Saturday, January 10, 2009

Announcing jsonpickle-0.2.0

jsonpickle 0.2.0 has been tagged and released.

There are a huge number of changes improving jsonpickle's ability to work with other Python objects.

David Aguilar also added a superb json backend loader that allows the user to specify which json module to use (simplejson, demjson, cjson, json).

Please check out the new documentation

Thanks so much everyone who submitted issues to the mailing list and contributed time and effort!


Announcing stopwatch 0.3.1

There is a new release of stopwatch, a simple utility for measuring time in Python. The release addes a simple decorator for functions to print the execution time of each call to that function.

>>> from stopwatch import clockit
>>> @clockit
def multiply(a, b):
return a * b
>>> r = multiple(4, 5)
multiple in 1.38282775879e-05 sec
>>> print r

You can obtain the new release with easy_install
easy_install -U stopwatch

or download the appropriate release.

Friday, January 9, 2009

Announcing python-hl7

python-hl7 is a simple Python library for parsing Health Level 7 version 2.x messages. The library allows for easy, key-based access of all the elements in an HL7 message.

HL7 is a communication protocol and message format for health care data. It is the de facto standard for transmitting data between clinical information systems and between clinical devices. The version 2.x series, which is often is a pipe delimited format is currently the most widely accepted version of HL7 (version 3.0 is an XML-based format).

The current implementation of python-hl7 does not completely follow the HL7 specification, but is good enough to parse the most commonly seen HL7 messages. The library could potentially evolve into being fully complainant with the spec. The library could eventually also contain the ability to create HL7 v2.x messages.

As an example, let's create a HL7 message:

>>> message = 'MSH|^~\&|GHH LAB|ELAB-3|GHH OE|BLDG4|200202150930||ORU^R01|CNTRL-3456|P|2.4\r'
>>> message += 'PID|||555-44-4444||EVERYWOMAN^EVE^E^^^^L|JONES|196203520|F|||153 FERNWOOD DR.^^STATESVILLE^OH^35292||(206)3345232|(206)752-121||||AC555444444||67-A4335^OH^20030520\r'
>>> message += 'OBR|1|845439^GHH OE|1045813^GHH LAB|1554-5^GLUCOSE|||200202150730||||||||555-55-5555^PRIMARY^PATRICIA P^^^^MD^^LEVEL SEVEN HEALTHCARE, INC.|||||||||F||||||444-44-4444^HIPPOCRATES^HOWARD H^^^^MD\r'
>>> message += 'OBX|1|SN|1554-5^GLUCOSE^POST 12H CFST:MCNC:PT:SER/PLAS:QN||^182|mg/dl|70_105|H|||F\r'

We call the hl7.parse() command with string message:

>>> import hl7
>>> h = hl7.parse(message)

We get a n-dimensional list back:

>>> type(h)

There were 4 segments (MSH, PID, OBR, OBX):

>>> len(h)

We can extract individual elements of the message:

>>> h[3][3][1]
>>> h[3][5][1]

We can look up segments by the segment identifer:

>>> pid = hl7.segment('PID', h)
>>> pid[3][0]


python-hl7 will work with Python 2.5, 2.6, and 3.0. It is under a BSD license.

The easiest way to obtain the package is with easy_install
easy_install hl7

An egg and tar.gz file can be downloaded from PyPi

You can always clone or fork the source:
hg clone