So here is what I did: in Julia v0.4.6:
julia> Pkg.pin("PyCall", v"1.3.0")
julia> Pkg.build("PyCall")
removed core.py in /usr/local/lib/python2.7/dist-packages/julia/
created a new core.py containing these contents
<https://github.com/benmoran/pyjulia/blob/master/julia/core.py>.
running, in python:
>>> import julia
>>> julia.Julia()
works fine.
