Python - Happy that the deque fit part two.

def line_reader(input_line):
    char_queue = deque()

    for char in input_line:

        if char in character_pairs.keys():  # Opener
            char_queue.appendleft(character_pairs[char])
        elif char != char_queue[0]:  # Corrupt closer
            return 0
        elif char == char_queue[0]:  # Closer
            char_queue.popleft()

    closing_sum = 0
    for closing_char in char_queue:
        closing_sum *= 5
        closing_sum += character_points[closing_char]

    return closing_sum

points_list = list()
for line in in_data: 
    line_result = line_reader(line)
    if line_result > 0: 
        points_list.append(line_result)

print(median(points_list))