如何在Django中显示文件大小

我的媒体目录中有一个pdf文件，我希望用户下载，问题是，我如何让用户看到文件的大小，以便他们知道他们想要下载的文件的大小.

另外，是否更好地为pdf文件创建一个模型，如下所示的Models.py中所示？ 处理这一问题的最佳方法是什么？我需要帮助.

Py(这暂时不是我的代码的一部分)

class PersonalStatement(models.Model):
    personal_statement = models.FileField(upload_to='personal_statement/')
    title = models.CharField(max_length=50)

views.py个

def personal_statement_download(request):
    BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
    filename = 'Writing-a-Personal-Statement.pdf'
    filepath = BASE_DIR + '/media/personal_statement/' + filename
    path = open(filepath, 'rb')
    mime_type, _ = mimetypes.guess_type(filepath)
    response = HttpResponse(path, content_type=mime_type)
    response['Content-Disposition'] = "attachment; filename=%s" % filename
    return response

urls.py个

path('personal_statement/download/', views.personal_statement_download,name='personal_statement_download'),

模板/index.html

<a href="{% url 'personal_statement_download'%}" class="applyRightContentContainerSubDownloadLink"> Download File &#8681;</a>

Index.html的views.py

def home (request):
    return render(request, 'core/index.html')