Getting Flask JSON response as an HTML Table?

Question

I was wondering if there might be a way to return my Flask app’s response as an HTML table populated by the JSON response key value pairs instead of merely having the entire JSON string on the HTML page?

Below is the code that i have:

from flask import Flask
import json, pandas as pd

app = Flask(__name__)

@app.route("/GetData")
def GetData():
    df = pd.read_csv("DemoData.csv")
    temp = df.to_dict('records')
    data = [dict(i) for i in temp]
    return json.dumps(data, indent=4)


if __name__ == "__main__":
    app.run(host='127.0.0.1', port=8000)

The code above gives the following response: (URL: “http://127.0.0.1:8000/GetData“)

Now what i want is to get the response converted into a table upon entering the aforementioned URL kinda like the CSV file.

Here is a sample of my CSV file:

Employee Name,City,Country,Project Assigned
Carl Elias,Passadena,USA,Optical Character Recognition
Amanda Jean Spears,Denver,USA,Linux Kali Security Mods
John Reese,Athens,Greece,Inertial Navigation System
Leslie James,Heartfordshire,United Kingdom,Relay Transmission Optimisation Mods
Patrick Sullivan,London,United Kingdom,Fraud Checking System
Julia Reginald Roberts,Sao Paolo,Brazil,User Authentication System
Michael Bucannan,San Franscisco,USA,Analytics Automation Tool
Jeanine Fitzgerald,Ontario,Canada,CopyChecker
Patricia Sullly,Shanghai,China,Automated Milling Tool

Asked By: Carl

||

Source

Answer 1

You should write a template for it like Alex Hall said.
It won’t be hardcoded if you loop through column names.
Firstly, you should import render_template.

from flask import Flask, render_template

Then, you need to change your request handler. This allows to render a template ‘record.html’ with injecting two variables, records and colnames.

@app.route("/GetData")
def GetData():
    df = pd.read_csv("DemoData.csv")
    temp = df.to_dict('records')
    columnNames = df.columns.values
    return render_template('record.html', records=temp, colnames=columnNames)

Check this rendering template guide. You need to create a new folder ‘templates/’, and you can find ‘templates/record.html’ below:

<table border="1">
    <thead>
        <tr>
            {% for col in colnames %}
            <th>{{ col }}</th>
            {% endfor %}
        </tr>
    </thead>
    <tbody>
        {% for record in records %}
        <tr>
            {% for col in colnames %}
            <td>{{ record[col] }}</td>
            {% endfor %}
        </tr>
        {% endfor %}
    </tbody>
</table>

To do this dynamically, firstly you should iterate through column names. As Alex Hall said, dict is not ordered so when iterating records, you should also iterate column names, so you can write them in right order.

Answered By: codebender

Answer 2

A really simple hack is read data into a pandas dataframe first, then call .to_html:

import pandas as pd
from flask import Flask, render_template

@app.route("/table-page", methods=['GET'])
def table():

    data_dic = {
        'id': [100, 101, 102],
        'color': ['red', 'blue', 'red']}
    columns = ['id', 'color']
    index = ['a', 'b', 'c']

    df = pd.DataFrame(data_dic, columns=columns, index=index)
    table = df.to_html(index=False)
    
    return render_template(
        "at-leaderboard.html",
        table=table)

Then simply pop the HTML into your template:

<html>
  <body>
    <div>
      {{ table | safe }}
    </div>
  </body>
</html>

Answered By: Zaffer

Answer 3

To convert JSON data into HTML table that can be displayed on a web page I followed these steps:

Load .json file into a python object using json.load
Convert python object to HTML table using json2html.convert
Render data_table in index.html as

 <div id="content-database">
        {{ data_table | safe }}
 </div>

This avoids writing any for-loops in HTML code.

Answered By: nae9on

Getting Flask JSON response as an HTML Table?

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