Thanks! :)

pack=[] # Defining the pack of cards
    colours = ['\u2660', '\u2661', '\u2662', '\u2663']
    numbers = ['2','3','4','5','6','7','8','9','10','J','Q','K','A']
    for val in numbers:
        for col in colours:
            pack.append(val+col) # Example: 'J\u2663'

for x in range (0,len(l)): # "Attempt" at a solution. Obviously does not work.
    for i in range (1, len(l)):
        if l[i] == l[x]:
            l.remove(l[x])
            l.remove(l[x])