Doug Hellmann
https://twitter.com/doughellmann
Doug Hellmann is a Senior Software Engineer at Racemi and former
Editor in Chief for Python Magazine. He has been programming in Python since
version 1.4, and prior to Python worked mostly with C on a variety of
Unix and non-Unix platforms. He has worked on projects ranging from
mapping to medical news publishing, with a little banking thrown in
for good measure. He is interested in usability, development
processes, and dynamic languages. As a recent convert to Mac OS X, he
is learning AppleScript and Objective C.
Doug spends his spare time working on several open source projects;
reading science fiction, history and biographies; writing the Python
Module of the Week blog series; and enjoying his new patio. He lives
in Athens, GA with his wife and cats.
Recent Posts | All O'Reilly Posts
Doug blogs at:
http://oreilly.com/blogs/
PyMOTW: Creating XML Documents with ElementTree
March 21 2010
In addition to its parsing capabilities, ElementTree also supports creating well-formed XML documents from Element objects constructed in your application. read morePyMOTW: Parsing XML Documents with ElementTree
March 14 2010
Python's xml.etree.ElementTree library makes it easy to use XML data in your application or library. read morePyMOTW: tabnanny - Indentation validator
March 07 2010
Consistent use of indentation is important in a langauge like Python, where white-space is significant. The tabnanny module provides a scanner to report on "ambiguous" use of indentation. read morePyMOTW: cgitb - Detailed traceback reports
January 30 2010
cgitb was originally designed for showing errors and debugging information in web applications. It was later updated to include plain-text output as well, but unfortunately wasn't renamed. This has lead to obscurity and the module is not used as often as it should be. Nonetheless, cgitb is a valuable debugging… read moreDecember 06 2009
The list of invited speakers for PyCon 2010 has been announced, and I'm looking forward to seeing all of them. read morePyMOTW: sys, Part 6: Low-level Thread Support
November 15 2009
sys includes low-level functions for controlling and debugging thread behavior. read morePyMOTW: sys, Part 5: Tracing Your Program As It Runs
November 08 2009
There are two ways to inject code to watch your Python program run: tracing and profiling. They are similar, but intended for different purposes and so have different constraints. The easiest, but least efficient, way to monitor your program is through a trace hook, which can be used for writing… read morePyMOTW: sys, Part 4: Exception Handling
November 01 2009
sys includes features for trapping and working with exceptions. read morePyMOTW: sys, Part 3: Memory Management and Limits
October 25 2009
Python's sys module includes several functions for understanding and controlling memory usage. read morePyMOTW: sys, Part 2: Runtime Environment
October 18 2009
sys provides low-level APIs for interacting with the system outside of your application, by accepting command line arguments, accessing user input, and passing messages and status values to the user. read morePyMOTW: sys, Part 1: Interpreter Settings
October 12 2009
sys contains attributes and functions for accessing compile-time or runtime configuration settings for the interpreter. read morePyMOTW: resource - System resource management
September 20 2009
The functions in Python's resource module help you probe the current resources consumed by a process, and place limits on them to control how much load your program places on a system. read morePyMOTW: fractions - Rational Numbers
September 05 2009
Python's Fraction class implements numerical operations for rational numbers. read morePyMOTW: decimal - Fixed and floating point math
August 30 2009
The decimal module implements fixed and floating point arithmetic using the model familiar to most people, rather than the floating point representation implemented by most computer hardware. read morePyMOTW: dis - Python Bytecode Disassembly
August 23 2009
The dis module converts code objects to a human-readable representation of the bytecodes for analysis. read morePyMOTW: pydoc - Online help for Python modules
August 09 2009
The pydoc module imports a Python module and uses the contents to generate help text at runtime. read morePyMOTW: In-Memory Data Structures
August 02 2009
Python includes several standard programming data structures as built-in types (list, tuple, dictionary, and set). Most applications won't need any other structures, but when they do the standard library delivers. read moreJuly 27 2009
Python's standard library includes a variety of tools for working with text data. read moreJuly 19 2009
The urllib2 module provides an updated API for using internet resources identified by URLs. It is designed to be extended by individual applications to support new protocols or add variations to existing protocols (such as handling HTTP basic authentication). read morePyMOTW: abc - abstract base classes
July 05 2009
Define and use abstract base classes for API checks in your code using the abc module. read moreJune 28 2009
pyclbr can scan Python source to find classes and stand-alone functions. The information about class, method, and function names and line numbers is gathered using tokenize without importing the code. read moreJune 21 2009
robotparser implements a parser for the robots.txt file format, including a simple function for checking if a given user agent can access a resource. It is intended for use in well-behaved spiders or other crawler applications that need to either be throttled or otherwise restricted. read moreJune 14 2009
The gettext module provides an all-Python implementation compatible with the GNU gettext library for message translation and catalog management. read moreMay 24 2009
The json module provides an API similar to pickle for converting in-memory Python objects to a serialized representation known as "JavaScript Object Notation". read morePyMOTW: multiprocessing, part 2
April 28 2009
Communication and synchronization techniques using multiprocessing in Python. read morePyMOTW: multiprocessing, part 1
April 19 2009
The multiprocessing module includes a relatively simple API for dividing work up between multiple processes based on the API for the threading module. read moreApril 05 2009
The pipes module implements a class to create arbitrarily complex Unix command pipelines. Inputs and outputs of the commands can be chained together as with the shell | operator, even if the individual commands need to write to or read from files instead of stdin/stdout. read moreMarch 14 2009
The asynchat module builds on asyncore to make it easier to implement protocols based on passing messages back and forth between server and client. read moreMarch 01 2009
The asyncore module includes tools for working with I/O objects such as sockets so they can be managed asynchronously (instead of, for example, using threads). read moreFebruary 22 2009
The tarfile module provides read and write access to UNIX tar archives, including compressed files. In addition to the POSIX standards, several GNU tar extensions are supported. read moreFebruary 15 2009
The grp module can be used to read information about Unix groups from the group database (usually /etc/group). read moreFebruary 08 2009
The pwd module can be used to read user information from the Unix password database (usually /etc/passwd). read moreWriting Technical Documentation with Sphinx, Paver, and Cog
February 02 2009
An open source tool chain for producing technical articles. read moreJanuary 18 2009
Paver is a useful alternative to make, especially for Python-based packages. read moreJanuary 18 2009
The compileall module finds Python source files and compiles them to the byte-code representation, saving the results in .pyc or .pyo files. read moreJanuary 04 2009
The bz2 module is an interface for the bzip2 library, used to compress data for storage or transmission. read moreDecember 28 2008
The zlib module provides a low-level interface to many of the functions in the zlib compression library from GNU. read moreDecember 07 2008
The gzip module provides a file-like interface to GNU zip files, using zlib to compress and uncompress the data. read moreNovember 30 2008
readline – Interface to the GNU readline library Purpose:Provides an interface to the GNU readline library for interacting with the user at a command prompt. Python Version:1.4 and later The readline module can be used to enhance interactive command... read moreNovember 10 2008
The array module defines an efficient sequence data structure that works like a standard Python list. read moreNovember 02 2008
struct – Working with Binary Data Purpose:Convert between strings and binary data. Python Version:1.4 and later The struct module includes functions for converting between strings of bytes and native Python data types such as numbers and strings. Functions vs.... read moreOctober 19 2008
The smtpd module includes classes for building simple mail transport protocol servers. It is the server-side of the protocol used by smtplib. read moreRecent Posts | All O'Reilly Posts
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