Python Coalesce

Python Coalesce is a program designed to combine two or more lists in such a way that non-null values from the first list overwrite null values from the second list. It can also be used to select the first non-null value from a list of values.

Installation

To install Python Coalesce, run the following command in your terminal:

pip install python-coalesce

Usage

To use Python Coalesce, simply import the coalesce function and pass it one or more lists as arguments. For example:

from coalesce import coalesce

list1 = [1, None, 3, None, 5]
list2 = [None, 2, None, 4, None]
list3 = [None, None, None, None, 6]

result = coalesce(list1, list2, list3)

print(result)

This will output:

[1, 2, 3, 4, 5]

In this example, the coalesce function takes three lists as arguments: list1, list2, and list3. It combines these lists, giving precedence to non-null values from list1 and list2. The resulting list, result, contains the non-null values from all three lists.

Caveats

When using Python Coalesce, it's important to keep in mind that it only works with lists of the same length. If you pass in lists of different lengths, the function will raise a ValueError. It's also worth noting that the function returns a new list, rather than modifying the original lists.

Conclusion

Python Coalesce is a useful tool for combining lists and selecting non-null values. It's easy to use, and can help simplify your code when working with multiple lists. Give it a try in your next Python project!