You are returning a tuple here:

elif retailer_pk:
    return (request, 'page-retailer-single.html', {
        "products": products,
        "sorting": filt["sorting"],
        "filtering": filt["filtering"],
        "retailer": retailer,
    })

Did you forget to add render there perhaps:

elif retailer_pk:
    return render(request, 'page-retailer-single.html', {
        "products": products,
        "sorting": filt["sorting"],
        "filtering": filt["filtering"],
        "retailer": retailer,
    })

You return four variables s1,s2,s3,s4 and receive them using a single variable obj. This is what is called a tuple, obj is associated with 4 values, the values of s1,s2,s3,s4. So, use index as you use in a list to get the value you want, in order.

Copyobj=list_benefits()
print obj[0] + " is a benefit of functions!"
print obj[1] + " is a benefit of functions!"
print obj[2] + " is a benefit of functions!"
print obj[3] + " is a benefit of functions!"

zip returns a list of tuples; you can sort them by accessing the elements with their index:

result_list.sort(key=lambda x: x[1], reverse=True)

if you like to be more explicit, you can use collections.namedtuple, and access the element via dot notation on the attribute name:

from collections import namedtuple


Poll = namedtuple('Poll', ['candidate', 'numvotes'])

uniquecandidate = ['a', 'b', 'c', 'd']
votes = [3, 4, 7, 1]

poll_results = list(map(Poll, uniquecandidate, votes))
poll_results.sort(key=lambda x: x.numvotes, reverse=True)

print(poll_results)

or with typing.NamedTuple:

from typing import NamedTuple

class Poll(NamedTuple):
    candidate: str
    numvotes: int

uniquecandidate = ['a', 'b', 'c', 'd']
votes = [3, 4, 7, 1]

poll_results = list(map(Poll, uniquecandidate, votes))
poll_results.sort(key=lambda x: x.numvotes, reverse=True)

print(poll_results)

out:

[Poll(candidate='c', numvotes=7), Poll(candidate='b', numvotes=4), Poll(candidate='a', numvotes=3), Poll(candidate='d', numvotes=1)]