import antigravity

Making life more enjoyable with Python

import antigravity

My name is Jeremy Carbaugh

sucks at technology

Python

modules

$ cat markdown.py...def markdown(text, ...):...

>>> from markdown import markdown>>> markdown(‘# Python!’)u’<h1>Python!</h1>’

congress/__init__.pycongress/house.pycongress/senate.py

>>> import congress>>> congress.senate<module ‘senate’ from ...

>>> from congress import senate>>> senate<module ‘senate’ from ...

$ cat congress/house.pydef impeach(president): ...

>>> from congress.house import impeach>>> if user.party != president.party:>>> impeach(president)

$ cat congress/__init__.pyclass Bill(object): def __init__(self, chamber, number, title): self.chamber = chamber self.number = number self.title = title

>>> from congress import Bill>>> hr45 = Bill(‘House’, 1811, ‘GREEN Act’)

GREEN Act

To authorize the President to review and approve oil and gas exploration, development, and production projects under existing Federal oil and gas leases, both onshore and offshore, and to limit administrative and judicial proceedings with respect to such projects, upon finding that such a project complies with all applicable Federal laws, and for other purposes.

sys.path

current directory$PYTHONPATH

default paths

>>> import sys>>> for path in sys.path:... print path

/usr/lib/python2.5/usr/lib/python2.5/plat-linux2/usr/lib/python2.5/lib-dynload/usr/local/lib/python2.5/site-packages/usr/lib/python2.5/site-packages/var/lib/python-support/python2.5

>>> sys.path.append(‘/path/to/lib’)>>> ‘/path/to/lib’ in sys.pathTrue

distutils

$ cat setup.pyfrom distutils.core import setupfrom serpente import __version__ setup( name='python-serpente', version=__version__, py_modules=['serpente'],)

$ python setup.py installrunning installrunning build...

$ python>>> import serpente>>> serpente.encode(2009)u’MMIX’

$ python setup.py sdistrunning sdist...creating python-serpente-0.1...creating dist...

$ ls distpython-serpente-0.1.tar.gz

PyPI

$ cat setup.pyfrom distutils.core import setupfrom serpente import __version__ setup( name='python-serpente', version=__version__, description='Roman numeral encoder and decoder', license='BSD License', author='Jeremy Carbaugh', author_email='jeremy@200ok.net', url='http://github.com/jcarbaugh/python-serpente/', py_modules=['serpente'], classifiers=[ 'Development Status :: 4 - Beta', 'Intended Audience :: Developers', 'License :: OSI Approved :: BSD License', 'Natural Language :: English', 'Operating System :: OS Independent', 'Programming Language :: Python', ],)

$ python setup.py registerrunning registerUsing PyPI login from ~/.pypircServer response (200): OK

setuptoolsdistutils

$ easy_install markdownSearching for markdown...Finished processing dependencies for markdown

pipsetuptoolsdistutils

$ pip install markdown...Successfully installed markdown

$ pip freeze reqs.txt$ cat reqs.txtmarkdown==1.7

$ pip install -r reqs.txt...Successfully installed

$ cat reqs.txtmarkdown==1.7-e git://.../python-serpente.git#egg=serpente

$ pip install -r reqs.txtRequirement already satisfied: markdown==1.7...Checking out serpente from git+git://......Successfully installed

So what about version conflicts?

virtualenvpip

setuptoolsdistutils

$ python virtualenv.py sandbox

$ ls sandbox/bin build include lib src

$ ls sandbox/bin/python*sandbox/bin/pythonsandbox/bin/python2.5

$ pip install -E sandbox/ markdown...Successfully installed markdown

$ cd sandbox/lib/python2.5/site-packages

$ lsmarkdown-1.7-py2.5.egg-infomarkdown.pypython_serpente-0.1-py2.5.egg-infoserpente.py

That’s too much typing.

virtualenvwrappervirtualenv

pipsetuptoolsdistutils

$ mkvirtualenv sandbox(sandbox)$

(sandbox)$ deactivate$

$ workon sandbox(sandbox)$

$ pip install -E sandbox/ markdown

$ workon sandbox(sandbox)$ pip install markdown

(sandbox)$ add2virtualenv \> /usr/local/src/django-trunk

(sandbox)$ cdsitepackages

(sandbox)$ cdvirtualenv

(sandbox)$ cat bin/postactivatesvn up /usr/local/src/django-trunk

(sandbox)$ deactivate

$ workon sandbox...Updated to revision 10844.

let’s wrap this up

$ mkvirtualenv labs

(labs)$ svn co http://.../trunk/ sunlightlabs

(labs)$ cd sunlightlabs

(labs)$ pip install -r reqs.txt

(labs)$ mate .

(labs)$ ./manage.py runserver

github.com/sunlightlabs

github.com/jcarbaugh

@jcarbaugh

The End

Creative Commons Attribution-Noncommercial-Share Alike 3.0

photo credits

sailorganymede

psmith

fotopakismo

su-lin

nostri-imago

zkorb