empty stream

I'm trying to plot a single trace as a section using (plotting a
background of many traces, and then one trace as a different color).

However it looks like scaling does not work properly if you only pass
a single trace (or stream with one trace) to plot(type='section').

As a work around I'll pass it two traces in a stream, but I want to
start from an empty stream.

Anyone know how to create an empty stream? Or similarly, copy a single
trace from a stream, but make sure the returned object is a stream
with one trace and not a trace? (you cant append a trace to a trace,
but you can append a trace to a stream...)



nevermind about the blank stream, for some reason calling the class
without an argument wasnt working, but fixed it!