\u57fa\u672c\u6587\u4ef6\u8bfb\u5199<\/p>\n\n\n\n
with open('file.txt', 'w') as f:\n f.write('Hello, World!')\nwith open('file.txt', 'r') as f:\n content = f.read()<\/code><\/pre>\n\n\n\n\u8def\u5f84\u5904\u7406<\/p>\n\n\n\n
import os\nfrom pathlib import Path\nfile_path = os.path.join('folder', 'file.txt')\npath = Path('folder') \/ 'file.txt' # \u73b0\u4ee3\u5199\u6cd5<\/code><\/pre>\n\n\n\n\u538b\u7f29 \/ \u89e3\u538b\u7f29\u6587\u4ef6<\/p>\n\n\n\n
import zipfile\nwith zipfile.ZipFile('archive.zip', 'w') as zipf:\n zipf.write('file.txt')\nwith zipfile.ZipFile('archive.zip', 'r') as zipf:\n zipf.extractall('extracted')<\/code><\/pre>\n\n\n\n\u5217\u8868\u63a8\u5bfc\u5f0f<\/p>\n\n\n\n
squares = [x**2 for x in range(10)]\neven_squares = [x**2 for x in range(10) if x % 2 == 0]<\/code><\/pre>\n\n\n\n\u96c6\u5408\u64cd\u4f5c<\/p>\n\n\n\n
a = {1, 2, 3, 4}\nb = {3, 4, 5, 6}\nprint(a.union(b)) # \u5e76\u96c6: {1, 2, 3, 4, 5, 6}\nprint(a.intersection(b)) # \u4ea4\u96c6: {3, 4}<\/code><\/pre>\n\n\n\n\u5b57\u7b26\u4e32\u683c\u5f0f\u5316<\/p>\n\n\n\n
name, age = \"Alice\", 30\nprint(f\"{name}\u4eca\u5e74{age}\u5c81\") # f-string\nprint(\"{0}\u4eca\u5e74{1}\u5c81\".format(name, age))<\/code><\/pre>\n\n\n\n\u6b63\u5219\u8868\u8fbe\u5f0f<\/p>\n\n\n\n
import re\ntext = \"\u8054\u7cfb\u65b9\u5f0f: email@example.com \u7535\u8bdd123-4567\"\nemails = re.findall(r'[\\w._%+-]+@[\\w.-]+\\.[a-zA-Z]{2,}', text)\nphones = re.findall(r'\\d{3}-\\d{4}', text)<\/code><\/pre>\n\n\n\n\u57fa\u672c\u56fe\u50cf\u64cd\u4f5c<\/p>\n\n\n\n
from PIL import Image, ImageFilter, ImageDraw\nimg = Image.open('example.jpg')\nprint(f\"\u5927\u5c0f: {img.size}, \u683c\u5f0f: {img.format}\")<\/code><\/pre>\n\n\n\n\u56fe\u50cf\u5904\u7406<\/p>\n\n\n\n
resized = img.resize((300, 200))\nrotated = img.rotate(45)\nblurred = img.filter(ImageFilter.BLUR)\ncropped = img.crop((100, 100, 400, 400)) # (left, top, right, bottom)<\/code><\/pre>\n\n\n\n\u7ed8\u56fe\u4e0e\u4fdd\u5b58<\/p>\n\n\n\n
draw = ImageDraw.Draw(img)\ndraw.rectangle((50, 50, 150, 150), outline=\"red\")\ndraw.text((10, 10), \"Hello\", fill=\"white\")\n# \u4fdd\u5b58\u56fe\u50cf\nimg.save('modified.jpg', quality=95)<\/code><\/pre>\n\n\n\n\u73af\u5883\u53d8\u91cf\u64cd\u4f5c<\/p>\n\n\n\n
import os\nfrom dotenv import load_dotenv\nload_dotenv() # \u52a0\u8f7d.env\u6587\u4ef6\napi_key = os.getenv('API_KEY', '\u9ed8\u8ba4\u503c')\nos.environ['DEBUG'] = 'True' # \u8bbe\u7f6e\u73af\u5883\u53d8\u91cf<\/code><\/pre>\n\n\n\n\u547d\u4ee4\u884c\u53c2\u6570<\/p>\n\n\n\n
import argparse\nparser = argparse.ArgumentParser(description='\u793a\u4f8b\u7a0b\u5e8f')\nparser.add_argument('filename', help='\u8f93\u5165\u6587\u4ef6')\nparser.add_argument('-v', '--verbose', action='store_true')\nargs = parser.parse_args()<\/code><\/pre>\n\n\n\n\u5b50\u8fdb\u7a0b\u7ba1\u7406<\/p>\n\n\n\n
import subprocess\nresult = subprocess.run(['ls', '-l'], capture_output=True, text=True)\nprint(result.stdout)<\/code><\/pre>\n\n\n\n\u5355\u5143\u6d4b\u8bd5<\/p>\n\n\n\n
import unittest\ndef add(a, b): return a + b\nclass TestMath(unittest.TestCase):\n def test_add(self):\n self.assertEqual(add(1, 2), 3)\n self.assertEqual(add(-1, 1), 0)\n def test_add_fail(self):\n self.assertNotEqual(add(1, 1), 3)<\/code><\/pre>\n\n\n\n\u6027\u80fd\u6d4b\u91cf<\/p>\n\n\n\n
import time, timeit\ndef measure():\n start = time.time()\n result = sum(range(1000000))\n print(f\"\u8017\u65f6: {time.time() - start}\u79d2\")\n return result<\/code><\/pre>\n\n\n\n\u8fed\u4ee3\u5de5\u5177<\/p>\n\n\n\n
from itertools import cycle, chain, islice\ncolors = cycle(['\u7ea2', '\u7eff', '\u84dd']) # \u65e0\u9650\u5faa\u73af\nprint(next(colors), next(colors)) # \u7ea2 \u7eff\ncombined = chain([1, 2], [3, 4]) # \u8fde\u63a5\u591a\u4e2a\u53ef\u8fed\u4ee3\u5bf9\u8c61\nfirst_5 = islice(fibonacci(100), 5) # \u5207\u7247\u8fed\u4ee3\u5668<\/code><\/pre>\n\n\n\n\u521b\u5efa DataFrame<\/p>\n\n\n\n
import pandas as pd\nimport numpy as np\ndata = {\n 'Name': ['Alice', 'Bob', 'Charlie'],\n 'Age': [25, 30, 35],\n 'City': ['\u5317\u4eac', '\u4e0a\u6d77', '\u5e7f\u5dde']\n}\ndf = pd.DataFrame(data)\ndf = pd.DataFrame(data)<\/code><\/pre>\n\n\n\n\u6570\u636e\u9009\u62e9\u4e0e\u8fc7\u6ee4<\/p>\n\n\n\n
names = df['Name'] # \u9009\u62e9\u5355\u5217\nsubset = df[['Name', 'Age']] # \u9009\u62e9\u591a\u5217\nyoung = df[df['Age'] < 30] # \u6761\u4ef6\u8fc7\u6ee4<\/code><\/pre>\n\n\n\n\u6570\u636e\u5206\u6790<\/p>\n\n\n\n
print(df.describe()) # \u7edf\u8ba1\u6458\u8981\ngrouped = df.groupby('City').mean() # \u5206\u7ec4\u7edf\u8ba1<\/code><\/pre>\n\n\n\n\u51fd\u6570\u7f13\u5b58\u63d0\u9ad8\u6027\u80fd<\/p>\n\n\n\n
from functools import lru_cache\n@lru_cache(maxsize=128)\ndef fibonacci(n):\n if n <= 1: return n\n return fibonacci(n-1) + fibonacci(n-2)<\/code><\/pre>\n\n\n\n\u547d\u540d\u5143\u7ec4<\/p>\n\n\n\n
from collections import namedtuple\nPoint = namedtuple('Point', ['x', 'y'])\np = Point(3, 4)\nprint(p.x, p.y) # \u901a\u8fc7\u540d\u79f0\u8bbf\u95ee\u5143\u7d20<\/code><\/pre>\n\n\n\n\u679a\u4e3e\u7c7b\u578b<\/p>\n\n\n\n
from enum import Enum, auto\nclass Color(Enum):\n RED = 1\n GREEN = 2\n BLUE = auto() # \u81ea\u52a8\u8d4b\u503c<\/code><\/pre>\n\n\n\n\u6570\u636e\u7c7b<\/p>\n\n\n\n
from dataclasses import dataclass\n@dataclass\nclass Product:\n name: str\n price: float\n quantity: int = 0\ndef total_cost(self) -> float:\n return self.price * self.quantity<\/code><\/pre>\n\n\n\nBase64 \u7f16\u7801<\/p>\n\n\n\n
import base64\nencoded = base64.b64encode(\"Hello\".encode())\ndecoded = base64.b64decode(encoded).decode()<\/code><\/pre>\n\n\n\n\u88c5\u9970\u5668<\/p>\n\n\n\n
import time\ndef timer(func):\n def wrapper(*args, **kwargs):\n start = time.time()\n result = func(*args, **kwargs)\n print(f\"\u8017\u65f6: {time.time() - start}\u79d2\")\n return result\n return wrapper<\/code><\/pre>\n\n\n\nLambda \u8868\u8fbe\u5f0f<\/p>\n\n\n\n
add = lambda x, y: x + y\nsorted_items = sorted(items, key=lambda x: x[1])<\/code><\/pre>\n\n\n\n\u53c2\u6570\u89e3\u5305<\/p>\n\n\n\n
def add(a, b, c): return a + b + c\nvalues = [1, 2, 3]\nprint(add(*values)) # \u89e3\u5305\u5217\u8868\nparams = {'a': 1, 'b': 2, 'c': 3}\nprint(add(**params)) # \u89e3\u5305\u5b57\u5178<\/code><\/pre>\n\n\n\nCSV \u5904\u7406<\/p>\n\n\n\n
import csv\nwith open('data.csv', 'w', newline='') as f:\n writer = csv.writer(f)\n writer.writerows([['Name', 'Age'], ['Alice', 25]])\nwith open('data.csv', 'r') as f:\n reader = csv.reader(f)\n for row in reader:\n print(row)<\/code><\/pre>\n\n\n\nXML \u5904\u7406<\/p>\n\n\n\n
import xml.etree.ElementTree as ET\nxml_str = '<root><item id=\"1\">\u503c<\/item><\/root>'\nroot = ET.fromstring(xml_str)\nvalue = root.find('item').text<\/code><\/pre>\n\n\n\nHTTP \u8bf7\u6c42<\/p>\n\n\n\n
import requests\nresponse = requests.get('https:\/\/api.example.com\/data')\nif response.status_code == 200:\n data = response.json()<\/code><\/pre>\n\n\n\n\u89e3\u6790\u7f51\u9875<\/p>\n\n\n\n
from bs4 import BeautifulSoup\nhtml = requests.get('https:\/\/example.com').text\nsoup = BeautifulSoup(html, 'html.parser')\ntitle = soup.title.text\nlinks = soup.find_all('a')<\/code><\/pre>\n\n\n\n\u5c5e\u6027\u88c5\u9970\u5668<\/p>\n\n\n\n
class Temperature:\n def __init__(self, celsius):\n self._celsius = celsius\n @property\n def celsius(self):\n return self._celsius\n @property\n def fahrenheit(self):\n return self._celsius * 9\/5 + 32<\/code><\/pre>\n\n\n\n\u9b54\u672f\u65b9\u6cd5<\/p>\n\n\n\n
class Vector:\n def __init__(self, x, y):\n self.x, self.y = x, y\n def __add__(self, other):\n return Vector(self.x + other.x, self.y + other.y)\n def __str__(self):\n return f\"Vector({self.x}, {self.y})\"<\/code><\/pre>\n\n\n\n\u751f\u6210\u5668\u51fd\u6570<\/p>\n\n\n\n
def fibonacci(n):\n a, b = 0, 1\n for i in range(n):\n yield a\n a, b = b, a + b<\/code><\/pre>\n\n\n\n\u751f\u6210\u5668\u8868\u8fbe\u5f0f<\/p>\n\n\n\n
squares = (x**2 for x in range(10)) # \u6bd4\u5217\u8868\u63a8\u5bfc\u7701\u5185\u5b58<\/code><\/pre>\n\n\n\n\u83b7\u53d6\u548c\u683c\u5f0f\u5316\u5f53\u524d\u65f6\u95f4<\/p>\n\n\n\n
from datetime import datetime, timedelta\nnow = datetime.now()\nformatted = now.strftime(\"%Y-%m-%d %H:%M:%S\")\nprint(f\"\u5f53\u524d\u65f6\u95f4: {formatted}\")<\/code><\/pre>\n\n\n\n\u65e5\u671f\u8ba1\u7b97<\/p>\n\n\n\n
tomorrow = now + timedelta(days=1)\nlast_week = now - timedelta(weeks=1)\ntime_diff = tomorrow - now # \u8ba1\u7b97\u65f6\u95f4\u5dee<\/code><\/pre>\n\n\n\n\u89e3\u6790\u65e5\u671f\u5b57\u7b26\u4e32<\/p>\n\n\n\n
date_str = \"2023-01-15\"\ndate_obj = datetime.strptime(date_str, \"%Y-%m-%d\")<\/code><\/pre>\n\n\n\nJSON \u5904\u7406<\/p>\n\n\n\n
import json\ndata = {'name': 'Alice', 'age': 30}\njson_str = json.dumps(data, indent=2) # \u8f6c\u4e3aJSON\nparsed = json.loads(json_str) # \u89e3\u6790JSON<\/code><\/pre>\n\n\n\nURL \u89e3\u6790\u4e0e\u6784\u5efa<\/p>\n\n\n\n
from urllib.parse import urlparse, urlencode\nparsed_url = urlparse(\"https:\/\/example.com\/path\")\nparams = {\"name\": \"\u5f20\u4e09\", \"age\": 30}\nquery = urlencode(params)<\/code><\/pre>\n\n\n\n\u5f02\u5e38\u5904\u7406<\/p>\n\n\n\n
try:\n result = 10 \/ 0 # \u4f1a\u5f15\u53d1ZeroDivisionError\nexcept ZeroDivisionError as e:\n print(f\"\u6355\u83b7\u5230\u9519\u8bef: {e}\")\nexcept Exception as e:\n print(f\"\u6355\u83b7\u5176\u4ed6\u9519\u8bef: {e}\")\nfinally:\n print(\"\u59cb\u7ec8\u6267\u884c\u7684\u4ee3\u7801\")<\/code><\/pre>\n\n\n\n\u65e5\u5fd7\u8bb0\u5f55<\/p>\n\n\n\n
import logging\nlogging.basicConfig(\n level=logging.INFO,\n format='%(asctime)s - %(levelname)s - %(message)s',\n filename='app.log'\n)\nlogging.info('\u7a0b\u5e8f\u542f\u52a8')\nlogging.warning('\u8b66\u544a\u4fe1\u606f')\nlogging.error('\u9519\u8bef\u4fe1\u606f')<\/code><\/pre>\n\n\n\n\u591a\u7ebf\u7a0b<\/p>\n\n\n\n
import threading\ndef task(name):\n print(f\"\u7ebf\u7a0b{name}\u8fd0\u884c\u4e2d\")\nthreads = [threading.Thread(target=task, args=(i,)) for i in range(3)]\nfor t in threads:\n t.start()<\/code><\/pre>\n\n\n\n\u5f02\u6b65\u7f16\u7a0b<\/p>\n\n\n\n
import asyncio\nasync def say_hello(delay, name):\n await asyncio.sleep(delay)\n print(f\"Hello, {name}\")\nasync def main():\n await asyncio.gather(\n say_hello(1, \"Alice\"),\n say_hello(2, \"Bob\")\n )\n# asyncio.run(main()) # Python 3.7+<\/code><\/pre>\n\n\n\n\u8fde\u63a5\u548c\u521b\u5efa\u8868<\/p>\n\n\n\n
import sqlite3\n# \u8fde\u63a5\u6570\u636e\u5e93\nconn = sqlite3.connect('example.db')\ncursor = conn.cursor()\n# \u521b\u5efa\u8868\ncursor.execute('''\nCREATE TABLE IF NOT EXISTS users (\nid INTEGER PRIMARY KEY,\nname TEXT,\nage INTEGER\n)''')<\/code><\/pre>\n\n\n\n\u6570\u636e\u5e93\u64cd\u4f5c<\/p>\n\n\n\n
# \u63d2\u5165\u6570\u636e\ncursor.execute(\"INSERT INTO users VALUES (?, ?, ?)\", (1, 'Alice', 25))\nconn.commit()\n# \u67e5\u8be2\u6570\u636e\ncursor.execute(\"SELECT * FROM users WHERE age > ?\", (20,))\nfor row in cursor.fetchall():\n print(row)\nconn.close()<\/code><\/pre>\n\n\n\n\u57fa\u672c\u7c7b\u5b9a\u4e49<\/p>\n\n\n\n
class Person:\n def __init__(self, name, age):\n self.name = name\n self.age = age\n def greet(self):\n return f\"\u4f60\u597d\uff0c\u6211\u662f{self.name}\"<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"\u57fa\u672c\u6587\u4ef6\u8bfb\u5199 \u8def\u5f84\u5904\u7406 \u538b\u7f29 \/ \u89e3\u538b\u7f29\u6587\u4ef6 \u5217\u8868\u63a8\u5bfc\u5f0f \u96c6\u5408\u64cd\u4f5c \u5b57\u7b26\u4e32\u683c\u5f0f\u5316 \u6b63\u5219\u8868\u8fbe\u5f0f \u57fa\u672c\u56fe\u50cf\u64cd\u4f5c \u56fe […]<\/p>\n","protected":false},"author":1,"featured_media":90,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"advanced_seo_description":"","jetpack_seo_html_title":"","jetpack_seo_noindex":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[3],"tags":[],"class_list":["post-104","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-python"],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.linerroom.cn\/wp-content\/uploads\/2025\/11\/mmexportf886bff293f77e55b8fa446f190262f4_1762153164056.jpeg?fit=1280%2C1280&ssl=1","jetpack-related-posts":[],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.linerroom.cn\/index.php?rest_route=\/wp\/v2\/posts\/104","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.linerroom.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.linerroom.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.linerroom.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.linerroom.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=104"}],"version-history":[{"count":3,"href":"https:\/\/www.linerroom.cn\/index.php?rest_route=\/wp\/v2\/posts\/104\/revisions"}],"predecessor-version":[{"id":109,"href":"https:\/\/www.linerroom.cn\/index.php?rest_route=\/wp\/v2\/posts\/104\/revisions\/109"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.linerroom.cn\/index.php?rest_route=\/wp\/v2\/media\/90"}],"wp:attachment":[{"href":"https:\/\/www.linerroom.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=104"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.linerroom.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=104"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.linerroom.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}