coding-mentor-agent/kb/python-course-kb-practical-python/wiki/exercises/2-19-list-comprehensions.md

id, source_exercise_id, title, section, source_path, source_repo, source_commit, student_visible_solution, has_private_solution, skip

id	source_exercise_id	title	section	source_path	source_repo	source_commit	student_visible_solution	has_private_solution	skip
practical-python-2.19	2.19	List comprehensions	2.6 List Comprehensions	02_Working_with_data/06_List_comprehension.md	https://github.com/dabeaz-course/practical-python	93dca856b41c61a0a0f85ae334116e4c125629ea	false	false	false

Exercise 2.19: List comprehensions

Source: Practical Python Programming, 02_Working_with_data/06_List_comprehension.md.

Exercise 2.19: List comprehensions

Try a few simple list comprehensions just to become familiar with the syntax.

>>> nums = [1,2,3,4]
>>> squares = [ x * x for x in nums ]
>>> squares
[1, 4, 9, 16]
>>> twice = [ 2 * x for x in nums if x > 2 ]
>>> twice
[6, 8]
>>>

Notice how the list comprehensions are creating a new list with the data suitably transformed or filtered.

关联来源

• summaries/06_List_comprehension