[Solved] Printing the result of a map object in python that is not convertible to list

Question

map does a delayed execution, so when you cast the result to a list, the map is executed, which amounts in computing sum(1), sum(2), sum(-3) and sum(4)

Any of those will fail because sum takes something like a list (an iterable object) in input. You pass integers which are not iterable, hence the error message.

As suggested in the comments, you want to do a simple sum(x).

Accepted Answer

map does a delayed execution, so when you cast the result to a list, the map is executed, which amounts in computing sum(1), sum(2), sum(-3) and sum(4)

Any of those will fail because sum takes something like a list (an iterable object) in input. You pass integers which are not iterable, hence the error message.

As suggested in the comments, you want to do a simple sum(x).