Answer 1

Remove only removes the first occurrence, so if there are more of that element in there, you'll only drop the first one.

If you know the index, you can write:

del your_list[that_index]

If you want to pull out some item, so remove it and directly use it, you can write:

x = your_list.pop(index)

Answer 2

Python has a remove command
list.remove(element).
Is this what you need?

Answer 3

myint = 4 # <- the number you want to be removed from list
mylist = [1, 2, 3, 4, 5, 1, 2, 3, 4, 5, 4]
for x in range(mylist[:].count(myint)):
mylist.remove(myint)
print(mylist)