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

list(map(lambda x: do(x),y))

will trigger an evaluation and stay in the nice, readable semantics that improve human runtime efficiency beyond the "for-loop (which is a map itself) plus new paragraph scope transition" semantics. ¯\(ツ)/¯

Note that there is no reason not to call it semantic sugar during an initial draft (in fact, for loops are usually easier since they are more modular: you may not know what your code needs to do during your first try at a problem), but when you are productionalizing or reverse engineering code that is in a working state, increasing semantic efficiency (or even merely rewriting in equivalently nice code) is a strong factor of success.

Anyhow, if you want to flush the map stack, trigger it with a list type conversion.

---

So:

import csv

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

with open("output.csv", "w") as f:
    writer = csv.writer(f)
    list(map(writer.writerow, data))