(feature) Refer to a function defined in another module

[ygravrand]

When testing Multyvac during Pycon workshops, we ran into a problem when a function is defined in another module:

From the main example in cloudpipe, move 'add' function into a 'test' module and then:

from test import add
print 'Locally:', add(2,3)

job_id = multyvac.submit(add, 2, 3)
job = multyvac.get(job_id)
print 'Remotely:', job.get_result()

Results:

Locally: 2 + 3 = 5
5
Remotely:
Traceback (most recent call last):
  File "simpletest2.py", line 13, in <module>
    print 'Remotely:', job.get_result()
  File "$$edited$$/multyvac-fork/multyvac/job.py", line 105, in get_result
    raise e
multyvac.job.JobError: Traceback (most recent call last):
  File "/home/rho/anaconda/lib/python2.7/runpy.py", line 162, in _run_module_as_main
    "__main__", fname, loader, pkg_name)
  File "/home/rho/anaconda/lib/python2.7/runpy.py", line 72, in _run_code
    exec code in run_globals
  File "/home/rho/anaconda/lib/python2.7/site-packages/multyvacinit/pybootstrap.py", line 10, in <module>
    (f, args, kwargs) = pickle.load(sys.stdin)
  File "/home/rho/anaconda/lib/python2.7/pickle.py", line 1378, in load
    return Unpickler(file).load()
  File "/home/rho/anaconda/lib/python2.7/pickle.py", line 858, in load
    dispatch[key](self)
  File "/home/rho/anaconda/lib/python2.7/pickle.py", line 1090, in load_global
    klass = self.find_class(module, name)
  File "/home/rho/anaconda/lib/python2.7/pickle.py", line 1124, in find_class
    __import__(module)
ImportError: No module named test

Need to investigate in cloudpickle.