如何使用angular 7实时从服务器(python)获取数据以保持UI的更新？

import { Injectable } from '@angular/core';
import { HttpClient } from '@angular/common/http';

@Injectable({
  providedIn: 'root'
})
export class DataService {
  constructor(private http: HttpClient) { }

  getData() {
    return this.http.get('http://服务器地址/数据接口');
  }
}

import { Component, OnInit } from '@angular/core';
import { DataService } from '路径/data.service';

@Component({
  selector: 'app-your-component',
  templateUrl: './your-component.component.html',
  styleUrls: ['./your-component.component.css']
})
export class YourComponent implements OnInit {
  data: any;

  constructor(private dataService: DataService) { }

  ngOnInit() {
    this.getDataFromServer();
  }

  getDataFromServer() {
    this.dataService.getData().subscribe((response) => {
      this.data = response;
    });
  }
}

<div>{{ data }}</div>