Why Python is not my favorite language. 1.In Python, an assignment to the non existing variable raises no alert.
You will not be warned during compilation and you will not get any alert on execution. Instead, a new variable with your typo will be created, it will store the assigned value, and the original value that was meant to be changed will stay as it was. It will be no obvious crash anywhere, just a buggy behavior to debug. Dive Into Python. Home - filemap - GitHub. Wow, the gzip module kinda sucks. I needed to scan some pretty massive gzipped text files, so my first try was the obvious "for line in gzip.open(...).
" This worked but seemed way slower than expected. So I wrote "pyzcat" as a test and ran it against a file with 100k lines: #! Psyco - Home Page. MySQLdb User's Guide. If you want to write applications which are portable across databases, use MySQLdb, and avoid using this module directly.
_mysql provides an interface which mostly implements the MySQL C API. For more information, see the MySQL documentation. The documentation for this module is intentionally weak because you probably should use the higher-level MySQLdb module. If you really need it, use the standard MySQL docs and transliterate as necessary. Okay, so you want to use _mysql anyway. Writing MySQL Scripts with Python DB-API. Paul DuBoispaul@kitebird.com Document revision: 1.02 Last update: 2006-09-17 Table of Contents.
The Django Book. Python Tutorials, more than 300, updated October 16, 2006, and c. Audio Podcasts from PyCon 2009 ShowMeDo's Learning Path Tutorials Setting Up Python Beginning Python Programming Intermediate Python Python for Strong Pythonistas Full Projects in Python pyGame for Python Games Python 3.0 Introduction Scientific Python Programming Python GUI Programming Beginner Python Web Programming Beginner Django Programming Python IDEs and Tools New Stuff Create Python GUIs using HTML Online Videos from PyCon 2009 Functional Testing of GUI Applications Metaclasses in Five Minutes Easy AI with Python by Richard Hettinger Generator Tricks for Systems Programmers A Curious Course on Coroutines and Concurrency Monads in Python Python 3.0 Tutorial Short Intro to Python by Alex Martelli.
Clever, witty blog title » Blog Archive » Collaborative filterin. During a lunchtime conversation the other day, a coworker mentioned that he was hacking in his spare time on an entry for the Netflix Prize.
This got me to thinking about collaborative filtering: why had I never seen a good description of how to do it? I suspect that people who might ordinarily have a casual interest in the subject hear that there are some statistics involved, whereupon they immediately freeze in the mathematical headlights, and turn the conversation to something else, anything else. In early 2005, a researcher named Daniel Lemire published, with Anna Maclachlan, a paper with the jazzy title of “Slope One Predictors for Online Rating-Based Collaborative Filtering“.
This is an important paper, because it presents a family of really simple collaborative filtering schemes. I mean really simple: there are no statistics involved, just a little bit of linear algebra. Tutorial. Python is an easy to learn, powerful programming language.
It has efficient high-level data structures and a simple but effective approach to object-oriented programming. Python’s elegant syntax and dynamic typing, together with its interpreted nature, make it an ideal language for scripting and rapid application development in many areas on most platforms. The Python interpreter and the extensive standard library are freely available in source or binary form for all major platforms from the Python Web site, and may be freely distributed.
Xah: A Perl-Python A Day. This is a tutorial on Perl, Python, and few other dynamic languages.
The tutorial is concrete, example based, covering a practical subset of the language, using universal language features. The goal is to get you quickly started. You can start coding toy programs after a few hours. Dive Into Python.