Python 列表推导式 — 简洁的数据变换
Python 列表推导式语法、示例，以及何时优于循环。含 dict 与 set 推导式，适合数据处理脚本入门。
Python list comprehensionsPython 列表推导式Python 推导式Python 列表Python 教程
Python List Comprehension Syntax
列表推导式把「循环 + append」压缩成一行可读代码。它是 Python 惯用法，专业代码库中随处可见。
Why Python list comprehensions Matters
Comprehensions are idiomatic Python — they're faster to read and write than manual loops in data processing scripts.
[expr for x in iterable if condition] replaces three-line loops and is the pattern pandas-adjacent code uses constantly.
Python list comprehensions — Key Ideas You Must Know
- [expr for item in iterable]
- 加 if 过滤
- 嵌套推导式要克制
- dict 与 set 推导式
- 可读性优先于炫技
Python list comprehensions Code Example
PYTHON
squares = [x**2 for x in range(10)]
evens = [x for x in range(20) if x % 2 == 0]Practice Python list comprehensions with Free Lessons
在 Sturdee 学习列表与循环，然后把循环重构为推导式。
Tip: Free interactive lesson: /tutorials/python/python_lists — practice Python list comprehensions with runnable code on Sturdee.
Python 列表推导式 — FAQ
Frequently Asked Questions
推导式更快吗？+
通常比循环略快。主要收益是可读性。