Django counter tag, can generate counter in case of single or multiple for loop.

counter_tag.py

#Adapted from https://djangosnippets.org/snippets/2619/

@register.tag(name='counter')
def do_counter(parser, token):
    """
    Counter tag. Can be used to output and increment a counter.

    Usage:
    - {% counter %} to output and post-increment the counter variable
    - {% counter reset %} to reset the counter variable to 1
    - {% counter last %} to access the last counter variable without incrementing

    """
    try:
        tag_name, request = token.contents.split(None, 1)
    except ValueError:
        request = None

    if request == 'reset':
        reset = True
        last = False
    elif request == 'last':
        last = True
        reset = False
    else:
        reset = False
        last = False

    return CounterNode(reset, last)


class CounterNode(template.Node):
    def __init__(self, reset, last):
        self.reset = reset
        self.last= last

    def render(self, context):
        # When initializing or resetting, set counter variable in render_context to 1.
        if self.reset or ('counter' not in context.render_context):
            context.render_context['counter'] = 1

        # When resetting, we don't want to return anything
        if self.reset:
            return ''
        # When ask for old, return previous count
        if self.last:
            return context.render_context['counter']-1

        counter = context.render_context['counter']

        # Increment counter
        context.render_context['counter'] += 1

        # Return counter
        return counter

Thanks for response. I try to implement it but I didn't be able to reset the counter in django.

I appreciate that you put more instructions.