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Notes From PyATL 2014-07-10
The Weather Channel is hiring
So is AirSage (sp?)
Functional Programming in Python - A Sampler (Cliff)
Functional programming languages make big promises
Makes it easy to write robust, modular, decoupled code
They’re easy to test (since output is solely dependent on input)
They make programming fun
Do they deliver?
Didn’t find it worth the switching costs, personally.
Has a problem with the no I/O thing
I don’t think he gets the “no state” thing; there’s no mutable, shared state,
not no state at all.
Hallmarks of Functional Code
Functions are first-class objects
Functions are typically very small
Various Places that Functional Idioms Can Be Useful
He’s using templating as an example of how to use partials; that’s
interesting. I’m going to have to look into this.
Interesting point about Python 3’s crazy argument ordering options and
partials (how does partial application work with some of the wilder ones?)
Maybe use Python in a more functional style
Admits he doesn’t do this currently, so it’s aspirational
Use list comprehensions more
Isolating I/O looks like a good idea
Closures, decorators, and partials are a yes
Still doesn’t like recursion
Random observations by me
I didn’t realize iPython Notebook had presentation capabilities; I’m going to
have to play with that.
GNU Radio and Python (Andrew Henshaw)
According to Andrew, it’s more him showing off instead of demonstrating
GNU Radio is for signal processing
It’s a C++ kernel wrapped in beautiful Python goodness
Software-defined radio is apparently a big thing, lately
Apparently, hardware has gotten fast enough that software Digital
Signal Processing (DSP)
is fast enough to replace dedicated hardware, which brings all the
standard flexibility wins that software tends to provide over dedicated
There’s some crazy $20 dongle that can work as a receiver for just about
every frequency band you could want, and feed it into software-defined radio
Fancy: you can draw a dataflow diagram to define your
That’s pretty awesome: assuming I didn’t miss anything, he just ran
a touch-tone dialer program, in Python, generated from his fancy-pants
dataflow diagram. It was a 7.
The gremlins are out in full force (technical presentations are like crack
for these things); his GUI example with a volume slider suddenly stopped
working despite working earlier.
My computer’s battery is now toast, so you’ll have to talk to him if you want
the details of the presentation/demo.