Since this is my first post in this forum, I wish to say hello to everybody and congratulate the developers for the work on pp.

I wish to solve in parallel systems of ordinary differential equations with the function 'odeint' from the 'integrate' module included in scipy.

However, I'm getting an error and I don't know what to do about it. Here's is an example:


import sys, time
import pp
import numpy, scipy
from scipy import integrate
from scipy.integrate import odeint

def func(x, t):
    return 1

ppservers = ()

if len(sys.argv) > 1:
    ncpus = int(sys.argv[1])
    job_server = pp.Server(ncpus, ppservers=ppservers)
else:
    job_server = pp.Server(ppservers=ppservers)

def salg(initial, instants):
   return odeint(func, initial, instants)

inputs = (1, 2, 3, 4, 5, 6, 7, 8)
jobs = []

for i in inputs:
   jobs.append(job_server.submit(salg, (i, [0,1,2,3,4,5],), (scipy.integrate.odeint, numpy.copy, numpy.array, func, ), ('numpy', 'scipy', 'scipy.integrate',)))
for job in jobs:
    print "Job", jobs.index(job), "is", job()




And this is the error I get:

>python -u "myPP1.py"
Traceback (most recent call last):
  File "myPP1.py", line 25, in <module>
    jobs.append(job_server.submit(salg, (i, [0,1,2,3,4,5],), (scipy.integrate.odeint, numpy.copy, numpy.array, func, ), ('numpy', 'scipy', 'scipy.integrate',)))
  File "/usr/lib/python2.5/site-packages/pp.py", line 406, in submit
    sfunc = self.__dumpsfunc((func, ) + depfuncs, modules)
  File "/usr/lib/python2.5/site-packages/pp.py", line 590, in __dumpsfunc
    sources = [self.__get_source(func) for func in funcs]
  File "/usr/lib/python2.5/site-packages/pp.py", line 668, in __get_source
    sourcelines = inspect.getsourcelines(func)[0]
  File "/usr/lib/python2.5/inspect.py", line 618, in getsourcelines
    lines, lnum = findsource(object)
  File "/usr/lib/python2.5/inspect.py", line 461, in findsource
    file = getsourcefile(object) or getfile(object)
  File "/usr/lib/python2.5/inspect.py", line 383, in getsourcefile
    filename = getfile(object)
  File "/usr/lib/python2.5/inspect.py", line 363, in getfile
    raise TypeError('arg is not a module, class, method, '
TypeError: arg is not a module, class, method, function, traceback, frame, or code object
>Exit code: 1


Can anybody help me to find what I am doing wrong? I'm using python 2.5.2, pp 1.5.6, scipy 0.6.0 and numpy 1.1.1.

Thanks a lot and regards.