[Baypiggies] Reminder: Introducing Type Annotations for Python TOMORROW (Thursday)

Glen Jarvis glen at glenjarvis.com
Wed Dec 14 14:30:50 EST 2016

Because of the holidays, this is a week earlier than normal. It's tomorrow:

Also, remember, we're at a new location:

LinkedIn, Yosemite Room
605 W. Maude Ave, Sunnyvale, CA

Please RSVP to make our lives easier:

Dropbox has several million lines of production code written in Python 2.7.
As a first step towards migrating to Python 3, as well as to generally make
our code more navigable, we are annotating our code with type annotations
using the PEP 484 standard and type-checking the annotated code with mypy.
In this talk we will discuss lessons learned and show how you too can start
type-checking your legacy Python 2.7 code, one file at a time. We will also
describe some of the many improvements we’ve made to mypy in the process,
as well as some other tools that come in handy.
Mypy is an open-source type-checker for Python. It was originally created
by one of the speakers, Jukka Lehtosalo, in support of his PhD thesis,
before he joined Dropbox. Mypy supports the PEP 484 standard for gradual
typing in Python. It supports Python 3.2 and higher, as well as Python 2.7
(using function signatures in type comments, per a recent update to PEP

Guido van Rossum is the author of the Python programming language. He
continues to serve as the "Benevolent Dictator For Life" (BDFL), meaning
that he continues to oversee the Python development process, making
decisions where necessary. He is currently employed by Dropbox.

(Based in UK and may not be able to attend)
Jukka Lehtosalo created mypy, an optional static type checker for Python,
while working on his PhD at the University of Cambridge. He currently works
at Dropbox and continues to lead the development of mypy.

Greg Price is an engineer at Dropbox. Previously he worked at Quora and
helped Ksplice make rebooting obsolete.

David Fisher works full time on mypy (the PEP 484 static type checker) at
Dropbox. He enjoys learning esoteric languages in his spare time.
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