import antigravity

import antigravity Making life more enjoyable with Python

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__.py congress/house.py congress/senate.py >>> import congress >>> congress.senate <module ‘senate’ from ... >>> from congress import senate >>> senate <module ‘senate’ from ...

$ cat congress/house.py def impeach(president): ... >>> from congress.house import impeach >>> if user.party != president.party: >>> impeach(president)

$ cat congress/__init__.py class 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.path True

distutils

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

$ python setup.py install running install running build ... $ python >>> import serpente >>> serpente.encode(2009) u’MMIX’

$ python setup.py sdist running sdist ... creating python-serpente-0.1 ... creating dist ... $ ls dist python-serpente-0.1.tar.gz

$ cat setup.py from distutils.core import setup from 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 register running register Using PyPI login from ~/.pypirc Server response (200): OK

setuptools distutils

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

pip setuptools distutils

$ pip install markdown ... Successfully installed markdown

$ pip freeze reqs.txt $ cat reqs.txt markdown==1.7 $ pip install -r reqs.txt ... Successfully installed

$ cat reqs.txt markdown==1.7 -e git://.../python-serpente.git#egg=serpente $ pip install -r reqs.txt Requirement already satisfied: markdown==1.7 ... Checking out serpente from git+git://... ... Successfully installed

So what about version conflicts?

virtualenv pip setuptools distutils

$ python virtualenv.py sandbox $ ls sandbox/ bin build include lib src $ ls sandbox/bin/python* sandbox/bin/python sandbox/bin/python2.5

$ pip install -E sandbox/ markdown ... Successfully installed markdown $ cd sandbox/lib/python2.5/site-packages $ ls markdown-1.7-py2.5.egg-info markdown.py python_serpente-0.1-py2.5.egg-info serpente.py

That’s too much typing.

virtualenvwrapper virtualenv pip setuptools distutils

$ 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/postactivate svn 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

@jcarbaugh github.com/sunlightlabs github.com/jcarbaugh

The End Creative Commons Attribution-Noncommercial-Share Alike 3.0

photo credits nostri-imago sailorganymede zkorb psmith fotopakismo su-lin

import antigravity

by Jeremy Carbaugh on Jun 01, 2009

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import antigravity — Presentation Transcript