Django:如何传递上下文？

from django.shortcuts import render

def my_view(request):
    context = {'key': 'value'}
    return render(request, 'my_template.html', context)

TEMPLATES = [
    {
        ...
        'OPTIONS': {
            'context_processors': [
                ...
                'myapp.context_processors.my_context_processor',
            ],
        },
    },
]

# myapp/templatetags/my_tags.py
from django import template

register = template.Library()

@register.simple_tag
def my_context_data():
    return {'key': 'value'}

<!-- my_template.html -->
{% load my_tags %}
{% my_context_data as my_data %}