pickle_monstrosity.py

import copy_reg
import cPickle
import marshal
import types

def restorefunction(func_name, dump):
  return types.FunctionType(marshal.loads(dump), globals(), func_name)

def reducefunction(func):
  return (restorefunction, (func.func_name, marshal.dumps(func.func_code)))

copy_reg.constructor(restorefunction)
copy_reg.pickle(types.FunctionType, reducefunction)


# Example
def test(x):
  return x + 5

data = cPickle.dumps((test, test))

# In another Python environment
test, test2 = cPickle.loads(data)
test(5) == 10
test == test2