The Beta API has an execution date and RPC Framework is but a distant
memory.
This test is flaky with Python 3.5 on Windows! Some mysteries will just
have to remain unsolved...
Currently, `warning: sdist: standard file not found` warning is always
printed when creating source distribution for gRPC python reflection
package. This should stop that.
The thread that watches connectivity on the channel might not
pick up that the server has gone away before the request is
dispatched, and return UNAVAILABLE instead of reconnecting
prior to sending the request. The fundamental solution would
basically be enabling retries in C-core. For now, we opt to
sleep a second to deflake this particular test case.
A gRPC Python client interceptor is passed an instance of a class
that implements the ClientCallDetails interface. The interceptor
can choose to create its own object that implements the interface,
and pass it back to the continuation invoked by the interceptor.
To make it easy to add additional attributes to call details,
without breaking user code that hardcode the attributes required
by the interface, instead of interospecting the object passed
to the interceptor at runtime, and to ease authorship of
interceptors that want to keep some attributes intact and not
care about them, we relax the requirements on the object that
is expected to get passed by the interceptor and let the user
omit some attributes. Omitted attributes will be replaced
by the original value of the attribute given to the interceptor.