[julia-users] Python Callbacks using pyjulia

[Frank Hellmann]

Hello,
I am evaluating using Julia for implementing some algorithms we want to 
use. As a first usecase we wanted to try using the DASSL solver in julia on 
a python function. Unfortunately we get the error below. I don't really 
know how to start debugging this problem, any pointers would be deeply 
appreciated.

Best,
Frank

======

$ python dassl-from-python.py 

Traceback (most recent call last):
  File "dassl-from-python.py", line 8, in <module>
    r = j.dasslSolve(f, 1., [0., 10.])
RuntimeError: Julia exception: 
MethodError(DASSL.#dasslStep,(Any[:dy0,[0.0],:tstop,10.0],DASSL.dasslStep,PyObject
 
<function <lambda> at 0x101a69500>,[1.0],0.0))

import julia

j = julia.Julia()

j.using("DASSL")

f = lambda t, x, dx: x - dx
r = j.dasslSolve(f, 1., [0., 10.])