Fix PyEventPort for changes in upstream interface
Fix PyEventPort for changes in upstream interface

rcrowder/pycapnp,SymbiFlow/pycapnp,tempbottle/pycapnp,tempbottle/pycapnp,jparyani/pycapnp,SymbiFlow/pycapnp,tempbottle/pycapnp,jparyani/pycapnp,rcrowder/pycapnp,rcrowder/pycapnp,rcrowder/pycapnp,SymbiFlow/pycapnp,tempbottle/pycapnp,jparyani/pycapnp,jparyani/pycapnp,SymbiFlow/pycapnp