Answer 1

So, if u are taking list input from users using loop, there in the loop, u can specify that u want a number bigger than 50.

Answer 2

if you're program runs such as the user inputs number then inserting it to a List, you do this pseudo:

input num
if sum(list) + num >= 50
append num to list

On the creation of list and you want it to have a value of > 50, just add random stuff tiLL it reach 50

import random

while True:
if sum(list) < 50
list.append(random.randrange(0,whatEverNumber))
else
break