Coverage.py — Coverage.py 7.4.4 documentation
Coverage.py Coverage.py is a tool for measuring code coverage of Python programs. It monitors your program, noting which parts of the code have been executed, then analyzes the source to identify code that could have been executed but was not. Coverage measurement is typically used to gauge the effectiveness of tests. It can show which parts of your code are being exercised by tests, and which ar
Facts and myths about Python names and values
Created 6 July 2013, last updated 26 January 2014 This page is also available in Turkish. The behavior of names and values in Python can be confusing. Like many parts of Python, it has an underlying simplicity that can be hard to discern, especially if you are used to other programming languages. Here I’ll explain how it all works, and present some facts and myths along the way. BTW: I worked this
Explaining descriptors
I’ve always found descriptors to be one of the more confusing corners of Python. Partly, I think that’s to do with the explanations in the docs, which I find opaque: In general, a descriptor is an object attribute with “binding behavior”, one whose attribute access has been overridden by methods in the descriptor protocol. What is binding behavior, and why is it in quotes? This lead sentence hints
Stupid languages
A popular pastime among programmers is to make fun of programming languages, or at least the one you choose not to use. For example, Gary Bernhardt’s 5-minute talk WAT is all about unexpected behavior, mostly in Javascript. Today brought another example of surprising Javascript behavior: > ['10', '10', '10', '10', '10'].map(parseInt) [ 10, NaN, 2, 3, 4 ] I looked at this and thought, like most oth
Pragmatic Unicode
Created 10 March 2012 This is a presentation I gave at PyCon 2012. You can read the slides and text on this page, or open the actual presentation in your browser, or watch the video: Also, clicking the slide images will jump into the full presentation at that point. The Symbola font is included, but will have to be downloaded before some of the special symbols will appear. Hi, I’m Ned Batchelder.
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Watchgha
Adding a dunder to an object
Gefilte Fish: gmail filter creation
Ned Batchelder: A thing I learned about Python recursion
SVG figures with Cupid
Python nugget: renumbering ids
Un-ABC
Range overlap in two compares
Names and values: making a game board
How many instructions in a print statement?
Ad-hoc decoding a backdoor
Hunting a random() bug
Finding Python 3 builtins
Looking for Python 3 builtins
Implementing rpartition