[julia-users] Locality of "using"

[Peter Simon]

I thought that "using" within a module would not affect the name space of 
the enclosing module.  Could someone please explain why PyPlot is visible 
in Main after executing the lines below?

julia> isdefined(:PyPlot)
false


julia> module A
       using PyPlot
       end
INFO: Loading help data...


julia> current_module()
Main


julia> isdefined(:PyPlot)
true


Thanks,
--Peter