python之在 Django 中发送带有附件的电子邮件

我正在尝试以带有附件的 Django 形式发送和通过电子邮件发送，但我不知道如何在不将文件保存在本地的情况下发送文件(由用户上传)。 我有我的表格:

class PrintForm(forms.Form): 
    contact_name = forms.CharField(required=True) 
    contact_email = forms.EmailField(required=True) 
    supervisor = forms.ChoiceField( 
        choices=[(str(sup.email), str(sup.name)) for sup in Supervisors.objects.all()] 
    ) 
    file = forms.FileField() 
    content = forms.CharField( 
        required=True, 
        widget=forms.Textarea 
    ) 

我的观点:

def print(request): 
   #  context = dict() 
   #  context['printers'] = Printer.objects.all() 
   #   return render(request, 'threeD/print.html', context) 
 
   if request.method == 'POST': 
        form = PrintForm(data=request.POST, request = request) 
 
        if form.is_valid(): 
            contact_name = request.POST.get('contact_name', '') 
            contact_email = request.POST.get('contact_email', '') 
            form_content = request.POST.get('content', '') 
            supervisor = form.cleaned_data['supervisor'] 
            template = get_template('threeD/email/contact_template_for_printing.txt') 
            context = Context({ 
                'contact_name': contact_name, 
                'supervisor': supervisor, 
                'contact_email': contact_email, 
                'form_content': form_content, 
            }) 
            content = template.render(context) 
            subject = "New message" 
 
            try: 
                email = EmailMessage( 
                    subject, 
                    content, 
                    contact_email, 
                    [supervisor], 
                    headers={'Reply-To': contact_email} 
                ) 
                #email.attach(...) 
                email.send() 
            except: 
                return "Attachment error" 
 
            messages.success(request, "Thank you for your message.") 
            return redirect('/index/print/') 
 
   else: 
            form = PrintForm(request=request) 
   context_dict = {} 
   context_dict['printers'] = Printer.objects.all() 
   context_dict['form'] = form 
   return render(request, 'threeD/print.html', context_dict) 

所以在我看来，当我发送电子邮件时，有没有办法调用 email.attach(file) 将文件附加到邮件并发送但不在本地保存文件？ (表单和 View 工作正常，没有文件功能实现)

编辑:
这里是 HTML 代码片段，我在这里调用表单:

 <div class="panel-body"> 
        <form role="form" action="" method="post"> 
            {% csrf_token %} 
            {% load bootstrap %} 
               {{ form|bootstrap }} 
 
            <div class="text-center"> 
                <button type="submit" class="btn btn-primary"><span class="glyphicon glyphicon-send"></span>    Send a message</button> 
            </div> 
        </form> 
 </div> 

如有任何帮助，我们将不胜感激。谢谢!

请您参考如下方法:

像这样:

def send_email(request): 
    ... 
    email = EmailMessage( 
        subject, 
        content, 
        contact_email, 
        [to], 
        headers={'Reply-To': contact_email} 
    ) 
    if request.FILES: 
        uploaded_file = request.FILES['file'] # file is the name value which you have provided in form for file field 
        email.attach(uploaded_file.name, uploaded_file.read(), uploaded_file.content_type) 
    email.send()