happysundar

RewriteEngine On

#
# This rewrite rule will change a URI from something like :
# http://foo.com/corpus/59/d0/400_59d022a8dcc082473fac85dbb219e724SongStream-ParadeofLights-ServerSide-640x765.png
# Notice this part of the URI ^^^ -- that becomes a query parameter...
# i.e, into http://foo.com/corpus/59/d0/59d022a8dcc082473fac85dbb219e724SongStream-ParadeofLights-ServerSide-640x765.png?width=400
# 

#

happysundar

    schema = Schema(
        {
            '--schema_dir':
                And(
                    And(
                        os.path.exists,
                        os.path.isdir,
                        lambda s: os.access(s, os.R_OK),
                        error="The path '%s' should be an existing directory and be readable. Please check" % arguments['--schema_dir']
                    ),

happysundar

"{:,}".format(value)

happysundar

Using Postgres.app

1. brew cask install postgres_app

2. In the current version of Postgres.app, the supplemental binaries are installed in /Applications/Postgres.app/Contents/Versions/9.3/bin, not in /Applications/Postgres.app/Contents/MacOS/bin. So, edit your .[bash|zsh]rc and add :

   export PSQL_PATH=/Applications/Postgres.app/Contents/Versions/9.3/bin

Followed by:

happysundar

 brew update && brew upgrade brew-cask && brew cleanup

happysundar

ansible-playbook -i ../vagrant/vagrant_ansible_inventory_default -u vagrant -vvv --private-key=/Users/sundar/.vagrant.d/insecure_private_key ./playbook.yml

happysundar

def check_env():
    (py_major, py_minor, py_patchlevel) = platform.python_version_tuple()
    if py_major != '2' and py_minor != '7':
        exit("This script should be run in python version 2.7.X. Current version of python is %s" % platform.python_version())
    if not hasattr(sys, 'real_prefix'):
        exit("This script should be run within a virtualevn. Have you run the 'workon <virtual_env_name>' command?")

happysundar

__filename = inspect.getframeinfo(inspect.currentframe()).filename
__path = os.path.dirname(os.path.abspath(filename))

# And then, do something like:
if not os.path.isabs(arguments['--bound-spec']):
    arguments['--bound-spec'] = os.path.normpath(os.path.join(__path, arguments['--bound-spec']))

happysundar

@staticmethod vs @classmethod

If you intend to refer to class variables within a @staticmethod, then you end up using the actual name of the enclosing class. This makes the method un-inheritable only in the cases you refer to the class variables, and the variables happen to be overriden in the subclass - it can still be called from the derived class / derived class instance. In other words, @staticmethods may not behave like proper, polymorphic methods when class variables are overridden.

class Base(object):
	class_vars = ['A','B','C']
	
	@staticmethod

happysundar

class DiGraph(object):
    def __init__(self):
        super(DiGraph, self).__init__()

        self.g = dict()

    def add_node_and_neighbors(self, node, neighbors):
        assert node
        assert isinstance(node, basestring)