How to pickle and repickle a scipy vode ode solver, see [stackoverflow question](https://stackoverflow.com/questions/48096655/scipy-pickle-an-ode-solver-instance)

continue.py

import scipy.integrate
import dill

## Restart the ode solver
file_name='ode_instance.pkl'
with open(file_name, "r") as ode_file:
    ode_solver = dill.load(ode_file)

ode_solver.integrate(2)
print ode_solver.t, ode_solver.y

initialize.py

import scipy.integrate
import dill

# Solve a simple ode up to some time t
rhs= lambda t, y: -y
ode_solver = scipy.integrate.ode(rhs).set_integrator('vode')
ode_solver.set_initial_value(1)
ode_solver.integrate(1)
print ode_solver.t, ode_solver.y

## Stop solving and persist ode solver to a file
file_name='ode_instance.pkl'
with open(file_name, "w") as ode_file:
    dill.dump(ode_solver, ode_file)