Popular recipes by Jimmy Retzlaff

Terminating a subprocess on Windows (Python)

2004-11-24T12:52:28-08:00

Python recipe 347462 by Jimmy Retzlaff (sysadmin).

The new subprocess module in Python 2.4 (also available for 2.2 and 2.3 at http://effbot.org/downloads/#subprocess) allows access to the handle of any newly created subprocess. You can use this handle to terminate subprocesses using either ctypes or the pywin32 extensions.

attrdict - a dict whose items can also be accessed as member variables (Python)

2005-01-03T20:20:38-08:00

Python recipe 361668 by Jimmy Retzlaff (shortcuts). Revision 2.

Sometimes accessing dictionary items as if they were member variables can be convenient.

Load data in a web browser without using temp files (Python)

2004-12-21T07:50:58-08:00

Python recipe 347810 by Jimmy Retzlaff (shortcuts). Revision 3.

It is often nice to display something in a web browser, perhaps as an easy way to display rich output or for testing purposes. Sometimes the baggage of a temporary file is not desired when doing this.

A Generator That Helps Simplify Queue Consumers (Python)

2003-12-04T17:29:35-08:00

Python recipe 252498 by Jimmy Retzlaff (shortcuts).

My Queue usage typically involves a producer thread and a consumer thread. The producer calls queue.put(value) until it's done at which point it calls queue.put(sentinel). My consumers almost always look like this:

while True: value = queue.get() if value != sentinel: # do something with value else: break

That logic can be abstracted away into a generator function that allows consumer code to look like this instead:

for value in iterQueue(queue, sentinel): # do something with value

Simplify Assignment to Member Variables (Python)

2002-10-19T04:09:35-07:00

Python recipe 157572 by Jimmy Retzlaff (shortcuts).

Writing code like this can be very repetitive:

class c: def __init__(self, memberVariableNumberOne, memberVariableNumberTwo): self. memberVariableNumberOne = memberVariableNumberOne self. memberVariableNumberTwo = memberVariableNumberTwo

The above can be changed to:

class c: def __init__(self, memberVariableNumberOne, memberVariableNumberTwo): AssignMemberVariablesFromParameters()

Loose Coupling (Python)

2001-10-16T07:44:18-07:00

Python recipe 81983 by Jimmy Retzlaff (oop). Revision 2.

The "broadcaster" and "broker" modules enable loose coupling between objects in a running application.