Python 相關

Python Programming Language

函式 (function) 和 方法 (method)

requirements.txt

from … import * 

Pause (Press the <ENTER> key to continue…)

Bitwise Operation

多重賦值 (Multiple Assignment) 時的計算順序

⭐️ Assignment Expressions 「:=」（賦值後執行 Expressions）

⭐️ assert 斷言

運算子優先序 Operator Precedence

Chaining Comparison Operators (a > b and b > c → a > b > c) 

Variable Scope: global, nonlocal

UnboundLocalError (Variable Scope inside a Function)

判斷是否為 空(None) (0 為 False)

any(), all()

Membership Test Operations (in / not in)

match-case: Python 中的 Switch-case

do-while Loop in Python

list, set, dict, collections (deque, defaultdict, Counter)

Enumerate a Multi-Dimensional List

COUNTIF in Python

heapq (優先權佇列 Priority Queue)

List Comprehensions [ … for … in … ]

逆序存取 (for e in lst[::-1])

複製物件 (lst_b = lst_a[:])

f-string (String Formatting)

串接字串 “…”.join()

填充字串長度 rjust()

str 先比較 len 再比較 Lexicographic Order 

正則表達式 Regular Expression (re)

計算某元素出現的次數 count()

iterator & generator

Unpacking 解包, *identifier / **identifier

lambda parameter: expression

functools: @lru_cache…

使用 signal 和 decorator 讓函式執行超過時限時中斷

測量片段代碼執行所需時間

Error/Exception Processing (try statement; try-except)

快速套用 try-except 到 method 上 (使用 functools)

程式碼/字串 太長時怎麼換行？

Press the <ENTER> key to continue…

Read All Lines in Text File by Loop (with … as …:)

Sorting 排序

⭐️ Sort by Multiple Keys

⭐️ Python 中的 Binary Search (bisect, insort)

取得 Current Directory/Folder

math: inf, prod(), floor(), ceil(), isqrt()…

asyncio (並行計算)

⭐️ datetime

os

遍歷資料夾 (os.walk(), os.scandir(), os.listdir())

Get the Root Directory/Drive

Web Crawler

Scrapy

requests

Last Updated on 2025/04/11 by A1go