代码片段库

经过测试、可直接复制的 Python、Flask、JavaScript、SQL、HTML、CSS 和 Bash 代码片段，都可以在代码游乐场中打开。

只显示此浏览器中收藏的代码片段

3 个代码片段

python

Read a JSON file with clear errors

Load a JSON file and get a readable message when it is missing or malformed.

import json
from pathlib import Path


def load_json(path: str | Path) -> dict:

beginner #json#files#errors

flask

Safe file upload

Check the extension, size and filename before saving an upload.

import os
import uuid
from flask import request, abort
from werkzeug.utils import secure_filename

intermediate #uploads#security#files

python

Read and write CSV files

Read rows as dicts and write a filtered copy with csv.DictWriter.

import csv
import io

source = io.StringIO("name,score\nada,91\nlinus,78\ngrace,88\n")   # use open("in.csv") for a file
rows = [row for row in csv.DictReader(source) if int(row["score"]) >= 80]

beginner #csv#files#data

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代码片段库

Read a JSON file with clear errors

Safe file upload

Read and write CSV files