[Python] Display FastAPI response (tuple) in an HTML textarea using Jinja2 Templates

Discussão em 'Python' iniciado por Stack, Fevereiro 28, 2025.

  1. Stack

    Stack Membro Participativo

    Here is my FastAPI backend:

    main.py

    from typing import Optional
    from fastapi import FastAPI, Request, Form
    from fastapi.templating import Jinja2Templates

    app = FastAPI()
    templates = Jinja2Templates(directory='./')

    @app.get("/")
    def index():
    return "Hello World"

    @app.get("/item/{text}")
    def get_item(text: str):
    return {"result": tuple(['Hi', 'hello'])}

    @app.get("/form")
    def form(request: Request):
    result = ""
    return templates.TemplateResponse('form.html', context={'request': request, 'result': result})

    @app.post("/form")
    def form(request: Request, text: str=Form(...)):

    result = ['Hello', 'Hi', 'Bye'] # to simplify the example
    return templates.TemplateResponse('form.html', context={'request': request, 'result': tuple(result)})


    Here is the Jinja2 template:

    form.html

    <!DOCTYPE html>
    <html lang="en">
    <head>
    <meta charset="UTF-8">
    <title>Small example</title>
    </head>
    <body>
    <form method="post">
    <label for="text">Input text:</label>
    <br>
    <textarea id="text" name="text" rows="12" cols="50"></textarea>
    <br/>
    <input type="submit" value="Submit">
    </form>
    <br></br>
    <form method="post">
    <label for="text">Result:</label>
    <br>
    <textarea id="result" name="result" rows="12" cols="50"> {{ result }} </textarea>
    <br/>
    </form>
    </body>
    </html>


    Here, I get the result in the text area as: ('Hello', 'Hi', 'Bye').

    What I need is to display it line by line in the result textarea:

    Hello.

    Hi.

    Bye.

    Continue reading...
    Stack, Fevereiro 28, 2025
    #1

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