Non-lazy evaluation version of map in Python3?

Question

I\'m trying to use map in Python3. Here\'s some code I\'m using:

import csv

data = [
    [1],
    [2],
    [3]
]

with open(\"output.csv\", \"w         


        

Answer 1

I would use a function to extract data from the iterable using something like this:

def rake(what, where=None):
    for i in what: 
        if where: where.append(i)

rake(map(writer.writerow, data))

If you know up front that you won't ever be collecting the output of the mapped function then you could simplify that to just:

for i in what: pass

But neither approach keeps excess data around unless you supply a list to put it in. And this approach should work equally well with map, filter, reduce, generators, range, and anything else that you could pass in to the rake function that for can iterate over.