What are the Most Pythonic Ways to Perform Element-Wise Addition of Lists?

Element-Wise Addition of Lists: Pythonic Approaches

In Python, performing element-wise addition of two lists can be achieved in several ways. Here are the most Pythonic methods:

1. map with operator.add:

This approach utilizes the map function combined with the operator.add function. map applies a specified function to each element in a list, while operator.add provides a way to perform addition.

from operator import add
list3 = list(map(add, list1, list2))

2. Zip with a List Comprehension:

Another option is to employ zip with a list comprehension. zip creates an iterator of tuples containing corresponding elements from the input lists. The list comprehension iterates over these tuples, applying sum to each element.

list3 = [sum(x) for x in zip(list1, list2)]

3. Performance Considerations:

For larger lists, performance can become a concern. The provided timing comparisons demonstrate that the map with operator.add approach offers the best performance, followed by zip with a list comprehension. For even larger lists, it's advisable to consider using NumPy's element_wise addition function for optimal efficiency.

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