In Dask Bag, you can pluck values from each element in the bag using the pluck() method. The pluck() method returns a new bag with only the specified values from each element in the original bag.
For example, if you have a Dask Bag of dictionaries representing products, and you want to extract the prices of each product, you can use the pluck() method as follows:
import dask.bag as db# Assume we have a Dask Bag called 'products_bag'prices_bag = products_bag.pluck('price') |
In this example, the pluck() method returns a new Dask Bag called prices_bag that contains only the "price" values from each dictionary in the original products_bag.
You can also use pluck() to extract values from nested dictionaries. For example, if each product in the products_bag has a dictionary of attributes, and you want to extract the value of the "color" attribute for each product, you can use pluck() with a nested key:
colors_bag = products_bag.pluck(['attributes', 'color']) |
This would return a new Dask Bag called colors_bag that contains only the "color" values from the "attributes" dictionaries for each product in the original products_bag.
Once you have a new bag with the desired values, you can perform further operations on it, such as filtering or aggregating the values.