Using python’s Pool.map() with many arguments

One thing that bugged me that took a while to find a solution was how to use multiple arguments in Python’s multiprocessing Pool.map(*) function.

def original_function(arg1, arg2, arg3, arg4)
    # do something with the four arguments
    return the_result

def function_wrapper(args):
    return original_function(*args)

def main()
    iterable = list()
    pool = mp.Pool()
    for parameter in parameters:
        iterable.append((arg1, arg2, arg3, parameter))
    results = list(pool.map(func=function_wrapper, iterable=iterable))

You are simply passing the tuple into a wrapper function and then unzipping the arguments inside the wrapper. Good enough for me.