Printing to main stdout in IPython Notebook from other parallel engines

问题

I am currently working in an IPython Notebook. I am running a function across different engines and would like to see what it prints.

Example:

def simple(a):
    print a+40;
    return a+20

A = range(20);
dview.map_sync(simple, A);

I would like this functionality because I'm running a function that runs for a long time and I am using print statements to keep track of its progress.

来源：https://stackoverflow.com/questions/16430827/printing-to-main-stdout-in-ipython-notebook-from-other-parallel-engines