Adding dev@ I don't believe we have APIs yet for plugging in user-defined Array subtypes. I assume you've read
http://arrow.apache.org/docs/python/extending_types.html#defining-extension-types-user-defined-types There may be some JIRA issues already about this (defining subclasses of pa.Array with custom behavior) -- since Joris has been working on this I'm interested in more comments On Mon, Oct 28, 2019 at 3:56 PM Justin Polchlopek <jpolchlo...@azavea.com> wrote: > > Hi! > > I've been working through understanding extension types in Arrow. It's a > great feature, and I've had no problems getting things working in Java/Scala; > however, Python has been a bit of a different story. Not that I am unable to > create and register extension types in Python, but rather that I can't seem > to recreate the functionality provided by the Java API's ExtensionTypeVector > class. > > In Java, ExtensionType::getNewVector() provides a clear pathway from the > registered type to output a vector in something other than the underlying > vector type, and I am at a loss for how to get this same functionality in > Python. Am I missing something? > > Thanks for any hints. > -Justin
