Thread locals are an interesting idea: a way to give each thread its own storage, useful for global state that you don't want to share between threads.
The obvious caveat is that threadlocals are still effectively global (for the current thread), and like all global state, should be treated with …
Does this return all the data?
urllib2.urlopen(url).read()
The answer appears to be "not always".
https://stackoverflow.com/questions/7174927/when-does-socket-recvrecv-size-return https://github.com/CVL-dev/feedparser/issues/1
I can't seem to get a definitive answer here, nor a reproducible demonstration of it failing.
Does anybody know for …
In Python we often use the mock library to do dependency injection for
tests. Recently I came across a really confounding edge case that can be easily
avoided if you know about it.
(Skip this section if you're already familiar with mock.)
Let's say we have a …
Some notes on my emacs setup circa 2015, mostly about Python.
For the latest, see more recent posts tagged emacs and/or my emacs config repo
There is python-mode.el, and python.el. I have settled on python-mode from the elpa repositories.
Why? The built-in python.el …
So it turns out there are some painful edges if you start trying to do SQLAlchemy declarative ORM classes in an existing Django app. (For example, if you're gradually replacing the Django ORM in your code with Sqlalchemy ORM). It boils down to:
The django testrunner (or django-nose) changes the …
Here's a typical loop that checks for some condition and breaks the first time it passes:
def list_contains_urls(maybe_urls):
for url in maybe_urls:
if url.startswith('http'):
return True
return False
Can we do that more concisely? Sure.
def list_contains_urls(maybe_urls):
return any(u for u in maybe_urls if u …