Peak in to see how it looks like to get started in python

1. My First Python Project
Neetu Jain
Software Engineer
Softlayer, IBM
nutshi@gmail.com, njain@softlayer.com

2. What’s Ahead?
What to expect when diving into python:
Bird’s eye view of “getting started into python”
How to start your first python project:
some kind of a skeleton , resources, pointers
Help you realise that some comics hit close to home:
Thanks to xkcd.com
*** if you already know python, you might not get much out of this talk :)***

3. First Stop:Install
Python Version:
Python 2.x or Python 3.x
Python IDE:
Pycharm, pythonwin, sublime ...e.t.c
version control:
git, svn...e.t.c

4. Readability(whitespace) Matters!

5. Zen Of Python
PEP8
pip install --upgrade pep8
pep8 --show-source --show-pep8 test.py
4685 E501 line too long (80 > 79 characters)
1718 E302 expected 2 blank lines, found 1
pep8 --statistics -qq Project/
Pylint
pip install pylint
pylint --reports=n test.py
C0111: 4,0:sth1: Missing docstring
W0104: 5,4:sth1: Statement seems to have no effect

6. No More Compiler Breaks!

7. Nostalgia!

8. Bye Bye Static Typing

9. Built-in Data Structures
● Sets
● List
● Tuple
● Dictionary

10. No Pointers->No Segfaults
*forget memory management and issues that arise from it*

11. Recycling Wins Reinventing
Not likely in Python

12. Power of PyPi
$pip install newpackage
$import newpackage
$newpackage.callitsfunction()

13. Testing Tools Ensure Automation
**https://wiki.python.org/moin/PythonTestingToolsTaxonomy**

14. Tests:made easy
$python unittest_simple.py
$ python unittest_simple.py -v
test (__main__.SimplisticTest) ... ok
------------------------------------
Ran 1 test in 0.000s
OK/FAIL/ERROR
unittest_simple.py
import unittest
class FixturesTest(unittest.TestCase):
def test(self):
print 'in test()'
self.failIf(True, 'failure message goes here')
if __name__ == '__main__':
unittest.main()

15. Python: you can do a lot!
Process mgmt: supervisor
Deployment mgmt :fabric Database: sqllite
Web framework:flask Messaging: pika(amqp)

17. Virtual environment
$ [sudo] pip install virtualenv
$ cd ~/code/myproject/
$ virtualenv env
New python executable in env/bin/python
Installing setuptools............done.
Installing pip...............done.
$ ls env
bin include lib
$ which python
/usr/bin/python
$ source env/bin/activate
$ which python
/Users/name/code/myproject/env/bin/python

18. Directory structure some_root_dir/
|-- LICENSE
|-- README
|-- setup.py
|-- example_project/
| |-- __init__.py
| |-- useful_1.py
| |-- drivers/
| | |--useful_2.py
|-- tests/
| |-- __init__.py
| |-- runall.py
| |-- test0.py
|-- docs/
| |--conf.py
| |--generated

19. Setup.py
from setuptools import setup, find_packages
setup(
name='buzz',
version='0.1',
description=Project name ',
long_description=open('README.md', 'r').read(),
classifiers=[
'Development Status :: 1 - Beta',
'Programming Language :: Python :: 2.7',
],
author_email='innovation@softlayer.com',
url='http://sldn.softlayer.com',
license='MIT',
packages=find_packages(),
include_package_data=True,
install_requires=[
‘package-name’,
‘docutils>=0.3’,
],
entry_points={
'console_scripts': [
'face_of_project = module:your_function,
]
},
#just download not install
setup_requires=[],
)

20. vagrant VM manager
$ vagrant box add lucid32 http://files.vagrantup.com/lucid32.box
$ mkdir my_vagrant_test
$ cd my_vagrant_test
$ vagrant init lucid32
$ vim Vagrantfile
$ vagrant up
$ vagrant ssh
$ vagrant status
$ vagrant reload
$ vagrant destroy

21. Supervisor: A Process Control System
vagrant@buzz:~$ supervisord -c /vagrant/scripts/supervisord.conf
vagrant@buzz:~$ sudo supervisorctl -c /vagrant/scripts/supervisord.conf
apnsfb RUNNING pid 5671, uptime 0:02:17
buzz RUNNING pid 5673, uptime 0:02:17
flask RUNNING pid 5672, uptime 0:02:17
vagrant@buzz:~$ cat /tmp/supervisord.log
2014-09-12 18:31:22,001 CRIT Supervisor running as root (no user in config
file)
2014-09-12 18:31:22,017 INFO RPC interface 'supervisor' initialized

22. My First Python Project
Neetu Jain
Software Engineer
Softlayer, IBM
nutshi@gmail.com, njain@softlayer.com