如何在 Python Flask 中读取文件

Question

我想实现一个简单的搜索功能，当用户在框中输入文本时，它将通过json file [large.js]以查看是否有任何匹配的记录。如果是，将显示结果。

问题是当我运行py文件时，出现错误No such file or directory "large"

任何想法都会很棒。谢谢

下面是python代码[application.py]

from flask import Flask, render_template, request, jsonify
app = Flask(__name__)
WORDS = []
with open("large", "r") as file:
    for line in file.readlines():
        WORDS.append(line.rstrip()) 
@app.route("/")
def index():
    return render_template("index.html")

@app.route("/search")
def search():
    q = request.args.get("q")
    words = [word for word in WORDS if word.startswith(q)]
    return jsonify(words)

下面是 HTML 代码 [templates/index.html]

<input type="text">
<ul></ul>
<script src ="large.js"></script>
<script>
let input = document.querySelector("input")
input.onkeyup = function (){
let html = "";
if (input.value){
for (word of WORDS){
if (word.startsWith(input.value)){
html += "<li>" + word +"</li>";
}} }
document.querySelector("ul").innerHTML = html;
};
</script>

包含 json 的large.js 文件

let WORDS = [
"a",
"abandon",
"abandoned",
"ability",
"able"]

Answer 1

1. 创建一个名为 的文件夹static，然后在该static文件夹内创建另一个名为 的文件夹js并将large.js文件放入其中

2. 在你templates/index.html把这个改成 <script src ="large.js"></script> 这个 <script src ="{{ url_for('static', filename='js/large.js') }}"></script>

之后您的应用程序结构应该类似于

然后在您的代码中尝试类似下面的内容，让我知道会发生什么

import os
from flask import Flask, render_template, request, jsonify

basedir = os.path.abspath(os.path.dirname(__file__))
data_file = os.path.join(basedir, 'static/js/large.js')

WORDS = []
with open(data_file, "r") as file:
    for line in file.readlines():
        WORDS.append(line.rstrip())

app = Flask(__name__)

@app.route("/")
def index():
    return render_template("index.html")

@app.route("/search")
def search():
    q = request.args.get("q")
    words = [word for word in WORDS if word.startswith(q)]
    return jsonify(words)