Decorator to upgrade methods to cloudpickle

This is a suggestion/feature request. The idea is to provide a decorator to upgrade any callable to use cloudpickle by default. This comes handy for example to use a locally defined function via any standard executor.

The syntax would be something like:

from cloudpickle import inline

@inline
def myfunc(...):
...

executor.submit(myfunc)

Below is some sample code to achieve the equivalent:

import pickle
import cloudpickle

class InlineWrapper:
"""
Function wrapper with __reduce__ based on cloudpickle.dumps
Makes the callable pickleable even if defined in __main__
"""

def __init__(self, func):
self.func = func

def __reduce__(self):
data = cloudpickle.dumps(self.func)
return pickle.loads, (data,)

def __call__(self, *args, **kwargs):
return self.func(*args, **kwargs)

def inline(func):
""" Decorator for InlineWrapper """

return InlineWrapper(func)