[Django]-Accessing dictionary by key in Django template

As @Alasdair suggests, you can use a template filter.
In your templatetags directory, create the following file dict_key.py:

from django.template.defaultfilters import register

@register.filter(name='dict_key')
def dict_key(d, k):
    '''Returns the given key from a dictionary.'''
    return d[k]

Then, in your HTML, you can write:

{% for k in json.items %} 
  <li>{{ k }} - {{ json.items|dict_key:k }}</li>
{% endfor %}

For example, to send the below dictionary
dict = {'name':'myname','number':'mynumber'}

views :
return render(request, self.template_name, {'dict': dict})

To render the value in html template:
<p>{{ dict.name }}</p>

It prints 'myname'

To overcome this problem you could try something like this:

def get_context_data(self, **kwargs):
    context['cart'] = []
    cart = Cart()
    cart.name = book.name
    cart.author = book.author.name
    cart.publisher = book.publisher.name
    cart.price = 123
    cart.discount = 12
    cart.total = 100
    context['cart'].append(cart)
    return context


class Cart(object):
    """
    Cart Template class

    This is a magic class, having attributes
    name, author, publisher, price, discount, total, image
    You can add other attributes on the fly
    """
    pass


By this way you can access your cart something like this:
{% for item in cart %}
    <div class="jumbotron">
    <div>
    <img src="{{item.image}}" />
    <div class="book_name"> <b>{{item.name}}</b></div>
    <div class="book_by"><i>{{item.author}}</i></div>
    <span>Rs. {{item.price}}</span> <i>{{item.discount}}% OFF </i>
    <b>Rs. {{item.total}}</b>
{% endfor %}