import instaloader
from time import sleep
from random import uniform

L = instaloader.Instaloader()

nikname = input("Input nikname or email: ")
try:
    L.load_session_from_file(nikname)
    sleep(2)
except:
    password = input("Input password: ")
    L.login(nikname, password)
    L.save_session_to_file("way/to/the/session")

parsing_user = input("Input the nickname of the account you want parse: ")

profile = instaloader.Profile.from_username(L.context, parsing_user)
followers = [follower for follower in profile.get_followers()]  # create list of followers
sleep(uniform(2, 5))

lists = []  # arr with all following
for i in followers:
    print(i)
    list = [followee for followee in i.get_followees()]  # list of following
    sleep(uniform(50, 100))
    lists.append(list)  # append in common array



arr_x = []  # arr for counters
arr = list(set(lists))  # array with non-repeating elements
for i in arr:
    counter = lists.count(i)
    if counter == 1:  # if there are no mutual followers - remove element
        arr.remove(i)
    else:
        arr_x.append(counter-1)

arr_y = sorted(arr_x, reverse=True)  # arr sorted counters
for i in arr_y:
    z = arr_x.index(i)  # define an index in an unsorted array
    print(arr[z], "Mutual followers: ", i)
    arr_x[z] = -1  # in order not to lose order - we do not delete an element, but change it to -1