Python Flask 加载本地 json
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Flask load local json
提问by kOssi
I am struggling with how to load a local json in flask.
我正在努力研究如何在烧瓶中加载本地 json。
from flask import Flask, render_template, json, url_for
def taiwan():
json_data = open(url_for('static', filename="data/taiwan.json"))
data = json.load(json_data)
return render_template('taiwan.jade', data=data)
This raises an IOError: No such file or directory: '/static/css/taiwan.json'. But it still exists.
这会引发 IOError: No such file or directory: '/static/css/taiwan.json'。但它仍然存在。
Any suggestions
有什么建议
采纳答案by kOssi
I ended up with this:
我结束了这个：
import os
from flask import Flask, render_template, url_for, json
def showjson():
SITE_ROOT = os.path.realpath(os.path.dirname(__file__))
json_url = os.path.join(SITE_ROOT, "static/data", "taiwan.json")
data = json.load(open(json_url))
return render_template('showjson.jade', data=data)
回答by Krzysztof Rosiński
You should use the path of Your static dir, to obtain the file, url_for gets the URI abs path, not fs path. Try this
您应该使用您的静态目录的路径来获取文件， url_for 获取 URI abs 路径，而不是 fs 路径。尝试这个
json_data = open(os.path.join(your_static_dir, "data", "taiwan.json"), "r")
回答by cowgill
Dynamically get your static directory and includes a datasub-dir which contains the .jsonfile to load.
动态获取您的静态目录并包含一个data包含.json要加载的文件的子目录。
import os
from flask import Flask, render_template, json, current_app as app
# static/data/test_data.json
filename = os.path.join(app.static_folder, 'data', 'test_data.json')
with open(filename) as test_file:
data = json.load(test_file)
return render_template('index.html', data=data)
