبقهٔ پنجم» برگزار خواهد شد.


در صورتی که داوطلب ارائه فنی هستید موضوع ارائه خود را به میلینگ لیست گروه کاربران پایتون تهران ارسال کنید.
https://mail.python.org/mailman/listinfo/tehpug
یا به بنده پی ام دهید.

PART-1: Basic docker commands

* Let's suppose you have built an image.

Display list of your docker images:

docker images

Output:

REPOSITORY                    TAG                 IMAGE ID            CREATED             SIZE
py_app                       latest              baa470dc5609        3 weeks ago          591MB

As you can see image name is py_app.

To run the image:

docker run -it -d -p 8085:8084 py_app

The above command runs the docker image. The newly created processs by docker run from your py_app image is called a container. -d runs the image as a daemon and print the container id to your console:

$ docker run -it -d -p 8085:8084 py_app
d612ffbd9d560158f1c64997f9a8877243cdf4288c11010298df80b10cfaff5e

-p exposes the port on your docker file to the port on your host machine. The first port 8085 is the port on your
host, and the second port 8084 is the port on your docker file.

Now to see list of your containers use docker ps:

docker ps
CONTAINER ID        IMAGE               COMMAND                  CREATED             STATUS              PORTS               NAMES
d612ffbd9d56        py_app             "python app.py"        10 minutes ago      Up 10 minutes                           goofy_hopper

From here you can see the ID of your container which is equal to d612ffbd9d56. IF you want to have a shell on your c
ontainer (login into container):

docker exec -it d612ffbd9d56  bash
root@moby:/app#

if you want to connect to the stdout of your container use attach, it does not necessary give you a shell:

docker attach d612ffbd9d56

*** IF you are attached to a container and press ^c afterward, the container will be stopped.

If you want to stop a container:

$ docker stop d612ffbd9d56
d612ffbd9d56

It prints out container id d612ffbd9d56 and stop the container. If you enter docker ps you should not see the container.

#docker #commands #docker_part1 #basic #container #devops

What curriculum you are interested in? From now on we will focus more on the specific topics.

Django – 19
👍👍👍👍👍👍👍 58%

Devops (Docker,...) – 7
👍👍👍 21%

Microservice architecture, implementation – 4
👍 12%

Flask – 2
👍 6%

ReactJS – 1
▫️ 3%

👥 33 people voted so far.