backend/api/main.py

from fastapi import FastAPI
import os
import sys
src_directory = os.path.abspath(os.path.join(os.path.dirname(__file__), "../..", "backend"))
sys.path.append(src_directory)

from modules import usefile
from utils import logger

app = FastAPI()

@app.get("/showdata")
def display_data_frame():
    csv_file = usefile.process_data()
    return csv_file.to_csv()