[Pandas-dev] pandas February dev meeting notes

[Wes McKinney]

hi all,

Here are the rough notes about what was discussed on our recent public
dev meeting call. Please let us know if you have any questions or
comments for further discussion.

thanks!
Wes

Meeting notes
* Increasing worker capacity
   * Add 5 additional Travis CI builds for now
   * Add Circle CI for pandas-dev/pandas + plan to migrate Linux to CircleCI
* Obtaining dedicated bare metal hardware for pandas?
   * Could be shared amongst Dask, pandas, other projects
   * Wes volunteeer personal desktop for a nightly benchmark job,
upload benchmark results to a cloud postgres
   * Independently — write a generic job suitable for cron
* pandas 2.0
   * Preparation:
      * Separate test changes that will break (eg implicit dtype
changes), separation can also in place using marker
   * Development focus
      * Defining abstract data interface to make interacting with
out-of-process data and in-memory (including split / deferred
concatenated arrays)
      * Backwards compatibility layer to run NumPy functions
(__array__ / __array_finalize__)
      * Define implementation pattern for primitive analytics
functions (e.g. string manipulations, math, binary options)
      * Define memory management semantics (lifetime, sharing, copy-on-write)
   * Resourcing
      * Wes allocating some time in Q1 2017, will become more free in
Q2 and beyond
      * Website page for donations, listing project for which those
funds will be used.
* pandas 1.0 and current roadmap
   * What does stable mean?
      * Extreme conservatism around any changes that may impact
correctness / data semantics
      * Careful about changes that may make rebasing in pandas2 branch
more difficult
   * Deprecating panel
      * Consensus to deprecate Panel in 0.20.0
   * Removing .ix
      * Should we remove in 1.0?
      * Consensus seems to me to leave
DeprecationWarning/FutureWarning in 1.0, to be removed later in 2.0
* Handling of arguments in .agg:
https://github.com/pandas-dev/pandas/pull/14668 - Please have a look!
* Notebook 5.0 new tables
   * Joris will raise another issue with Jupyter to let them know how
this will affect pandas users
   * We can maybe issue a 0.19.3 with only the changes in
https://github.com/pandas-dev/pandas/issues/15379
* Next meeting
   * April 15 2017 time frame