Core Python Programming

List Comprehensions

Remember how we used lambda functions along with map() and filter() to apply an operation to list members or to filter out list members based on criteria via a conditional expression? Well, list comprehensions simplify that task and improve performance by bypassing the necessity of using lambda along with functional programming built-in functions. List comprehensions allow you to provide an operation directly with an iteration over the original list sequence.

Let's take a look at the simpler list comprehension syntax first:

[ expression
					for
					iterative_var
					in
					sequence ]

The core of this statement is the for loop, which iterates over each item of sequence. The prefixed expression is applied for each member of the sequence, ...