What are Dict and List comprehensions?

Hi, I want to know What are Dict and List comprehensions

It is a more compact syntax for producing a list (or dict, or set, or generator). Rather than setting up an explicit loop, doing logic to modify some data, then appending that data to an object, the comprehension produces the object in a single line of code.

The documentation references comprehensions in the Datastructures section and in the New in 2.0 section.

There are many guides/tutorials on comprehensions outside the primary documentation.