如何在python中读取multiDicts(烧瓶) [英] How do read multiDicts in python (flask)
问题描述
我有一个行列表
[{'name':'John'，'email':'John@test.com'}，{'name':'Jenny'，'email':'Jenny@yahoo.com'}] 我正在使用ajax从javascript发送它们.我不确定如何在python/flask中读取它.我可以在request.form中看到数据.当我尝试访问它时，我遇到了问题.
request.form [0] 没有给我 {'name':'John'，'email':'John@test.com'}
@ app.route('/listusers'，Methods = ['POST'])def do_listusers():对于request.form中的数据:打印(str(数据))打印(str(数据['名称'])) 数据本身是
[{'name':'John'，'email':'John@test.com'}，{'name':'Jenny'，'email':'Jenny@yahoo.com'}] 我期待着
{'name':'John'，'email':'John@test.com'} 数据[0] 也无效.
使用POST请求通过AJAX将JSON数据从模板发送到Flask:
- 将请求标头设置为内容类型JSON. 在发送到Flask之前先
-
JSON.stringify数据.
在Flask中接收JSON数据:
- 使用
request.get_json().可以在当用户单击
Send Data按钮时，它将JSON数据从模板发送到Flask应用.在Flask应用程序中，将处理数据并将处理后的数据返回到模板.I have a list of rows
[ {'name': 'John', 'email': 'John@test.com'}, {'name': 'Jenny', 'email': 'Jenny@yahoo.com'} ]I am using ajax to send them from javascript. I am not sure how to read it in python/flask. I can see the data in request.form. When I try to access it, I am running into issues.
request.form[0]does not give me{'name': 'John', 'email':'John@test.com'}@app.route('/listusers', methods=['POST']) def do_listusers(): for data in request.form: print(str(data)) print(str(data['name']))data itself is
[ {'name': 'John', 'email': 'John@test.com'}, {'name': 'Jenny', 'email': 'Jenny@yahoo.com'} ]I was expecting
{'name': 'John', 'email': 'John@test.com'}Also
data[0]is not valid as well.解决方案Send JSON data from Template to Flask using AJAX using POST request:
- Set request header to content type JSON.
JSON.stringifythe data before sending to Flask.
Receive JSON data in Flask:
- Use
request.get_json(). Details of this method can be found in official documentation.
I am showing an example of sending JSON data to Flask, processing in Flask and returning the processed data from Flask to template.
Initially the JSON data contains an array of objects:
[ {"name": "John", "email": "John@test.com"}, {"name": "Jenny", "email": "Jenny@yahoo.com"} ]Suppose we need to modify this data to have an
idattribute.Folder structure:
├── app.py └── templates └── index.htmlapp.py:from flask import Flask, request, jsonify, render_template app = Flask(__name__) def get_processed_data(data): for i,item in enumerate(data): data[i]["id"] = i return data @app.route("/", methods=['GET', 'POST']) def login(): if request.method == "POST": request_data = request.get_json() processed_data = get_processed_data(request_data) return jsonify(processed_data), 200 return render_template("index.html") if __name__ == '__main__': app.run(host='0.0.0.0', port=5000)index.html:<html> <head> <title>Post JSON data using AJAX</title> </head> <body> <h2> POST JSON data using AJAX </h2> <button id="send_data_btn">Send Data</button> <script> var send_data_btn = document.getElementById("send_data_btn"); function postData() { var request_url = "http://127.0.0.1:5000/"; var request_payload = [ {"name": "John", "email": "John@test.com"}, {"name": "Jenny", "email": "Jenny@yahoo.com"} ]; var xhr = window.XMLHttpRequest ? new XMLHttpRequest() : new ActiveXObject("Microsoft.XMLHTTP"); xhr.open('POST', request_url); xhr.onreadystatechange = function() { if (xhr.readyState==4 && xhr.status==200) { var processed_data = JSON.parse(xhr.responseText); console.log(processed_data); } }; xhr.setRequestHeader("Content-type", "application/json"); xhr.send(JSON.stringify(request_payload)); } send_data_btn.addEventListener("click", postData); </script> </body> </html>Output:
When user clicks on
Send Databutton, it sends the JSON data from template to Flask app. In Flask app, the data is processed and returns the processed data to template.这篇关于如何在python中读取multiDicts(烧瓶)的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
